CodingChatGPTDeveloperPythonJavaScriptFree Templates

ChatGPT Prompts for Coding — 70+ Free Developer Templates (2026)

Copy-paste ChatGPT prompts for every developer workflow — debugging, writing functions, refactoring, testing, API development, and code review. Tested with Python, JavaScript, TypeScript, React, Node.js, and SQL.

March 2026 20 min read

ChatGPT coding prompts are structured instructions that tell ChatGPT exactly what code to write, debug, or refactor. Effective prompts specify the programming language, framework, existing code context, and desired output format. The 70+ templates below cover every developer workflow and are free to copy and paste.

TL;DR

›70+ copy-paste ChatGPT prompts for software developers
›Covers debugging, writing functions, refactoring, testing, APIs, and code review
›Works with Python, JavaScript, TypeScript, React, Node.js, SQL, and more
›Replace {{placeholders}} with your code context and paste into ChatGPT
›Save favorites to your free AI Prompt Library

1. Debugging & Error Fixing

Paste your error message and code — ChatGPT traces the root cause and provides a corrected version.

Fix This Error

Any language — paste error + code

I'm getting this error in my {{language}} project:

{{error message}}

Here's the relevant code:

{{code snippet}}

Explain what's causing this error and provide the corrected code with comments explaining each fix.

Debug Logic Bug

When output is wrong but no error is thrown

This {{language}} function should {{expected behavior}} but instead it {{actual behavior}}:

{{code}}

Trace through the logic step by step, identify the bug, and provide the corrected version.

Memory Leak Detection

Performance degradation over time

Analyze this {{language}} code for potential memory leaks or performance issues:

{{code}}

Identify problems, explain why they occur, and provide optimized code.

Stack Trace Analysis

Deciphering crash reports

Help me understand this stack trace from my {{framework}} application:

{{stack trace}}

Explain the error chain, identify the root cause, and suggest the fix.

Race Condition Fix

Async and concurrent code issues

I suspect a race condition in this {{language}} async code:

{{code}}

Identify any race conditions, explain why they occur, and provide a thread-safe version.

Type Error Resolution

TypeScript projects with type errors

I'm getting TypeScript type errors in this code:

{{code}}

Errors:
{{type errors}}

Fix the type issues while maintaining the intended functionality. Show the corrected types.

API Response Debug

Unexpected API output

My {{framework}} API endpoint returns unexpected data. Expected:
{{expected}}

Actual:
{{actual}}

Endpoint code:
{{code}}

Identify why the response differs and fix it.

Build Error Fix

Project won't compile or build

My {{framework}} project won't build. Build output:

{{build errors}}

package.json dependencies:
{{relevant deps}}

Diagnose the build failure and provide step-by-step fix.

CSS Layout Debug

Layout rendering incorrectly

This CSS layout isn't rendering correctly. Expected: {{expected layout}}. Actual: {{actual behavior}}.

HTML:
{{html}}

CSS:
{{css}}

Fix the layout issue and explain what went wrong.

2. Writing Functions & Algorithms

Generate well-typed, edge-case-aware functions from a plain description of inputs and outputs.

Function Generator

Any language — describe the task

Write a {{language}} function that {{task description}}.

Inputs: {{input types and descriptions}}
Output: {{return type and description}}
Edge cases to handle: {{edge cases}}

Include type annotations, error handling, and brief inline comments.

Algorithm Implementation

Data structures and algorithms

Implement {{algorithm name}} in {{language}}.

Requirements:
- Time complexity: {{target}}
- Space complexity: {{target}}
- Handle edge cases: {{list}}

Include the implementation, complexity analysis, and 3 test cases.

Data Structure

Custom data structure with typed methods

Implement a {{data structure}} in {{language}} with the following methods:
{{method list with descriptions}}

Include type annotations, error handling for invalid operations, and usage examples.

String Parser

Parsing structured text or log formats

Write a {{language}} function to parse {{input format}} and extract {{desired data}}.

Example input: {{example}}
Expected output: {{expected}}

Handle malformed input gracefully. Include regex explanation if used.

File Processing

Batch file transformations

Write a {{language}} script that reads {{file type}} files from {{source}}, processes them by {{transformation}}, and outputs {{result format}}.

Handle errors for missing files, encoding issues, and large files.

Recursive Solution

Tree traversal, divide-and-conquer

Solve this problem recursively in {{language}}: {{problem description}}

Provide: recursive solution, base case explanation, memoized version if applicable, and iterative alternative.

Sorting/Filtering

Array manipulation with typed objects

Write a {{language}} function that takes an array of {{object type}} and:
1. Filters by: {{filter criteria}}
2. Sorts by: {{sort criteria}}
3. Returns: {{output format}}

Optimize for {{data size}} items. Include type definitions.

