RegEx Lab: Regular Expressions

RegEx Lab: Regular Expressions

Test regular expressions

170 ratings
60 reviews
#24 in paid Developer Tools
📚 Education
🛠️ Developer Tools
$1.99 $0.99

Lowest price: $0.99 2 years ago (-0%)


Price history


Details

  • Released
  • Updated
  • July 26, 2017
  • December 6, 2024
RegEx Lab: Regular Expressions screenshot #1 for iPhone
RegEx Lab: Regular Expressions screenshot #2 for iPhone
RegEx Lab: Regular Expressions screenshot #3 for iPhone
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ipad
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About

This app allows users to test and experiment with regular expressions. It offers syntax highlighting, customizable match colors, and a detailed results list. Features include a replace function, dark and light themes, and a helpful cheatsheet for quick reference.

Regex syntax highlighting
Match and capture group highlighting
Customizable highlight colors
Results list view
Replace feature
Dark and light themes
Regular expression cheatsheet
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What's New in RegEx Lab

1.16.2

December 6, 2024

• Fixed an issue when scrolling large amounts of text and the scroll position might end up inaccurate. Thanks to the user who reported this and provided steps and sample text to reproduce.

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Top Paid

📉 24-1

Developer Tools

This app dropped -1 position in Developer Tools chart.

Last updated on July 20, 2026.

User reviews

Really great one

Beautifully designed UI. Simple and easy to use. Get my regular expression things done in just a few seconds.

Where is the app and my files? All hidden files!! :(

I was really enjoying this app until I went to backup my Regex files I’ve created in it. The iPad’s Files app cannot find the app or my Regex files. Why make them hidden?! The export option makes a mess of them. If you select Export All you get a file that’s not html but is full of HTML codes and everything is in quotes. If I can’t backup my Regex expressions to iCloud, then the app is not saving me any time. Please make your app visible! AND all of my Regex files I’ve created in your app. I shouldn’t have to buy a Shell to go on an Easter Egg Hunt to find my work. Geesh!! :((
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Useful offline Regex tool

I wanted an offline Regexbuddy type of app on my iPad and RegEx Lab is a good option. It only supports the ICU Unicode flavor of Regex, at the moment. It’s been years since I retired and did any coding. This tool is helping me get back up to speed on Regex. Thanks for making this app!

**Essential** text tool for devs and writers

I use this every day. The **best** tool for developing and debugging scripts in Shortcuts, Scriptable, Pythonista and other automation apps. Excellent UI and workflow, simple to use yet comprehensive and powerful.

I Love It - That is All

💕💕💕

Developer apps

FAQ

What does RegEx Lab do?

RegEx Lab is a mobile application designed for testing and experimenting with regular expressions. It provides tools to highlight regex syntax, matches, and capture groups, making it easier to understand and debug your patterns.

What are the key features of RegEx Lab?

Key features include syntax highlighting for regex and matches, customizable highlight colors, a results list view, a replace function, multiple themes (including dark mode), an integrated cheatsheet, and support for dynamic text sizing.

Is RegEx Lab free to use?

Yes, RegEx Lab is a free application. It does not have any in-app purchases or advertisements, allowing for an uninterrupted user experience.

What platforms is RegEx Lab available on?

Based on the provided information, the app supports Dynamic Type, which is an iOS feature. This suggests it is available on iOS devices.

How can I use RegEx Lab to learn regular expressions?

The app's syntax highlighting and results list view help visualize how your regular expressions match text. The included cheatsheet provides quick access to common operators and metacharacters, making it a useful tool for both learning and applying regex concepts.