Regex tester

Test a regular expression against your text and see every match and capture group.

🔒 Everything runs in your browser. Nothing you choose or type is uploaded. How to verify

How to use it

1. Type your pattern without the slashes.
2. Add flags such as g or i, then paste the test text.
3. Read the matches, which update as you type.

Handy for

Debugging validation patterns and extracting data from text.

Good to know

Without the g flag only the first match is shown. Patterns with heavy backtracking can slow your tab, so test with short text first.

Privacy: where the work happens

Everything you enter or choose is processed by JavaScript in your browser and never sent anywhere. Only the page code, and any library this tool needs, is downloaded from cdnjs or jsDelivr.

Questions

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