Date/Time Utility

Timezone-aware date operations

Write a {{language}} utility function that {{date/time operation}}.

Handle: timezone conversions, DST, leap years, invalid dates.
Use: {{library or native}}.
Return format: {{format}}.

Validation Function

Input validation with structured error output

Write a {{language}} validation function for {{data type}}.

Rules:
{{validation rules}}

Return: {{ {valid: boolean, errors: string[]} }}.
Include edge cases and test examples.

3. Code Refactoring

Improve readability, reduce complexity, and apply design patterns without changing behavior.

Clean Code Refactor

Messy or hard-to-read code

Refactor this {{language}} code to follow clean code principles:

{{code}}

Improve: naming, single responsibility, DRY violations, and readability. Maintain exact same behavior.

Extract Component

Oversized React components

This React component is too large ({{lines}} lines). Refactor it by extracting logical sub-components:

{{code}}

Create separate components with proper props/types. Maintain all functionality.

Reduce Complexity

High cyclomatic complexity

This function has a cyclomatic complexity of {{n}}. Simplify it:

{{code}}

Reduce nested conditionals, use early returns, and extract helper functions where appropriate.

Modernize Legacy Code

Upgrading old JavaScript or Python

Update this legacy {{language}} code to modern standards ({{target version}}):

{{code}}

Use modern syntax, replace deprecated APIs, add types if applicable. List every change made.

Performance Optimization

Slow functions or hot code paths

Optimize this {{language}} code for performance:

{{code}}

Current issue: {{performance problem}}
Target: {{performance goal}}

Provide optimized version with before/after complexity analysis.

Design Pattern Refactor

Applying GoF or structural patterns

Refactor this code to use the {{pattern name}} pattern:

{{code}}

Explain why this pattern fits, show the refactored version, and list the benefits.

Remove Duplication

DRY violations across files

Identify and eliminate code duplication in these files:

{{code blocks}}

Extract shared logic into reusable functions/modules. Maintain all existing behavior.

Improve Error Handling

Adding robust error boundaries

Add robust error handling to this {{language}} code:

{{code}}

Add: try/catch blocks, input validation, custom error types, graceful degradation, and meaningful error messages.

4. Unit Tests & Test Generation

Generate comprehensive test suites — happy path, edge cases, mocks, and E2E flows.

Unit Test Suite

Full coverage for a function

Write unit tests for this {{language}} function using {{test framework}}:

{{code}}

Cover: happy path, edge cases, error cases, boundary values. Aim for >90% coverage. Use descriptive test names.

Test Edge Cases

Finding edge cases you haven't thought of

Generate edge case tests for this function:

{{code}}

Think about: null/undefined, empty inputs, very large inputs, special characters, concurrent access, type coercion.

Integration Test

API endpoints with mocked dependencies

Write integration tests for this {{framework}} API endpoint:

{{endpoint code}}

Test: success response, validation errors, auth failures, database errors. Use {{test library}} and mock {{external services}}.

Snapshot Test

React component rendering

Write snapshot tests for this React component using {{test library}}:

{{component code}}

Test: default render, each prop variation, loading state, error state, responsive breakpoints.

Mock Setup

Complex external dependencies

Create a test setup with mocks for this module:

{{code}}

External dependencies to mock: {{list}}

Using {{test framework}}, create factory functions for test data and reusable mock configurations.

E2E Test Scenario

Playwright or Cypress user flows

Write an E2E test using {{Playwright/Cypress}} for this user flow:

1. {{step 1}}
2. {{step 2}}
3. {{step 3}}

Page structure:
{{relevant HTML}}

Include assertions, waits for async operations, and error recovery.

Test Data Factory

Generating realistic test fixtures

Create a test data factory for {{model/type}} using {{language}}:

{{type definition}}

Include: default factory, traits/overrides, sequence IDs, related model factories. Use {{faker/factory library}}.

Property-Based Test

Invariant testing with generated inputs

Write property-based tests for this function using {{library}}:

{{code}}

Define generators for inputs. Test invariants that should hold for ALL inputs, not just examples.

5. API Development

Generate REST endpoints, auth middleware, rate limiting, webhooks, and API documentation.

REST Endpoint

Full CRUD resource with auth

Create a {{framework}} REST API endpoint for {{resource}}.

Methods: GET (list + detail), POST, PUT, DELETE
Auth: {{auth method}}
Validation: {{rules}}
Database: {{ORM/driver}}

Include error handling, pagination for list, and TypeScript types.

API Authentication

JWT, API key, or OAuth middleware

Implement {{auth type}} authentication for my {{framework}} API:

Requirements:
- {{auth requirements}}

Include: middleware, token generation/validation, refresh logic, and error responses.

