Regex Validator
Checks whether a regular expression pattern is syntactically valid.
Lilu Baba's Regex Validator checks your pattern against JavaScript's native regex engine and reports any syntax errors instantly.
How to use this tool
- Enter your regular expression pattern and any flags.
- It's checked instantly for valid JavaScript regex syntax.
FAQ
Regex Validator — frequently asked questions
No — this only checks syntax validity; use our Regex Tester to check actual matching behavior against sample text.
JavaScript's native regular expression syntax.