DeveloperRuns locally · No upload

Regex Tester

Test JavaScript regular expressions against sample text with live results. Supports flags (global, case-insensitive, multiline, dotall) and shows all matches.

Private by design

Everything runs in your browser. Your input is never uploaded, stored, or logged on our servers.

Works offline after load

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Frequently asked questions

Which regex flavor is used?+

JavaScript regular expressions (ECMAScript). Syntax matches what you use in Node.js and browser JavaScript.

Is this tool free?+

Yes. Every Utiliio utility is free with no sign-up, usage limits, or paywalls.

Do you store my data?+

No. Processing happens entirely in your browser. Your input never leaves your device.

Can I use this tool offline?+

Yes. Once the page loads, most tools continue working without an internet connection.