Regex Tester
Test regular expressions live.
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Private
Files never leave your browser.
Fast
Native client-side processing.
Free forever
No signup, no watermarks.
About Regex Tester
Test JavaScript regular expressions against text with live match highlighting and capture groups. Client-side.
Regex Tester runs entirely in your browser using Utilities technology. Your files are processed locally and never uploaded to a server — there is no cloud, no storage, and no account required. Nothing about your file is sent anywhere.