Development Tools
17 tools to format, validate, and process data in your browser.
Git Diff Visualizer
Advanced Git diff analysis with visual representation, code quality assessment, security insights, and comprehensive change impact analysis
JSON Flattener
Flatten nested JSON objects to flat key-value pairs or unflatten back to nested structure with customizable delimiters and array handling
JSON Path Extractor - Get, Search & Extract Values from JSON
Get specific values from JSON data instantly! Search through nested objects, extract array elements, and retrieve data using powerful JSONPath expressions. Perfect for getting exactly what you need from complex JSON structures.
JSON Workspace - Format, Extract & Transform
Complete JSON toolkit in one unified workspace. Format and beautify JSON, extract specific values with JSONPath queries, flatten nested structures, and transform data - all without switching tools. Perfect for developers working with complex JSON data.
Configuration File Validator
Comprehensive validation for configuration files including JSON, YAML, TOML, XML, Dockerfile, Nginx, Apache configs with syntax, security, and best practices checking
Validate YAML - YAML Validator & Syntax Checker
Validate YAML syntax online with comprehensive error checking, indentation validation, and structure analysis. Free YAML validator for configuration files, Docker Compose, Kubernetes manifests, and more.
SQL Query Builder
Build and format SQL queries with an intuitive interface. Support for multiple database systems and query types with syntax validation and optimization suggestions.
Database Schema Visualizer
Stop drawing database diagrams manually! Visualize database schemas with interactive ERD diagrams, analyze table relationships, detect normalization issues, and generate performance optimization suggestions. Supports MySQL, PostgreSQL, SQL Server, and Oracle DDL. Perfect for database design, documentation, and optimization. Free, works offline, unlimited visualizations.
Database Query Optimizer
Analyze and optimize SQL queries with performance suggestions, index recommendations, and database-specific best practices
Load Testing Configuration Generator
Generate comprehensive load testing configurations for popular frameworks like K6, JMeter, Artillery, Locust, and more
Performance Budget Calculator
Calculate comprehensive performance budgets for web applications with Core Web Vitals, resource limits, and framework-specific optimization guidance
Log Analysis Tool
Comprehensive log file analysis with security, performance, and traffic insights for Apache, Nginx, and other web server logs
CLI Commands Reference
Searchable command-line reference covering Linux, macOS, Windows, PowerShell, Docker, and Git with syntax, flags, and safety tips
AI CLI Assistant
Authoritative AI CLI reference covering Claude Code, Ollama, OpenAI, Vertex AI Gemini, Cursor, GitHub Copilot, and aider with syntax, flags, and safety notes.
CLI Quick Reference
Quick reference cheat sheet for essential CLI commands with examples and shortcuts. One-liner reference for Git, NPM, Docker, and common terminal tools.
Emoji Reference
Comprehensive emoji reference with Unicode values, HTML codes, CSS codes, and shortcodes for developers and content creators
AI Token Counter
Count tokens for AI prompts and OpenAI-style chat payloads before you send them. Paste plain text, a messages array, or a full Chat Completions JSON request and instantly see token counts for popular models with cost estimates. Everything runs locally in your browser.
Git Diff Visualizer
Advanced Git diff analysis with visual representation, code quality assessment, security insights, and comprehensive change impact analysis
JSON Flattener
Flatten nested JSON objects to flat key-value pairs or unflatten back to nested structure with customizable delimiters and array handling
JSON Path Extractor - Get, Search & Extract Values from JSON
Get specific values from JSON data instantly! Search through nested objects, extract array elements, and retrieve data using powerful JSONPath expressions. Perfect for getting exactly what you need from complex JSON structures.
JSON Workspace - Format, Extract & Transform
Complete JSON toolkit in one unified workspace. Format and beautify JSON, extract specific values with JSONPath queries, flatten nested structures, and transform data - all without switching tools. Perfect for developers working with complex JSON data.
Configuration File Validator
Comprehensive validation for configuration files including JSON, YAML, TOML, XML, Dockerfile, Nginx, Apache configs with syntax, security, and best practices checking
Validate YAML - YAML Validator & Syntax Checker
Validate YAML syntax online with comprehensive error checking, indentation validation, and structure analysis. Free YAML validator for configuration files, Docker Compose, Kubernetes manifests, and more.
SQL Query Builder
Build and format SQL queries with an intuitive interface. Support for multiple database systems and query types with syntax validation and optimization suggestions.
Database Schema Visualizer
Stop drawing database diagrams manually! Visualize database schemas with interactive ERD diagrams, analyze table relationships, detect normalization issues, and generate performance optimization suggestions. Supports MySQL, PostgreSQL, SQL Server, and Oracle DDL. Perfect for database design, documentation, and optimization. Free, works offline, unlimited visualizations.
Database Query Optimizer
Analyze and optimize SQL queries with performance suggestions, index recommendations, and database-specific best practices
Load Testing Configuration Generator
Generate comprehensive load testing configurations for popular frameworks like K6, JMeter, Artillery, Locust, and more
Performance Budget Calculator
Calculate comprehensive performance budgets for web applications with Core Web Vitals, resource limits, and framework-specific optimization guidance
Log Analysis Tool
Comprehensive log file analysis with security, performance, and traffic insights for Apache, Nginx, and other web server logs
CLI Commands Reference
Searchable command-line reference covering Linux, macOS, Windows, PowerShell, Docker, and Git with syntax, flags, and safety tips
AI CLI Assistant
Authoritative AI CLI reference covering Claude Code, Ollama, OpenAI, Vertex AI Gemini, Cursor, GitHub Copilot, and aider with syntax, flags, and safety notes.
CLI Quick Reference
Quick reference cheat sheet for essential CLI commands with examples and shortcuts. One-liner reference for Git, NPM, Docker, and common terminal tools.
Emoji Reference
Comprehensive emoji reference with Unicode values, HTML codes, CSS codes, and shortcodes for developers and content creators
AI Token Counter
Count tokens for AI prompts and OpenAI-style chat payloads before you send them. Paste plain text, a messages array, or a full Chat Completions JSON request and instantly see token counts for popular models with cost estimates. Everything runs locally in your browser.
Related categories
› About development tools
Tools for software development and coding Every tool runs client-side, so you can work with internal or sensitive content without upload workflows.
Common workflows include validation, quick conversion, and cleanup for API payloads, docs, spreadsheets, and operational data.