Developer Tools
Utilities for programmers and developers
JSON Formatter & Validator
Format, validate, and beautify JSON data with syntax highlighting.
Base64 Encode / Decode
Encode text to Base64 or decode Base64 strings back to text.
URL Encode / Decode
Encode or decode URL components and full URLs.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text.
Regex Tester
Test regular expressions with real-time matching and group highlighting.
Markdown Preview
Write Markdown and see a live rendered preview side by side.
CSS Gradient Generator
Create beautiful CSS linear and radial gradients with a visual editor.
Image to Base64 Converter
Convert images to Base64 data URI strings for embedding in HTML and CSS.
Diff Checker
Compare two texts side by side and highlight the differences line by line.
HTML Entity Encoder / Decoder
Encode special characters to HTML entities or decode entities back to text.
JWT Decoder
Decode and inspect JSON Web Tokens - view header, payload, and expiration status.