Test regex and flags
Enter a regular expression and flags to see how it behaves against your text.
Free. Private. No uploads.
Regex Tester
Test regular expressions against sample text without sending the pattern or content anywhere. Pocket Dev helps you check flags, matches and groups in a private browser workspace.
What it does
Test regex patterns before using them in code.
Regex Tester helps developers validate patterns against realistic sample text. Use it when checking form rules, parsing logs, matching identifiers or debugging capture groups.
Review matches and groups
Inspect matched values and capture groups before putting the pattern into code.
Worker timeout protection
Regex execution is handled away from the main UI so slow patterns can be stopped safely.
How to use
Use Regex Tester in a few steps.
- Open the Regex Tester tool inside Pocket Dev.
- Enter your regex pattern and flags.
- Paste sample text to test against.
- Review matches and capture groups before copying the pattern.
FAQ
Regex Tester questions
Is this regex tester free?
Yes. Pocket Tools is free to use.
Is my test text uploaded?
No. Regex testing happens locally in your browser.
Can it show capture groups?
Yes. The tool shows matches and captured groups when the pattern includes them.