Omnipus

Regular expression tester

Runs on your deviceFreeNo account

How to use Regex tester

Enter a pattern without slashes, set flags (g, i, m, s, u), and paste test text. Matches highlight in the sample. Use this to debug validators, search-and-replace, and log parsers. JavaScript regex syntax only.

1

Open the tool

Use the workspace below — no signup is required.

2

Enter your input

Enter a pattern without slashes, set flags (g, i, m, s, u), and paste test text. Matches highlight in the sample. Use this to debug validators, search-and-replace, and log parsers. JavaScript regex syntax only.

3

Copy the result

Copy text or download a file when the tool offers an export. Local tools keep processing in this tab.

Direct share: Install Omnipus as an app on Android to share files and links into this tool from other apps.

About this tool

Write a pattern, toggle flags, and see matches highlighted. Groups are listed under the sample. Invalid patterns show the engine error instead of failing silently.

#regex tester#regular expression#regexp

Related guides

Frequently Asked Questions

PCRE vs JavaScript?

This is the browser’s JS engine. Lookbehind works in modern browsers; some PCRE verbs do not.

Catastrophic backtracking?

Evil patterns can freeze the tab. Keep tests small while experimenting.

Replace?

A replace field shows the substitution result with captured groups.

Is Regex tester completely free to use?

Yes. Regex tester on Omnipus is free to use with no subscription paywall for the tool itself.

Are my files or data uploaded to any servers?

No. Regex tester processes your input locally in this browser tab. Your files and text are not sent to Omnipus. Some tools download an engine or model file the first time you use them; that is a download, not an upload.

Can I use Regex tester on my mobile phone?

Yes. Omnipus has touch-friendly controls and can be installed as an app. On Android you can also share files or links into tools from other apps.

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