WORKS IN YOUR BROWSER
Free. No account needed.Regular Expression Tester
Test a bounded regular-expression subset without backtracking.
Result
Enter your values. Your result will appear here.
How it works
- Enter a pattern using literals, ., classes, ^/$ anchors, and ?, *, + or {n,m} repetition.
- Use g for all matches, i for ASCII case-insensitive matching, and m for line anchors.
Example & practical use
[A-Za-z]+ with g → Hello, world
What to know
Safe subset: no groups, alternation, backreferences, lookarounds, lazy quantifiers, word boundaries, or Unicode flags. Anchors only at the pattern edges. Pattern ≤300 code units; text ≤20,000; output ≤1,000 matches. Indices are UTF-16 offsets.
Are my files or inputs uploaded?
Image and text processing happens in your browser. Your files are not uploaded to our servers.
Found an issue?
We are improving this alpha release. Tell us the tool, your device and the expected result through the contact page. You do not need to share private inputs or original files. Contact