Rate Limiter

Protecting endpoints from abuse

Implement rate limiting for my {{framework}} API:

Rules:
- {{rate limit rules}}

Use {{storage: Redis/in-memory}}. Include middleware, headers (X-RateLimit-*), and 429 response handling.

Webhook Handler

Stripe, GitHub, or custom webhooks

Create a webhook handler for {{service}} events in {{framework}}:

Events to handle: {{event list}}
Verify: signature validation
Process: idempotent handling

Include retry logic and error logging.

GraphQL Schema

Typed schema with resolvers

Design a GraphQL schema and resolvers for {{domain}}:

Types: {{entity list}}
Queries: {{query list}}
Mutations: {{mutation list}}

Include input validation, error handling, and N+1 query prevention.

API Middleware

Request/response transformation

Create a {{framework}} middleware that {{functionality}}.

Requirements:
{{middleware requirements}}

Handle: async operations, error propagation, request/response modification. Include types and tests.

API Error Handler

Centralized error response format

Create a centralized error handling system for my {{framework}} API:

Error types: validation, authentication, authorization, not found, rate limit, internal.

Include: custom error classes, error middleware, consistent JSON response format, logging.

Database Migration

Schema changes with rollback

Write a database migration for {{ORM}} to:
{{schema changes}}

Include: up migration, down migration (rollback), seed data if needed. Handle existing data gracefully.

API Documentation

OpenAPI/Swagger spec generation

Generate OpenAPI/Swagger documentation for this API endpoint:

{{endpoint code}}

Include: request/response schemas, auth requirements, error responses, examples, and descriptions.

6. Frontend & React

Build accessible components, custom hooks, forms, state, and performance-optimized UI.

React Component

Accessible, typed UI component

Create a React component for {{component description}} using TypeScript and {{CSS solution}}.

Props:
{{prop list with types}}

Features: {{feature list}}
Accessibility: ARIA labels, keyboard navigation

Include prop types, default values, and usage example.

Custom Hook

Reusable stateful logic

Create a custom React hook called use{{HookName}} that {{functionality}}.

Inputs: {{parameters}}
Returns: {{return value shape}}

Handle: loading state, errors, cleanup, and re-renders. Include TypeScript types and usage example.

Form with Validation

Forms with Zod/react-hook-form

Build a React form for {{form purpose}} with:

Fields: {{field list with validation rules}}
Validation: {{library: react-hook-form/formik/zod}}
Submit: {{API endpoint}}

Include error display, loading state, success feedback, and accessibility.

State Management

Zustand, Context, or Redux store

Implement state management for {{feature}} using {{solution: Zustand/Context/Redux}}:

State shape: {{state description}}
Actions: {{action list}}

Include TypeScript types, selectors, and React component integration.

Data Fetching

SWR or React Query with pagination

Implement data fetching for {{resource}} using {{library: SWR/React Query/fetch}}:

Endpoint: {{API URL}}
Features: pagination, search/filter, caching, optimistic updates

Include loading/error states, TypeScript types, and refetch logic.

Animation Component

Framer Motion or CSS animations

Create an animated {{component type}} using {{Framer Motion/CSS}}:

Animation: {{description}}
Trigger: {{on mount/scroll/hover/click}}

Include reduced-motion support, performance optimization, and clean unmount.

Responsive Layout

Mobile-first layouts with Tailwind

Create a responsive {{layout type}} using {{Tailwind/CSS Grid/Flexbox}}:

Breakpoints: mobile (< 768px), tablet (768-1024px), desktop (> 1024px)
Content: {{content description}}

Include: smooth transitions, no layout shift, accessibility.

Error Boundary

Graceful UI failure fallbacks

Create a React error boundary component for {{section}}:

Features: fallback UI, error logging to {{service}}, retry button, different fallbacks per error type.

Include TypeScript types and usage example wrapping child components.

Performance Optimization

Memoization, code splitting, virtual lists

Optimize this React component for performance:

{{code}}

Apply: React.memo, useMemo, useCallback, code splitting, virtual scrolling (if list). Explain each optimization and when it matters.

7. Database & SQL

Write complex queries, design schemas, convert to ORM syntax, and optimize slow queries.

Complex Query

Multi-table queries with optimization

Write a SQL query to {{query goal}}.

Tables:
{{table schemas}}

Requirements: {{specific requirements}}

Optimize for performance. Include index recommendations and explain the query plan.

Schema Design

PostgreSQL or MySQL schema from scratch

Design a database schema for {{application/feature}}:

Entities: {{entity list}}
Relationships: {{relationship list}}

Include: table definitions, indexes, constraints, and migration SQL. Use {{PostgreSQL/MySQL}}.

