Developer Tools
Essential tools for software developers and programmers — 11 free tools
JSON Formatter
Format, validate and beautify JSON data instantly online.
Base64 Encoder / Decoder
Encode and decode text or files using Base64 encoding.
UUID Generator
Generate unique UUIDs (v1, v4) instantly for your projects.
JWT Decoder
Decode and inspect JSON Web Token (JWT) payloads.
URL Encoder / Decoder
Encode or decode URLs and query parameters.
HTML Encoder / Decoder
Encode special characters to HTML entities and back.
Regex Tester
Test and debug regular expressions with live matching.
Diff Checker
Compare two blocks of text and highlight the differences.
Markdown Editor
Write and edit Markdown with syntax highlighting. All processing happens in your browser.
Markdown to HTML Converter
Convert Markdown syntax into clean, sanitized HTML instantly in your browser. Supports GFM tables, task lists, code blocks, and more.
Cron Expression Generator
Build and validate cron expressions with a visual editor.