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Test JavaScript regular expressions in real time. Highlight matches, inspect capture groups, and pick from a library of common patterns.
Enter a regex pattern above and a test string to see matches highlighted in real time.
Everything you need to write, test, and debug regex patterns — in your browser.
Matches update instantly as you type — no submit button needed. See results the moment you type a character.
All matches are highlighted inline in your test string so you can see exactly what is captured.
Capture group values shown in a structured table for each match — great for extraction workflows.
Toggle global, case-insensitive, and multiline flags with one click and watch results update instantly.
Six common patterns ready to insert — Email, URL, Phone, IP, Date, and Hex Color — with one click.
All matching runs entirely in your browser using the native JS RegExp engine. Nothing leaves your device.
JavaScript regex (ECMAScript). Patterns run entirely in your browser using the native JS RegExp engine.
Common causes: unescaped special characters (wrap them with backslash), unmatched brackets or parentheses, or invalid flags.
No. All matching runs 100% in your browser. Nothing is sent to our servers.
From data pipelines to API validation — we help teams ship reliable, production-grade software.
Disclaimer: This tool is provided for informational and educational purposes only. Preview renderings are approximations and may differ from actual platform displays due to platform updates, caching, or rendering differences. We fetch publicly available metadata and do not store or share your URLs. Platforms may cache old data even after you update your content—use their official debug tools to refresh caches. ZIRA Software is not liable for any decisions made based on this tool's output.