Developer Tools
Essential tools for software developers — format code, decode tokens, test patterns, and more. All tools run entirely in your browser with no data sent to any server.
JSON Formatter
Format, validate, and minify JSON with syntax highlighting
JSON Diff
Compare two JSON objects and see structural differences highlighted
JWT Decoder
Decode and inspect JSON Web Token headers and payloads
Regex Tester
Test regular expressions with real-time match highlighting
Cron Expression Parser
Parse cron expressions into plain English with next run times
Chmod Calculator
Calculate Linux file permissions with visual editor and octal/symbolic conversion
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes
UUID Generator
Generate random UUIDs (v4) with one click
Password Generator
Generate strong, secure random passwords with customizable length and character options.
QR Code Generator
Generate QR codes for URLs, text, WiFi, and more. Download as PNG.
IP Address Lookup
Find your public IP and look up geolocation for any IP address.
JSON Validator
Validate JSON data with detailed error messages, line numbers, and syntax highlighting.
CSS Box Shadow Generator
Generate CSS box-shadow with a visual editor. Preview in real-time, copy the CSS code.
CSS Gradient Generator
Create beautiful CSS gradients with a visual editor. Linear, radial, and conic gradients with real-time preview.