beRegExProfi
Learn & Understand Regex
Free
Learn and understand regular expressions. Plain-language explanation of every pattern part, live matches, catastrophic backtracking warnings. Fully offline, no ads.
beRegExProfi helps developers and IT professionals build, test, and above all understand regular expressions (regex). Unlike plain debugging tools that only show whether something matched, beRegExProfi explains every part of a pattern in plain language.
PATTERNS EXPLAINED IN PLAIN LANGUAGE
Every building block of a pattern – character class, group, quantifier, anchor – is explained individually in clear language, not just shown as a match or non-match.
LIVE MATCHES AND CAPTURE GROUPS
Matches in the test text are highlighted instantly on every keystroke, with navigation to the next/previous match. The contents of individual capture groups are listed separately.
PITFALLS AND BACKTRACKING WARNING
The app proactively flags known pitfalls (e.g. greedy vs. lazy quantifiers, unescaped special characters) – and additionally warns about patterns prone to catastrophic (exponential) backtracking, before they become a real-world problem.
SEARCH & REPLACE WITH LIVE PREVIEW
Enter a replacement pattern including group references ($1, ${name}) and see the result instantly as a preview, without confirming the input.
UNDERSTANDABLE ERROR MESSAGES
An invalid pattern gets a concrete, understandable hint instead of a raw, technical system message.
BUILT FOR IPAD AND MAC
Large controls, thoughtful keyboard shortcuts for macOS/iPadOS with a hardware keyboard (including a built-in overview), and full VoiceOver support.
NO CLUTTER
• No accounts, no cloud, no ads
• No internet connection required – all patterns and test texts stay on the device only
• Processing exclusively via Swift's own regex dialect
MULTILINGUAL
Fully usable in German, English, French, Spanish, and Portuguese – switchable right in Settings, independent of the system language.
beRegExProfi is designed for iPad and Mac.
Ratings & Reviews
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The developer, Sebastian Ritter, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Sebastian Ritter
- Size
- 2 MB
- Category
- Education
- Compatibility
Requires iPadOS 26.5 or later.
- iPad
Requires iPadOS 26.5 or later. - Mac
Requires macOS 26.0 or later. - Apple Vision
Requires visionOS 26.5 or later.
- iPad
- Languages
English and 7 more
- English, French, German, Hindi, Japanese, Portuguese, Simplified Chinese, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 Sebastian Ritter