How to use this tool
Enter a pattern without surrounding slashes and choose JavaScript regex flags. Matches include their UTF-16 offsets.
A quick example
\b\w{4}\b matches mint at index 7.
Supported formats & limitations
Runs in an isolated worker cancelled after 500 ms. Maximum text 100,000 characters, pattern 1,000 characters and 1,000 matches. The current browser determines supported flags.
Does this tool upload my input?
No. Tool processing happens in your browser. Your input and result are not automatically saved. The host may still receive ordinary page access logs.Read about privacy.