Dzzz

Regex tester On-device

Pattern, flags, test text — matches, groups and export for JS, Python, Go.

Export for
Input 0 chars · 0 words · 0 lines
Output

Paste on the left to start.

Paste above to start.

matches.txt

Everything runs on your device. Nothing you paste is sent anywhere, and it's cleared when you close the tab.

Pattern, flags, test text — matches, groups and export for JS, Python, Go. Everything runs in your browser; nothing you paste is sent anywhere.

By Dzzz AI Updated

About this tool

What you provide

  • A pattern, flags and test text.

What you get

  • Matches, groups, replaced text and JS, Python or Go code.

Limits

  • Uses the browser's JavaScript engine; other flavours are approximated.

How to use it

  1. Enter a pattern

    Type the pattern and choose flags.

  2. Paste test text

    Matches highlight as you type.

  3. Copy or export

    Copy matches or export code for JS, Python or Go.

Frequently asked questions

Which regex flavour does it test?

The JavaScript engine in your browser. The export tab rewrites the pattern for Python and Go and warns about features they lack.

Does it work with Arabic?

Yes. Presets cover Arabic letters, tashkeel and Arabic-Indic digits, and the u flag enables Unicode property escapes.