Developer Tools
18 free tools available
Format, validate, and transform code like a pro. Free developer tools: JSON formatter, SQL formatter, regex tester, JWT decoder, CSS & JS minifier, cron generator, and diff checker.
All Developer Tools
Performance Budget Calculator
Set performance budgets for your website. Calculate resource limits, generate Lighthouse configs, and optimize page speed with actionable insights.
JSON Formatter
JSON formatter and validator online. Beautify, validate, minify and pretty print JSON data with syntax highlighting. JSON beautifier, free JSON checker.
Hash Generator
Hash generator online. Calculate MD5, SHA-1, SHA-256, SHA-512 hashes from any text. SHA256 hash generator, MD5 hash generator, checksum calculator, free.
JSON to CSV Converter
Free JSON to CSV converter online. Transform JSON data into CSV format for spreadsheets. Flatten nested JSON, custom delimiters, instant download. No signup required.
JSON to YAML Converter
Free JSON to YAML converter online. Transform JSON data into YAML format instantly. Supports nested structures, proper indentation. No signup required.
SQL Formatter
Free SQL formatter online. Beautify and format SQL queries with proper indentation and syntax highlighting. Supports MySQL, PostgreSQL, SQL Server. No signup.
Regex Tester
Free regex tester online. Test and debug regular expressions with real-time matching, highlighting, and group capture. Regex cheat sheet included. No signup required.
Markdown to HTML
Free Markdown to HTML converter online. Convert Markdown text to HTML code instantly. Supports GitHub Flavored Markdown, tables, code blocks. No signup required.
CSS Minifier
Free CSS minifier online. Compress and minify CSS code to reduce file size. Remove comments, whitespace, and optimize selectors. Instant results. No signup.
JS Minifier
Free JavaScript minifier online. Compress and minify JS code to reduce file size. Remove comments, whitespace, and optimize code. Instant results. No signup.
JWT Decoder
Free JWT decoder online. Decode and inspect JSON Web Tokens (JWT). View header, payload, and signature. Verify token expiration. No signup required.
Cron Expression Generator
Free cron expression generator online. Create and validate cron expressions with an easy visual builder. See next run times, human-readable descriptions. No signup.
Diff Checker
Free diff checker online. Compare two texts and highlight differences. Side-by-side diff view, inline diff, and unified diff. Find changes between files. No signup.
Regex Generator
Generate regular expressions from plain English descriptions. Build regex visually with pattern builder, test against sample text, and get explanations. Free.
JSON to TypeScript Converter
Convert JSON data to TypeScript interfaces and types instantly. Generate clean types from JSON with proper nesting, optional fields, and union types. Free.
HTML to JSX Converter
Convert HTML to React JSX instantly. Transform class to className, style strings to objects, event handlers, and self-closing tags. Paste and convert. Free.
JSON to Go Converter
Convert JSON data to Go structs instantly. Generate clean Go struct definitions with proper types, tags, and nested structs. Free, no signup required.
JSON to Python Converter
Convert JSON data to Python dataclasses, Pydantic models, or TypedDicts. Generate clean Python types with proper annotations. Free, no signup required.