Developer Tools
Formatters, encoders and testers for developers and technical users.
6 free tools · 100% in your browser
JSON Formatter & Validator
Format, beautify, minify and validate JSON with clear error messages.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text.
Regex Tester
Test regular expressions against sample text with live match highlighting.
Markdown to HTML Converter
Convert Markdown into clean HTML with a live preview.
Invoice Generator
Create a professional invoice and download it as a PDF.
Grammar Checker
Check your writing for grammar, spelling and style mistakes.