Free Online Developer Tools
18 toolsEveryday utilities for developers: format and validate JSON and XML, encode Base64, hash with bcrypt, decode JWTs, generate UUIDs and convert between CSV and JSON.
Because everything runs client-side, it is safe to paste API keys, tokens and production data. Also available through our REST API and MCP server.
JSON Formatter
NEWFormat, validate, and minify JSON with syntax highlighting.
Base64 Encoder
NEWEncode and decode text or files to and from Base64.
Hash Generator
NEWGenerate SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly.
URL Encoder
NEWEncode and decode URL components for safe transmission.
Color Converter
NEWConvert colors between HEX, RGB, and HSL formats with live preview.
Case Converter
NEWConvert text to UPPERCASE, lowercase, camelCase, snake_case, and more.
Lorem Ipsum Generator
NEWGenerate placeholder text for paragraphs, sentences, or words.
Markdown Previewer
NEWWrite and preview Markdown in a live split-screen editor.
Regex Tester
NEWTest and debug regular expressions with live match highlighting.
Diff Checker
NEWCompare two blocks of text and highlight the differences.
CSS Gradient Generator
NEWCreate and preview beautiful CSS gradients easily.
SVG Optimizer
NEWClean and compress SVG files by removing unnecessary code.
JSON to CSV
NEWConvert JSON arrays or objects into CSV format instantly.
JWT Decoder
NEWDecode JSON Web Tokens locally without sending them to a server.
XML Formatter
NEWFormat and beautify raw XML code into a readable structure.
UUID Generator
NEWGenerate standard v4 UUIDs/GUIDs in bulk.
CSV to JSON
NEWConvert CSV text or files into formatted JSON arrays.
Bcrypt Generator
NEWGenerate and verify Bcrypt hashes with custom salt rounds.