Regex Tester
Test a regular expression against any text, see every match highlighted live and inspect capture groups. Powered by your browser's own regex engine.
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What watches these brands watches your clients too
End the manual growth tax.
Running checks by hand eats valuable agency time. Uptimeify monitors your entire client portfolio from one place: on a fair, organization-wide quota model, on secure EU infrastructure. No per-client fees, no surprises.
Frequently asked questions about Regex Tester
It uses your browser's native JavaScript (ECMAScript) regex engine, so behaviour matches exactly what runs in Node.js and the browser. Toggle the standard flags, g (global), i (ignore case), m (multiline), s (dotall), u (unicode), y (sticky), and named capture groups are supported too.
No. Matching happens entirely in your browser, nothing is sent to a server. As an EU-built, EU-hosted provider, Uptimeify keeps your workflow off US infrastructure and clear of US Cloud Act exposure, which matters for agencies handling client data under GDPR.
Keyword and content checks use patterns to confirm a page or API response contains exactly what it should. Build and verify the expression here, then drop it into an Uptimeify content check, and get alerted the moment the match breaks.
Ready to Run Your Pattern Against the Live Page?
Here you test against sample text. Uptimeify checks on an interval whether the expected content is actually on the live page, and alerts you when it isn't.