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Test regular expressions with real-time match highlighting, flag toggles, and capture group display.
A browser-based regex playground. Type a pattern and test string to instantly see all matches highlighted. Toggle common flags (global, case-insensitive, multiline, dotAll), inspect capture groups, and view match indices — all without leaving your browser.
Visual gradient editor — pick colors, adjust stops, choose direction, and copy the CSS with one click.
Encode and decode URLs and individual components — supports full URL, component, and query-param modes.
Generate beautiful color schemes from any base color — complementary, analogous, triadic, and more.
Regex Tester is a free online tool available on BuildHub. Test regular expressions with real-time match highlighting, flag toggles, and capture group display.
This tool is designed for developers, engineers, and technical professionals who want to speed up their daily coding tasks. It runs entirely in your browser — no downloads, no sign-ups, and no data sent to external servers.
Whether you're working on a quick personal project or a professional deliverable, Regex Tester helps you get results faster with zero friction.
Yes, 100% free with no hidden costs. You don't need to create an account or provide payment information. Just open the tool and start using it.
Absolutely. Regex Tester processes everything directly in your browser. Your input data is never uploaded to our servers or stored anywhere.
Yes. The tool is fully responsive and works on smartphones, tablets, and desktop browsers. No app installation required.