ORM Query

Convert SQL to Prisma/Sequelize/TypeORM

Convert this SQL query to {{ORM: Prisma/Sequelize/TypeORM}} syntax:

{{SQL query}}

Include TypeScript types for the result and handle the N+1 query problem if applicable.

Data Aggregation

Reports, dashboards, analytics queries

Write a SQL query that aggregates {{data}} by {{grouping}}:

Table: {{schema}}
Metrics: {{calculations needed}}
Filters: {{where conditions}}
Output: {{desired format}}

Include window functions if needed for running totals or rankings.

Full-Text Search

Search with relevance ranking

Implement full-text search for {{table}} in {{PostgreSQL/MySQL}}:

Searchable columns: {{columns}}
Features: relevance ranking, fuzzy matching, highlighting

Include: index creation, search query, and result ranking.

Database Seeder

Realistic dev/test data generation

Create a database seed script for {{ORM/framework}}:

Models: {{model list}}
Records per model: {{counts}}
Relationships: {{how they connect}}

Use realistic fake data. Handle foreign key ordering. Make idempotent.

Query Optimization

Slow queries in production

Optimize this slow SQL query:

{{query}}

Table sizes: {{approximate row counts}}
Current execution time: {{time}}

Provide: optimized query, EXPLAIN analysis, index recommendations, and expected improvement.

Stored Procedure

Complex business logic in the database

Create a {{PostgreSQL/MySQL}} stored procedure for {{task}}:

Inputs: {{parameters}}
Logic: {{business rules}}
Output: {{return format}}

Include error handling, transaction management, and a call example.

8. Code Review & Documentation

Get PR-style feedback, security audits, READMEs, docstrings, and architectural decision records.

Code Review

Pre-merge pull request review

Review this {{language}} code for a pull request:

{{code}}

Check: bugs, security vulnerabilities, performance issues, naming, SOLID principles, test coverage gaps.

Format as PR review comments with line references and severity (critical/suggestion).

Security Audit

Checking for vulnerabilities before deployment

Audit this {{language}} code for security vulnerabilities:

{{code}}

Check: injection attacks, XSS, CSRF, auth bypass, data exposure, insecure dependencies.

List each finding with severity, impact, and recommended fix.

README Generator

New project documentation

Generate a README.md for this project:

Project: {{name}}
Purpose: {{description}}
Stack: {{technologies}}

Include: badges, installation, usage examples, API reference, contributing guidelines, license.

JSDoc/Docstring

Adding inline documentation

Add comprehensive documentation to this {{language}} code:

{{code}}

Include: function descriptions, @param types and descriptions, @returns, @throws, @example, and inline comments for complex logic.

Architecture Decision Record

Documenting technology choices

Write an ADR for choosing {{technology/approach}} for {{problem}}.

Context: {{project context}}
Options considered: {{options}}
Decision: {{chosen option}}

Include: consequences, trade-offs, and migration plan.

Changelog Entry

Release notes and version logs

Write a changelog entry for these code changes:

{{diff or description}}

Format: Keep a Changelog style. Categorize into: Added, Changed, Deprecated, Removed, Fixed, Security. Be specific and user-facing.

API Client SDK

Generating typed client libraries

Generate a typed {{language}} API client for this REST API:

Endpoints:
{{endpoint list with methods and payloads}}

Include: type definitions, error handling, auth header injection, request/response interceptors.

Dependency Audit

Reviewing package.json or requirements.txt

Audit these project dependencies for issues:

{{package.json or requirements.txt}}

Check: known vulnerabilities, outdated packages, unused dependencies, license compatibility, bundle size impact.

Git Workflow

Setting up team branching strategy

Set up a Git workflow for {{team size}} developers:

Branching: {{strategy: GitFlow/trunk-based/feature branches}}

Include: branch naming, commit message format, PR template, CI checks, merge strategy, and release process.

Performance Profiling

Identifying bottlenecks with benchmarks

Profile this {{language}} code and suggest optimizations:

{{code}}

Current performance: {{metrics}}
Target: {{goals}}

Provide: profiling approach, bottleneck identification, optimized code, and benchmark comparisons.

Frequently Asked Questions

What are the best ChatGPT prompts for coding?

The best coding prompts include language, framework version, existing code context, and desired output format. This guide has 70+ tested templates for debugging, writing functions, refactoring, testing, and API development.

Can ChatGPT write production-ready code?

ChatGPT produces solid first drafts but always review for edge cases, security, and performance. The prompts here include constraints like "handle errors" and "add types" to improve output quality.

Do these coding prompts work with Claude and Copilot?

Yes. All prompts are model-agnostic. They work with ChatGPT, Claude (especially strong for long code), Gemini, and can inspire Copilot comments. Claude handles complex multi-file refactors better.

Which programming languages do these prompts cover?

Python, JavaScript/TypeScript, React, Node.js, SQL, HTML/CSS, and general patterns. Replace the {{language}} placeholder to use with any language.

