By Team Hypomnema · Developer
Test JavaScript patterns and inspect match positions and capture groups.
Use the guide alongside the working tool.
Open Regular Expression Tester →Working input
Contact alex@example.com or sam@example.orgTest JavaScript patterns and inspect match positions and capture groups. Uses JavaScript RegExp syntax. Runs in a disposable worker with a timeout; no PCRE compatibility claim. Up to 2,000 matches.
Input and purpose
Test JavaScript patterns and inspect match positions and capture groups.
Start with the working sample, then replace it with your own input. The sample input is: Contact alex@example.com or sam@example.org
Review the result
Uses JavaScript RegExp syntax. Runs in a disposable worker with a timeout; no PCRE compatibility claim. Up to 2,000 matches.
Run processes the current input on your device. Changing an input clears the previous output so you cannot accidentally export stale results.
Copy and export
Copy or download only after reviewing the exact generated text. Nothing is applied to your project or sent to an endpoint.
Use Undo sample to restore your draft. Clear inputs or close the tab when finished; no content is stored in localStorage.
Ready to apply this workflow?
Try Regular Expression Tester →Explore a related workflow
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Keep your original files and review the result. Found unclear instructions? Contact Team Hypomnema.