Free online developer tools for programmers, engineers, and web developers. Format JSON, encode and decode Base64, generate UUIDs, minify CSS, HTML and JavaScript, debug JWT tokens, test regular expressions, and much more — all from your browser with no installation required.
Key Features
- JSON Formatter — beautify, validate, and minify JSON data with syntax highlighting and error detection for quick debugging.
- Base64 Encode/Decode — convert text and binary data to and from Base64 encoding, essential for working with APIs, emails, and embedded assets.
- Color Converter — translate colors between HEX, RGB, HSL, and CMYK formats with a live preview swatch.
- UUID Generator — create universally unique identifiers (v4) for databases, APIs, and distributed systems.
- Password Generator — generate strong, cryptographically random passwords with customizable length and character sets.
- CSS, HTML & JS Minifiers — reduce file sizes by stripping whitespace, comments, and redundant code to speed up page loading times.
- MD5 Generator — compute MD5 hash checksums for file integrity verification and quick data comparison.
- JWT Debugger — decode and inspect JSON Web Tokens, view header and payload claims, and verify token structure.
- Regex Tester — write, test, and debug regular expressions with real-time matching, capture groups, and pattern explanations.
- Cron Parser — translate cron schedule expressions into human-readable descriptions and preview upcoming execution times.
- Unit Converter & Time Zone Converter — convert between measurement units and compare times across global time zones.
Who Uses These Tools
- Full-stack developers who debug JSON payloads, JWT tokens, and API responses every day.
- DevOps engineers scheduling cron jobs and generating secure passwords for infrastructure.
- Frontend developers minifying assets, converting colors, and testing regex patterns for form validation.
- Students learning to code who need quick utilities without complex setup.
Every developer tool works instantly in the browser — paste your data, get results, and copy them to your clipboard. Combine these with our text tools and network tools for a complete online development toolkit.