Regex Generator
Regex Generator — create common patterns quickly and safely.
- Runs in your browser
- Free, no signup
Enter a JavaScript regular expression without slash delimiters.
Choose a pattern to load its example.
Pattern checking runs locally in your browser. These patterns check format only; they do not verify accounts, registrations, ownership or whether a value is active.
Patterns and sample values are checked locally in your browser. Nothing is uploaded or stored.
The generator helps build common patterns without needing to memorise full regex syntax.
Each pattern is shown as a format example so it remains clear that the result is a structural check, not a guarantee that a value exists.
How to use this tool
- Pick a pattern type such as email or Indian mobile number.
- Generate the regex and copy it into the tester or another tool.
- Use the explanation to understand the exact format being checked.
Frequently asked questions
Are these patterns official validations?
No. They are format examples meant to match common structures, not live verification against an external database or service.
Can I use them in the tester?
Yes. Copy the pattern and paste it into the Regex Tester to validate it against sample text.