Regex Tester RegEx · omikuji tools
Local processing only Runs in your browser

✨ Features

  • Real-time match highlighting
  • Capture group display
  • g/i/m/s/u flag support
  • Runs entirely in browser — no server involved

🪄 Ways to Use It

Debugging regex in code

Quickly validate regex patterns used in your code and confirm matches in real time.

Validating emails & phone numbers

Test form validation patterns and instantly verify whether inputs match the expected format.

Extracting data from text

Build and test patterns to extract specific information from log files or large text blobs.

Verifying pattern matching in code

Pre-validate patterns for grep, sed, awk, and similar tools right in your browser.

🔒 Privacy

All text you enter is processed entirely within your browser and never sent to any server. You can safely test text containing API keys or personal information.

❓ FAQ

Which flags are supported?

All five flags are supported: g (global), i (ignore case), m (multiline), s (dotAll), and u (unicode).

Are capture groups shown?

Yes. Capture groups are listed for each match, including named groups.

Can it handle large amounts of text?

Yes, processing is done in the browser, so it works within your browser's memory limits.

Can I save or share a pattern?

The pattern is included in the URL, so you can bookmark it or share it as a link.
/ /
No matches
Test string Test string
0
Paste logs or texthere
Matches are highlighted in real time. Nothing is sent externally — even if you paste sensitive data.
tools.omikuji.dev Fully local · No data sent · No auto-save
Ctrl/ to pattern ? cheatsheet
Terms of Service · Privacy Policy