Everyday Web & Coding Utilities
Lightweight, instant developer utilities that run 100% in your browser. No server uploads, no rate limits, and zero login required.
Regex Tester & Matcher
Test regular expressions with real-time match highlighting, flag toggles, and common presets.
URL Parser & Query Inspector
Dissect URLs into protocol, host, port, path, and interactively edit query parameters.
Date Difference & Business Days
Calculate days, working business days, weekends, and date offsets with calendar precision.
HTTP Status Codes Lookup
Searchable database of all 1xx–5xx HTTP response codes with causes, RFC specs, and fixes.
MIME Types & File Extensions
Search file extensions, official MIME types, and Content-Type response headers.
Unix Timestamp Converter
Convert epoch timestamps in seconds and milliseconds to human-readable UTC and local time.
Cron Expression Explainer
5-field cron expression builder with English explanations and next 5 run schedules.
Built for Modern Engineers & Daily Debugging
From testing a complex regex without breaking your production build, to verifying an HTTP status code or understanding query parameters in an OAuth redirect URL, PicoFix gives software developers rapid, offline-capable tools that just work.
Frequently Asked Questions
Helpful answers to common image compression questions.