Are these coding prompts free?

Yes. Every prompt is free for personal or commercial use. Save favorites to your AI Prompt Library account.

Related Resources

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Component generators, TypeScript patterns, hooks

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30+ CLI templates for the Anthropic terminal tool

Browse All Prompts

Explore the full AI Prompt Library gallery

Browse all AI coding prompts →

CodingChatGPTDeveloperPythonJavaScriptFree Templates

ChatGPT Prompts for Coding — 70+ Free Developer Templates (2026)

March 2026 20 min read

TL;DR

›70+ copy-paste ChatGPT prompts for software developers
›Covers debugging, writing functions, refactoring, testing, APIs, and code review
›Works with Python, JavaScript, TypeScript, React, Node.js, SQL, and more
›Replace {{placeholders}} with your code context and paste into ChatGPT
›Save favorites to your free AI Prompt Library

1. Debugging & Error Fixing

Paste your error message and code — ChatGPT traces the root cause and provides a corrected version.

Fix This Error

Any language — paste error + code

I'm getting this error in my {{language}} project:

{{error message}}

Here's the relevant code:

{{code snippet}}

Explain what's causing this error and provide the corrected code with comments explaining each fix.

Debug Logic Bug

When output is wrong but no error is thrown

This {{language}} function should {{expected behavior}} but instead it {{actual behavior}}:

{{code}}

Trace through the logic step by step, identify the bug, and provide the corrected version.

Memory Leak Detection

Performance degradation over time

Analyze this {{language}} code for potential memory leaks or performance issues:

{{code}}

Identify problems, explain why they occur, and provide optimized code.

Stack Trace Analysis

Deciphering crash reports

Help me understand this stack trace from my {{framework}} application:

{{stack trace}}

Explain the error chain, identify the root cause, and suggest the fix.

Race Condition Fix

Async and concurrent code issues

I suspect a race condition in this {{language}} async code:

{{code}}

Identify any race conditions, explain why they occur, and provide a thread-safe version.

Type Error Resolution

TypeScript projects with type errors

I'm getting TypeScript type errors in this code:

{{code}}

Errors:
{{type errors}}

Fix the type issues while maintaining the intended functionality. Show the corrected types.

API Response Debug

Unexpected API output

My {{framework}} API endpoint returns unexpected data. Expected:
{{expected}}

Actual:
{{actual}}

Endpoint code:
{{code}}

Identify why the response differs and fix it.

Build Error Fix

Project won't compile or build

My {{framework}} project won't build. Build output:

{{build errors}}

package.json dependencies:
{{relevant deps}}

Diagnose the build failure and provide step-by-step fix.

CSS Layout Debug

Layout rendering incorrectly

This CSS layout isn't rendering correctly. Expected: {{expected layout}}. Actual: {{actual behavior}}.

HTML:
{{html}}

CSS:
{{css}}

Fix the layout issue and explain what went wrong.

2. Writing Functions & Algorithms

Generate well-typed, edge-case-aware functions from a plain description of inputs and outputs.

Function Generator

Any language — describe the task

Write a {{language}} function that {{task description}}.

Inputs: {{input types and descriptions}}
Output: {{return type and description}}
Edge cases to handle: {{edge cases}}

Include type annotations, error handling, and brief inline comments.

Algorithm Implementation

Data structures and algorithms

Implement {{algorithm name}} in {{language}}.

Requirements:
- Time complexity: {{target}}
- Space complexity: {{target}}
- Handle edge cases: {{list}}

Include the implementation, complexity analysis, and 3 test cases.

Data Structure

Custom data structure with typed methods

Implement a {{data structure}} in {{language}} with the following methods:
{{method list with descriptions}}

Include type annotations, error handling for invalid operations, and usage examples.

String Parser

Parsing structured text or log formats

Write a {{language}} function to parse {{input format}} and extract {{desired data}}.

Example input: {{example}}
Expected output: {{expected}}

Handle malformed input gracefully. Include regex explanation if used.

File Processing

Batch file transformations

Write a {{language}} script that reads {{file type}} files from {{source}}, processes them by {{transformation}}, and outputs {{result format}}.

Handle errors for missing files, encoding issues, and large files.

Recursive Solution

Tree traversal, divide-and-conquer

Solve this problem recursively in {{language}}: {{problem description}}

Provide: recursive solution, base case explanation, memoized version if applicable, and iterative alternative.

Sorting/Filtering

Array manipulation with typed objects

Write a {{language}} function that takes an array of {{object type}} and:
1. Filters by: {{filter criteria}}
2. Sorts by: {{sort criteria}}
3. Returns: {{output format}}

Optimize for {{data size}} items. Include type definitions.

