Software · regex101.com
regex101
Test and understand regular expressions
About this service
Highlighted matches and pattern explanations help you find mistakes.
What you can do
- Expression testing
- Pattern explanations
- Test strings
Things to know
- Mobile support has not been independently checked.
- You can test expressions and create a shareable link without signing in. Pro adds extended debugging and more test inputs.
Address checked: Oct 27, 2026 · Verification source