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 color palette
• Themes to choose 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 characters
• Undo / Redo quick access buttons
• Support for Dynamic Type (iOS Settings Text Size)
• Works perfectly with iOS Multitasking - in Split View or as a Slide Over app.
• Export / Import feature

Questions, suggestions, issues?

Made by Nikolay Suvandzhiev

What’s New

Version 1.9.0

• There's now a "Share" button (under regex options) so you can quickly share your regex (along with any flags, test text and replacement text). Thanks to the user who suggested this feature.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

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).

Beavertonian ,

Where Is the Cheat Sheet?

Feb 17: After using it some more increasing it to 4 stars. Would like to have the replace window and visible simultaneously with scanned text but maybe that is possible too and I haven't found it yet.

Rating: 1 star.
Am I dumb or what? The one thing I wanted was the cheat sheet to use to better learn about regular expressions. In the App Store they claim to have to have one but I can’t find it.
Ok, I found it. Increasing rating to 4 until I decide if it is useful. On a second visit I couldn’t find it again! Finally! The cheat sheet should be accessible from any page of the app. This is a crap tool for learning regexes. Decreasing rating to 3.
The “light/dark” highlighting is terrible. Looking for a way to turn that off. No luck so far. OK, I got control of the dang “theme”. Still a pain in the neck.
I don’t get it. I was seeing a keyboard with an extra row with meta characters; very nice. Now it is gone, and I can’t get it back. But I do have access to emojis. How useless!
A complete mess. Lowering to 2 stars. Needs a user manual.

Developer Response ,

Thank you for trying out the app and for your feedback. I’m glad you found the features you were looking for in the end. RegEx Lab is an app for testing regular expressions and in its current version it’s not designed as a learning tool, which is what you seem to have expected. There are many great resources online for learning regex, which I recommend checking out. As for your comments that things are hard to figure out in the app and the UI is confusing - I will continuously work on improving the user experience and making it more intuitive. Thanks.

T_L_G ,

Great, full-featured regex tool

I wanted to test a regex but didn’t want to connect to work to get a Linux window. Downloaded this app and voila. You can write your regex and write your data, both of which you can save, and it highlights the matches or does the replacements. It’s got examples and reference information. Font size is adjustable.

Developer Response ,

Thank you for using the app and for your rating and review!

App Privacy

The developer, sovio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

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

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