Developer Tools
Privacy-first developer utilities. Run regular expression tests, parse query strings, format metadata, or consult lookup reference tables.
Regex Tester & Explainer
Test, analyze, and validate regular expressions with live match highlighting.
URL Parser & Query Builder
Deconstruct URLs and build query strings with editable key-value pairs.
User Agent Parser
Analyze your browser user-agent or parse custom UA strings.
Meta Tag & OG Generator
Generate standard and Open Graph meta tags for website SEO optimization.
robots.txt Generator
Create search-crawler ready robots.txt configurations.
HTTP Status Codes
Quick search reference table of standard HTTP status codes.
MIME Types Reference
Searchable database of file extensions and MIME headers.
ASCII Table Chart
Complete reference chart of standard ASCII characters and representations.
HTML Entities Reference
Searchable index of special characters and HTML codes.
Git Command Reference
Common Git commands cheat sheet with explanations.
Linux Command Reference
Searchable cheat sheet of common Linux terminal commands.
Common Keyboard Shortcuts
Reference guide of essential keyboard shortcuts for developers.
Keycode Tester
Press any key to see its KeyboardEvent key, code, and keyCode values.
Viewport & DPR Detector
Show your current viewport size, device pixel ratio, and screen dimensions.
More coming soon
We are building new browser-based tools every week.