Test String with Regex
Check whether a regular expression matches each line of text and see the matches.
FreeNo uploadNo sign-up
Loading the tool…
How to use the Test String with Regex
- Type or paste your input into the Input box, or upload a text file.
- Adjust the options under the tool. The result updates as you type.
- Copy the output or download it as a file.
Private by design
The Test String with Regex runs entirely in your web browser. Nothing you enter or open here is uploaded to a server, so it is safe to use with private data and works even when your connection drops after the page has loaded.
Frequently asked questions
Is the Test String with Regex free?
Yes. The Test String with Regex on Codegres.org is completely free, with no sign-up, no limits and no watermark.
Is my string uploaded anywhere?
No. The Test String with Regex runs entirely in your browser using JavaScript, so your string never leaves your device and is not stored or seen by anyone.
Does the Test String with Regex work on my phone?
Yes. It works in any modern browser on Android, iPhone, Windows, Mac and Linux, with nothing to install.