Developer
Regular Expression Tester
Build and test regex patterns locally with match counts, indexes, and captured groups.
Output
Results will appear here.
Why Use It
Small developer tasks, handled locally.
Decode, format, generate, and inspect common developer data without opening a heavy IDE or sending sensitive snippets to a server.
Local
browser utilities
Text
copy-ready output
Private
no server upload
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FAQ
Questions, answered.
Which regex engine is used? +
VizionKit uses the JavaScript RegExp engine available in your browser.
Can I use flags? +
Yes. You can use JavaScript flags such as g, i, m, s, u, and y.
Is the test text uploaded? +
No. Regex testing runs locally in the browser.