Date/Time Utility

Timezone-aware date operations

Write a {{language}} utility function that {{date/time operation}}.

Handle: timezone conversions, DST, leap years, invalid dates.
Use: {{library or native}}.
Return format: {{format}}.

Validation Function

Input validation with structured error output

Write a {{language}} validation function for {{data type}}.

Rules:
{{validation rules}}

Return: {{ {valid: boolean, errors: string[]} }}.
Include edge cases and test examples.

3. Code Refactoring

Improve readability, reduce complexity, and apply design patterns without changing behavior.

Clean Code Refactor

Messy or hard-to-read code

Refactor this {{language}} code to follow clean code principles:

{{code}}

Improve: naming, single responsibility, DRY violations, and readability. Maintain exact same behavior.

Extract Component

Oversized React components

This React component is too large ({{lines}} lines). Refactor it by extracting logical sub-components:

{{code}}

Create separate components with proper props/types. Maintain all functionality.

Reduce Complexity

High cyclomatic complexity

This function has a cyclomatic complexity of {{n}}. Simplify it:

{{code}}

Reduce nested conditionals, use early returns, and extract helper functions where appropriate.

Modernize Legacy Code

Upgrading old JavaScript or Python

Update this legacy {{language}} code to modern standards ({{target version}}):

{{code}}

Use modern syntax, replace deprecated APIs, add types if applicable. List every change made.

Performance Optimization

Slow functions or hot code paths

Optimize this {{language}} code for performance:

{{code}}

Current issue: {{performance problem}}
Target: {{performance goal}}

Provide optimized version with before/after complexity analysis.

Design Pattern Refactor

Applying GoF or structural patterns

Refactor this code to use the {{pattern name}} pattern:

{{code}}

Explain why this pattern fits, show the refactored version, and list the benefits.

Remove Duplication

DRY violations across files

Identify and eliminate code duplication in these files:

{{code blocks}}

Extract shared logic into reusable functions/modules. Maintain all existing behavior.

Improve Error Handling

Adding robust error boundaries

Add robust error handling to this {{language}} code:

{{code}}

Add: try/catch blocks, input validation, custom error types, graceful degradation, and meaningful error messages.

4. Unit Tests & Test Generation

Generate comprehensive test suites — happy path, edge cases, mocks, and E2E flows.

Unit Test Suite

Full coverage for a function

Write unit tests for this {{language}} function using {{test framework}}:

{{code}}

Cover: happy path, edge cases, error cases, boundary values. Aim for >90% coverage. Use descriptive test names.

Test Edge Cases

Finding edge cases you haven't thought of

Generate edge case tests for this function:

{{code}}

Think about: null/undefined, empty inputs, very large inputs, special characters, concurrent access, type coercion.

Integration Test

API endpoints with mocked dependencies

Write integration tests for this {{framework}} API endpoint:

{{endpoint code}}

Test: success response, validation errors, auth failures, database errors. Use {{test library}} and mock {{external services}}.

Snapshot Test

React component rendering

Write snapshot tests for this React component using {{test library}}:

{{component code}}

Test: default render, each prop variation, loading state, error state, responsive breakpoints.

Mock Setup

Complex external dependencies

Create a test setup with mocks for this module:

{{code}}

External dependencies to mock: {{list}}

Using {{test framework}}, create factory functions for test data and reusable mock configurations.

E2E Test Scenario

Playwright or Cypress user flows

Write an E2E test using {{Playwright/Cypress}} for this user flow:

1. {{step 1}}
2. {{step 2}}
3. {{step 3}}

Page structure:
{{relevant HTML}}

Include assertions, waits for async operations, and error recovery.

Test Data Factory

Generating realistic test fixtures

Create a test data factory for {{model/type}} using {{language}}:

{{type definition}}

Include: default factory, traits/overrides, sequence IDs, related model factories. Use {{faker/factory library}}.

Property-Based Test

Invariant testing with generated inputs

Write property-based tests for this function using {{library}}:

{{code}}

Define generators for inputs. Test invariants that should hold for ALL inputs, not just examples.

5. API Development

Generate REST endpoints, auth middleware, rate limiting, webhooks, and API documentation.

REST Endpoint

Full CRUD resource with auth

Create a {{framework}} REST API endpoint for {{resource}}.

Methods: GET (list + detail), POST, PUT, DELETE
Auth: {{auth method}}
Validation: {{rules}}
Database: {{ORM/driver}}

Include error handling, pagination for list, and TypeScript types.

API Authentication

JWT, API key, or OAuth middleware

Implement {{auth type}} authentication for my {{framework}} API:

Requirements:
- {{auth requirements}}

Include: middleware, token generation/validation, refresh logic, and error responses.

