Regex Tester

Test regular expressions against sample text live.

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How to use Regex Tester

Three quick steps — no sign-up needed

  1. Step 1

    Paste your content

    Paste or type your text into Regex Tester — it runs in your browser.

  2. Step 2

    Run the tool

    Set any options and process instantly, with no uploads or waiting.

  3. Step 3

    Copy your output

    Copy the result to your clipboard, ready to use anywhere.

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About Regex Tester

Regex Tester is a free online tool that lets you test regular expressions against sample text live — straight from your browser, with no software to install, no sign-up, and no watermarks. It runs on Windows, Mac, Linux, Android, and iOS, so you can use it on whatever device you happen to have to hand.

Regex Tester is built to make developer tasks quick and painless, with a clean interface that anyone can use straight away. Files and data are processed securely and removed automatically afterwards, and many steps run entirely on your own device for extra privacy. Because Regex Tester is completely free and unlimited, you can use it as often as you need for work, study, or personal projects.

Benefits of Regex Tester

Test as you type See your pattern match against sample text in real time.
Highlighted matches Matches are highlighted so you can refine your expression fast.
Runs in your browser Your patterns and text stay private.
Free & unlimited Test as many expressions as you like.

Frequently asked questions

How do I use Regex Tester?

Open Regex Tester, follow the simple steps on the page, and get your result in seconds — everything happens online in your browser.

What can I use Regex Tester for?

Test regular expressions against sample text live for work, study or personal projects — Regex Tester is built to make developer tasks quick and painless.

Does Regex Tester work on mobile?

Yes. Regex Tester runs in any modern browser, so it works the same on phones, tablets and computers with nothing to install.