Developer Tools
Essential utilities for developers and programmers.
A curated collection of essential utilities for software developers and engineers. Format and validate JSON, encode and decode Base64 and URLs, generate UUIDs, test regular expressions, decode JWTs, and minify HTML — all without leaving your browser. These tools are designed for speed and privacy: your code and data are processed locally and never sent to any server.
JSON Formatter
Format, beautify, validate and convert JSON data with syntax highlighting, tree view, and auto-fix.
Base64 Encoder / Decoder
Encode text to Base64 format or decode from it.
URL Encoder / Decoder
Safely encode URL components or decode URL-encoded strings.
UUID / GUID Generator
Generate random UUIDs (Universally Unique Identifiers) instantly.
HTML Minifier
Compress HTML code by removing whitespace and comments.
JWT Decoder
Decode JSON Web Tokens and view header and payload data.
Mermaid Diagram Converter
Render Mermaid diagram code into downloadable PNG or SVG images.
Unit Converter
Convert between all units: length, weight, temperature, data, speed, time, volume, and more.
Color Code Converter
Convert and pick colors between HEX, RGB, HSL, and CMYK formats.
Regex Tester
Test and debug regular expressions in real-time with match highlighting.
Chmod Calculator
Visually calculate Linux file permissions and generate the chmod command.
Markdown Table Generator
Build markdown tables visually with alignment, CSV import, and live preview.
Code Share
Share code snippets online with syntax highlighting and short URLs.
URL Shortener
Shorten long URLs into clean, shareable short links with QR codes.