devops tool
Regex Tester
Enter a regex on the first line and sample text below to see matches.
Paste data here. It stays in your browser.
Copy-ready result appears here.
How it works
- Compiles the first line as a JavaScript RegExp.
- Runs it globally and multiline.
- Lists matched strings.
Common use cases
- Debug validation rules.
- Extract log patterns.
- Test rewrite rules.
Code example
new RegExp(pattern, 'gm').test(text)JavaScript regex behavior
The tester uses JavaScript regular expressions with global and multiline flags. Other engines may behave differently.
Keep patterns maintainable
If a regex is hard to explain, add comments near the production rule or consider a parser-based approach.
FAQ
Is my input uploaded?
No. This MVP runs tool logic in your browser and does not send tool input to a server.
Can I use this on mobile?
Yes. Pages are mobile-first and designed for quick copy, paste, and share workflows.
Does the tool store history?
No. The MVP does not store tool input history or create user accounts.
Should I verify important output?
Yes. These tools are designed for productivity, but production changes and financial decisions should be independently verified.
Can the tool run after the page loads?
Yes. The interactive logic runs in the browser once the static page and JavaScript island are loaded.
What input format should I use?
Use the examples on the page as a starting point, then replace them with your own local input.