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About Regex Find & Replace
Regex Find & Replace — free, private, browser-based text tool
Full JavaScript regex with capture groups, flags, and replacement patterns. It runs in your browser, so the file is processed on your own device.
Why use Regex Find & Replace
- ·Files stay on your device — nothing is uploaded
- ·No signup needed
- ·Works in any modern browser, on any OS
- ·Free daily use; Pro removes limits and watermarks
How to use it
- 1Drop a text file on the page, or click to choose one.
- 2Pick the options you want.
- 3Copy or save the result.
What Regex Find & Replace does
Full JavaScript regex with capture groups, flags, and replacement patterns.
How it works
Native browser performance via TextDecoder streams; regex execution uses the engine's optimized matcher; no payload size limits. The processing code runs inside the page, so your file is not uploaded to a server — you can confirm this in your browser's DevTools → Network tab.
Frequently asked questions
Does Regex Find & Replace upload my files?+
No. Regex Find & Replace runs in your browser and processes the file on your device. Nothing is sent to our servers.
Is Regex Find & Replace free?+
Yes, with a daily free allowance and no signup. Xonvert Pro ($4.99/month) removes the daily limits and the watermark on exported files.
Do I need to install anything?+
No. It works in any modern browser on Windows, macOS, Linux, ChromeOS, Android and iPad.
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