Rate Limiter

Protecting endpoints from abuse

Implement rate limiting for my {{framework}} API:

Rules:
- {{rate limit rules}}

Use {{storage: Redis/in-memory}}. Include middleware, headers (X-RateLimit-*), and 429 response handling.

Webhook Handler

Stripe, GitHub, or custom webhooks

Create a webhook handler for {{service}} events in {{framework}}:

Events to handle: {{event list}}
Verify: signature validation
Process: idempotent handling

Include retry logic and error logging.

GraphQL Schema

Typed schema with resolvers

Design a GraphQL schema and resolvers for {{domain}}:

Types: {{entity list}}
Queries: {{query list}}
Mutations: {{mutation list}}

Include input validation, error handling, and N+1 query prevention.

API Middleware

Request/response transformation

Create a {{framework}} middleware that {{functionality}}.

Requirements:
{{middleware requirements}}

Handle: async operations, error propagation, request/response modification. Include types and tests.

API Error Handler

Centralized error response format

Create a centralized error handling system for my {{framework}} API:

Error types: validation, authentication, authorization, not found, rate limit, internal.

Include: custom error classes, error middleware, consistent JSON response format, logging.

Database Migration

Schema changes with rollback

Write a database migration for {{ORM}} to:
{{schema changes}}

Include: up migration, down migration (rollback), seed data if needed. Handle existing data gracefully.

API Documentation

OpenAPI/Swagger spec generation

Generate OpenAPI/Swagger documentation for this API endpoint:

{{endpoint code}}

Include: request/response schemas, auth requirements, error responses, examples, and descriptions.

6. Frontend & React

Build accessible components, custom hooks, forms, state, and performance-optimized UI.

React Component

Accessible, typed UI component

Create a React component for {{component description}} using TypeScript and {{CSS solution}}.

Props:
{{prop list with types}}

Features: {{feature list}}
Accessibility: ARIA labels, keyboard navigation

Include prop types, default values, and usage example.

Custom Hook

Reusable stateful logic

Create a custom React hook called use{{HookName}} that {{functionality}}.

Inputs: {{parameters}}
Returns: {{return value shape}}

Handle: loading state, errors, cleanup, and re-renders. Include TypeScript types and usage example.

Form with Validation

Forms with Zod/react-hook-form

Build a React form for {{form purpose}} with:

Fields: {{field list with validation rules}}
Validation: {{library: react-hook-form/formik/zod}}
Submit: {{API endpoint}}

Include error display, loading state, success feedback, and accessibility.

State Management

Zustand, Context, or Redux store

Implement state management for {{feature}} using {{solution: Zustand/Context/Redux}}:

State shape: {{state description}}
Actions: {{action list}}

Include TypeScript types, selectors, and React component integration.

Data Fetching

SWR or React Query with pagination

Implement data fetching for {{resource}} using {{library: SWR/React Query/fetch}}:

Endpoint: {{API URL}}
Features: pagination, search/filter, caching, optimistic updates

Include loading/error states, TypeScript types, and refetch logic.

Animation Component

Framer Motion or CSS animations

Create an animated {{component type}} using {{Framer Motion/CSS}}:

Animation: {{description}}
Trigger: {{on mount/scroll/hover/click}}

Include reduced-motion support, performance optimization, and clean unmount.

Responsive Layout

Mobile-first layouts with Tailwind

Create a responsive {{layout type}} using {{Tailwind/CSS Grid/Flexbox}}:

Breakpoints: mobile (< 768px), tablet (768-1024px), desktop (> 1024px)
Content: {{content description}}

Include: smooth transitions, no layout shift, accessibility.

Error Boundary

Graceful UI failure fallbacks

Create a React error boundary component for {{section}}:

Features: fallback UI, error logging to {{service}}, retry button, different fallbacks per error type.

Include TypeScript types and usage example wrapping child components.

Performance Optimization

Memoization, code splitting, virtual lists

Optimize this React component for performance:

{{code}}

Apply: React.memo, useMemo, useCallback, code splitting, virtual scrolling (if list). Explain each optimization and when it matters.

7. Database & SQL

Write complex queries, design schemas, convert to ORM syntax, and optimize slow queries.

Complex Query

Multi-table queries with optimization

Write a SQL query to {{query goal}}.

Tables:
{{table schemas}}

Requirements: {{specific requirements}}

Optimize for performance. Include index recommendations and explain the query plan.

Schema Design

PostgreSQL or MySQL schema from scratch

Design a database schema for {{application/feature}}:

Entities: {{entity list}}
Relationships: {{relationship list}}

Include: table definitions, indexes, constraints, and migration SQL. Use {{PostgreSQL/MySQL}}.

ORM Query

Convert SQL to Prisma/Sequelize/TypeORM

Convert this SQL query to {{ORM: Prisma/Sequelize/TypeORM}} syntax:

{{SQL query}}

Include TypeScript types for the result and handle the N+1 query problem if applicable.

