RegEx Lab - test regular expressions

• Highlighting of regex syntax and of matches and capture groups.
• Results List View which lists all the matches and capture groups.
• Replace feature
• Dark theme (by default) based on the Solarized colour palette
• Themes to chose from (light/dark)
• A handy cheatsheet which tells you about the different operators, option flags and metacharacters.
• An extra row of keyboard keys for common special charachters
• Undo / Redo quick access buttons
• You can adjust the text size easily within the app.
• Works perfectly with iOS Multitasking - in Split View or as a Slide Over app.
• Completely free, no ads.

Questions, suggestions, issues?

Made by Nikolay Suvandzhiev

What’s New

Version 1.4.0

• Named capture groups
By popular demand - added (experimental) support for named capture groups. The native implementation by iOS is limited, so some workarounds are used and things might not work in all cases. If you notice issues, you can provide feedback via the Feedback menu.

If you like RegEx Lab, please take a moment to rate or review - thanks!

Ratings and Reviews

4.8 out of 5
38 Ratings

38 Ratings

Virgil89 ,

Fantastic tool to have in hand

While I am not a pro using RegEx, I quick test on this App before writing something on my computer. It’s easier and faster rather than run the script every time. And since I (sadly) live with my phone next to me it has just become a fun pass time even if I don’t need to them... By doing (rather than reading the theory) you learn so much more and if you are like me that has just started with RegEx, having an app like this will help you in the process of getting your feet wet! Highly recommended

Developer Response ,

Thank you very much for your review. I am glad to hear that RegEx Lab is helping you to learn about regular expressions (it's a very useful skill to have!). For any suggestions, just let me know (from the app: Settings > Contact Developer).

big_deeb ,

The best regex editor hands down

This app is a must if you need to whip up a regular expression without wasting time. It allows you to easily craft a collection of regex’s of varying techniques with individual sample source data. The developer is very responsive and generous to give this tool away for free.

Developer Response ,

Thanks for using the app and for your feedback!

briansilva ,

Very Useful!

This app does exactly what it says, and does it well. Beautiful clean design. The live highlighting of group matches in arbitrary text is awesome. And I very much appreciate the integrated documentation/cheatsheet. Definitely recommend this app!

Developer Response ,

Thank you very much for your review and recommendation! It's always great to hear from users that they've found RegEx Lab useful.


Sovio Limited
26.5 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2018 Sovio Ltd.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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