Regex Tester Online Free
Test regular expressions online with real-time matching.
//g
Files never uploadedInstant results100% freeWorks on mobile
How to Use
- 1Enter your regular expression pattern in the pattern field.
- 2Toggle the flags (g, i, m, s) as needed for your use case.
- 3Type or paste your test string and see matches highlighted in real time.
Frequently Asked Questions
What regex syntax is supported?
This tool supports standard JavaScript regex syntax including character classes, quantifiers, groups, lookaheads, and more.
What do the flags mean?
g = global (find all matches), i = case-insensitive, m = multiline (^ and $ match line boundaries), s = dotAll (. matches newlines).
Is my data sent to a server?
No. All regex testing happens locally in your browser. Your patterns and test strings never leave your device.
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