Regex Tester Online
Paste a pattern and sample text to see live matches, groups and highlights. Built for developers and IT who cannot paste production logs into random SaaS regex sites.
Regex tester online — private, no upload
Developers and IT teams paste logs, emails and API payloads into regex testers all day. Many “free” sites send your sample text to a server. This one runs RegExp in your browser—safe for tokens, PII and internal hostnames.
- Live match highlighting and capture groups.
- Presets for email, URL, IPv4, UUID, ISO date, hex color.
- Flags g i m s u — same as JavaScript RegExp.
سؤالات متداول
Is my test string uploaded?
No. Matching uses the browser RegExp engine only. Check the Network tab while testing.
Which flavor of regex is this?
JavaScript / ECMAScript RegExp (same as Chrome, Firefox, Node). Flags: g i m s u.
Do you have common presets?
Yes—email, URL, IPv4, UUID, ISO date and hex color patterns.
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