Developer Tools
A focused set of tools to speed up debugging, testing, and everyday development tasks.
Box Shadow Generator
Visual CSS box-shadow generator
Chmod Calculator
Easily calculate Unix file permissions
Cron Expression Parser
Translate complex cron expressions into human-readable time
CSS Filter Generator
Generate CSS image filters. Adjust blur, brightness, contrast, and more
HTTP Status Code Reference
Searchable reference guide for all HTTP status codes
JWT Decoder
Decode and inspect JSON Web Tokens in your browser
JWT Encoder
Create and encode JSON Web Tokens directly in your browser
RegEx Tester
Test and debug JavaScript regex patterns with live match highlighting
Screen Info
Check your screen resolution, viewport size, DPR, and device details instantly.
String Escaper
Escape strings for JavaScript, JSON, HTML, SQL and CSV
Unicode Inspector
Inspect Unicode characters, code points, UTF-8 bytes, and encodings.
URL Builder & Query String Generator
Build and encode URLs with query parameters.
User Agent Parser
Parse user agent strings into browser, OS, and device.
Other tools
View other tools from different categories