Test and debug regular expressions live with instant match highlighting. Supports all JS regex flags, named capture groups, match list and global/multiline modes. Free.
Built for real developer workflows. No fluff, just the tools you need.
Every match is highlighted in yellow instantly as you type the pattern. See exactly what your regex matches in real time.
Toggle g (global), i (case-insensitive), m (multiline) and s (dot-all) flags with dedicated buttons. Combine any flags.
All individual matches are listed below the highlighted output — numbered, easy to copy, great for extracting data.
Invalid patterns show a clear error message. Valid patterns show a green tick — no ambiguity.
Matching runs synchronously in the browser. Results update as you type with no debounce delay.
Your test strings and patterns never leave your browser. Safe for testing against private data or confidential content.
Get results in seconds — no account, no file upload required.
Type your regular expression in the pattern field. Toggle flags (g, i, m, s) with the buttons.
Enter the text to match against in the left panel. Matches highlight immediately on the right.
The status bar shows the match count. All individual matches are listed with their position numbers below.
Every tool at itsseven is free, private and browser-based.