Data Aggregation

Reports, dashboards, analytics queries

Write a SQL query that aggregates {{data}} by {{grouping}}:

Table: {{schema}}
Metrics: {{calculations needed}}
Filters: {{where conditions}}
Output: {{desired format}}

Include window functions if needed for running totals or rankings.

Full-Text Search

Search with relevance ranking

Implement full-text search for {{table}} in {{PostgreSQL/MySQL}}:

Searchable columns: {{columns}}
Features: relevance ranking, fuzzy matching, highlighting

Include: index creation, search query, and result ranking.

Database Seeder

Realistic dev/test data generation

Create a database seed script for {{ORM/framework}}:

Models: {{model list}}
Records per model: {{counts}}
Relationships: {{how they connect}}

Use realistic fake data. Handle foreign key ordering. Make idempotent.

Query Optimization

Slow queries in production

Optimize this slow SQL query:

{{query}}

Table sizes: {{approximate row counts}}
Current execution time: {{time}}

Provide: optimized query, EXPLAIN analysis, index recommendations, and expected improvement.

Stored Procedure

Complex business logic in the database

Create a {{PostgreSQL/MySQL}} stored procedure for {{task}}:

Inputs: {{parameters}}
Logic: {{business rules}}
Output: {{return format}}

Include error handling, transaction management, and a call example.

8. Code Review & Documentation

Get PR-style feedback, security audits, READMEs, docstrings, and architectural decision records.

Code Review

Pre-merge pull request review

Review this {{language}} code for a pull request:

{{code}}

Check: bugs, security vulnerabilities, performance issues, naming, SOLID principles, test coverage gaps.

Format as PR review comments with line references and severity (critical/suggestion).

Security Audit

Checking for vulnerabilities before deployment

Audit this {{language}} code for security vulnerabilities:

{{code}}

Check: injection attacks, XSS, CSRF, auth bypass, data exposure, insecure dependencies.

List each finding with severity, impact, and recommended fix.

README Generator

New project documentation

Generate a README.md for this project:

Project: {{name}}
Purpose: {{description}}
Stack: {{technologies}}

Include: badges, installation, usage examples, API reference, contributing guidelines, license.

JSDoc/Docstring

Adding inline documentation

Add comprehensive documentation to this {{language}} code:

{{code}}

Include: function descriptions, @param types and descriptions, @returns, @throws, @example, and inline comments for complex logic.

Architecture Decision Record

Documenting technology choices

Write an ADR for choosing {{technology/approach}} for {{problem}}.

Context: {{project context}}
Options considered: {{options}}
Decision: {{chosen option}}

Include: consequences, trade-offs, and migration plan.

Changelog Entry

Release notes and version logs

Write a changelog entry for these code changes:

{{diff or description}}

Format: Keep a Changelog style. Categorize into: Added, Changed, Deprecated, Removed, Fixed, Security. Be specific and user-facing.

API Client SDK

Generating typed client libraries

Generate a typed {{language}} API client for this REST API:

Endpoints:
{{endpoint list with methods and payloads}}

Include: type definitions, error handling, auth header injection, request/response interceptors.

Dependency Audit

Reviewing package.json or requirements.txt

Audit these project dependencies for issues:

{{package.json or requirements.txt}}

Check: known vulnerabilities, outdated packages, unused dependencies, license compatibility, bundle size impact.

Git Workflow

Setting up team branching strategy

Set up a Git workflow for {{team size}} developers:

Branching: {{strategy: GitFlow/trunk-based/feature branches}}

Include: branch naming, commit message format, PR template, CI checks, merge strategy, and release process.

Performance Profiling

Identifying bottlenecks with benchmarks

Profile this {{language}} code and suggest optimizations:

{{code}}

Current performance: {{metrics}}
Target: {{goals}}

Provide: profiling approach, bottleneck identification, optimized code, and benchmark comparisons.

Frequently Asked Questions

What are the best ChatGPT prompts for coding?

Can ChatGPT write production-ready code?

ChatGPT produces solid first drafts but always review for edge cases, security, and performance. The prompts here include constraints like "handle errors" and "add types" to improve output quality.

Do these coding prompts work with Claude and Copilot?

Yes. All prompts are model-agnostic. They work with ChatGPT, Claude (especially strong for long code), Gemini, and can inspire Copilot comments. Claude handles complex multi-file refactors better.

Which programming languages do these prompts cover?

Python, JavaScript/TypeScript, React, Node.js, SQL, HTML/CSS, and general patterns. Replace the {{language}} placeholder to use with any language.

Are these coding prompts free?

Yes. Every prompt is free for personal or commercial use. Save favorites to your AI Prompt Library account.

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