Regex Tester
Test regex patterns instantly in-browser with no uploads, no logging, and immediate match feedback.
Regex Tester
Try a pattern against sample text, inspect the match list, and tweak flags without leaving the browser.
Ctrl+Enter Test Groups and indexes Global flag aware
Sample text Editable input
1 line | 0 chars
Matches Read only output
0 matches
Ready Local execution
Enter a pattern, optional flags, and some sample text to inspect matches and capture groups.
How ZeroData protects your privacy
- ✓ No Uploads: Processing happens entirely via client-side JavaScript.
- ✓ No Storage: We do not have a database. We physically cannot save your data.
- ✓ No Tracking: We don't log what you process or track your inputs.
- ✓ Verifiable: Check your DevTools Network tab. You will see 0 outbound requests.
How to Use the Regex Tester
- Enter a regex pattern and optional flags such as g or i.
- Paste or type sample text into the left editor.
- Run Test regex to inspect all matches and capture groups.
- Copy the result JSON if you need to share the match details.
Frequently Asked Questions
Can I test global matches?
Yes. Add the g flag and the tool will list every match in the sample text.
Does it show capture groups?
Yes. Each match entry includes the captured groups array.
Is the test text uploaded?
No. Pattern compilation and matching happen locally in the browser.
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