Regex tester
Try a pattern, see matches live
Test a regular expression against your own sample text and see every match, capture group and count update live. Debug a pattern for JavaScript, or any regex flavour that shares the syntax.
How it works
- Open the tool and add your file (or paste your text).
- Adjust the options — everything previews instantly.
- Download the result. Done.
Private by design
This tool runs 100% in your browser. Your files are never uploaded to a server, never stored, and never seen by anyone — close the tab and nothing remains.
Free, no limits
No account, no watermarks, no daily caps. If you also need full design tools, the Ijodly editor is one click away.
Frequently asked questions
Is Regex tester free to use?
Yes — Regex tester is completely free. There is no account to create, no watermark on your results and no daily limits.
Are my files uploaded when I use Regex tester?
No. Regex tester runs entirely in your browser. Your files never leave your device and nothing is stored on a server — close the tab and nothing remains.
Do I need to install anything or sign up?
Neither. Open the page, use Regex tester straight away and download your result. No install, no signup.