Regex Tester
Online regex testing tool supporting real-time matching, highlighting, group extraction, and replacement testing. Supports PCRE/JavaScript syntax.
Instructions
How to Use\n1. Enter a regular expression\n2. Choose match flags (g/i/m/s)\n3. Paste content in the test area\n4. View matches and highlights in real time\n5. Test replacement in the replace area
❓ FAQ
Which regex syntax is supported?
Both PCRE (PHP) and JavaScript regex modes are supported and freely switchable.
Which flags are supported?
g (global), i (case-insensitive), m (multiline), s (dotAll) and other common flags.
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