Regex Tester
Test a JavaScript regular expression against text and see every match and group.
Matches
2
- @6 “#123” · groups: “123”
- @40 “#456” · groups: “456”
How it works
Runs in a background worker with a 1-second limit, so a runaway pattern can't freeze the page.
Questions
- How does the regex tester work?
- Runs in a background worker with a 1-second limit, so a runaway pattern can't freeze the page.
- Is my text sent to a server?
- No. The tool runs entirely in your browser; nothing you type is uploaded.
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