What this tool does

Test regular expressions with flags. It works fully client‑side — your files never leave the browser.

How to use

1. Click “Choose file” (or paste text/data).
2. Adjust settings (if any) and click “Continue”.
3. Click “Download” to save the result.

Why use it

• Instant, no installs.
• Privacy‑friendly: local processing.
• Works on mobile and desktop.

FAQ

Is it free? Yes, free to use. Ads help keep it running.

Are files uploaded? No, everything runs in your browser.

Big files? Depends on your device; up to ~20–50 MB is typical.