---
title: "RegEx Knife - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "RegEx Knife is an easy and useful tool for working with Regular Expressions.  RegEx Knife is unique in how it allows you to highlight capture groups within a Regular Expression, edit them and immediat"
---

# RegEx Knife — United States

![RegEx Knife App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple114/v4/34/f1/0c/34f10cd2-1feb-af28-386b-53dddd50b632/AppIcon-1x_U007emarketing-0-5-0-85-220.png/400x400bb.png)

**Developer:** [Mark Alldritt](https://apptail.io/developer/mark-alldritt-lDBb)
**Category:** Utilities
**Rating:** 4.3/5 (25 ratings)
**Price:** Free
**Bundle ID:** com.latenightsw.RegExKnife
**Store:** Apple App Store
**Country:** United States
**Version:** 2.0.2 (released 2020-09-10)
**Original Release:** 2014-07-20

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id894169288)
**AppTail Page:** [https://apptail.io/app/regex-knife-mRXc/united-states](https://apptail.io/app/regex-knife-mRXc/united-states)

## RegEx Knife Description
RegEx Knife is an easy and useful tool for working with Regular Expressions.  RegEx Knife is unique in how it allows you to highlight capture groups within a Regular Expression, edit them and immediately see the results.  RegEx Knife also makes it easy to experiment with regular expression substitutions. 

Version 2 retains the simplicity of the original RegEx Knife, with the added advantage that it works on your iPhone as well as your iPad.

## RegEx Knife Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource114/v4/6f/81/11/6f8111c6-73e0-0158-f0cb-3e615e02d724/bf979325-03e2-41f7-bc73-03ebc9793359_1.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource114/v4/bc/95/0f/bc950f40-d9c7-dcc2-b1f7-77b5d43bf605/2653d855-0129-4879-833d-0343c496a7de_2.png/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource124/v4/67/9d/c2/679dc2e1-d8b7-b5c7-ba47-9a1a93c87ac1/d54ada45-645a-486f-bd08-ebcd4398389e_3.png/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource114/v4/8f/f9/ee/8ff9eebd-0a3b-683c-e186-fcdec61605d2/704ebd42-80c8-48a8-bf7a-3d85091badc0_4.png/1242x2688.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource114/v4/1c/df/8f/1cdf8fda-37cb-10f5-5612-145bafe9bfec/07092c29-9abc-4f25-aa42-60fc4c1a9392_5.png/1242x2688.png)

## RegEx Knife Rating Breakdown in United States
- 5 stars: 15 (60%)
- 4 stars: 6 (24%)
- 3 stars: 1 (4%)
- 2 stars: 3 (12%)
- 1 stars: 0 (0%)

## RegEx Knife Reviews in United States

### ***** "Hands down the best"
I couldn’t find it in the AppStore sometime ago. Thanks for RegEx Knife.
-- 'Tosin, 2024-11-27

### ****- "Please support Chinese."
When there are Chinese characters in the regular expression, they will not be displayed.
-- XU-BAI, 2024-03-24

### ****- "Tool for what?"
Developer should integrate this into shortcuts where it will actually be useful for different types of extractions and maybe a different more up to date UI
-- hackerlocal.us, 2024-03-02

### ****- "Works for basic regexes and that’s it"
It’s nice for simple regexes. Unfortunately, I wanted to use a conditional substitution, but the syntax for that varies by engine and the app doesn’t specify what uses. Would be 5 stars otherwise.
-- Ｓａｓｓｙ Ｃａｓｓｙ, 2022-10-15

### ***** "Bug when renaming a new RegEx"
You fixed the last bug I mentioned and I really like this app layout. 

Found two new bugs.  One is related to dark theme on iPhone.  I can’t see text types in on first type.  It is all black on black.  It fixes itself after a bit of fiddling.

Second is more important.  Creating a new RegEx that takes the untitled name then backing out, rand naming it to String.prototype.string and then it reverted to text from a previous entry.  When opened it showed different regex than the overview page.  It did this a few times until it auto corrected itself.  I have screenshots.  I can’t reproduce this.

These bugs seem to be related to how the app saves on load or on exit?
-- cliffclof, 2021-09-25

### ****- "Needs a Dark Mode update"
Excellent tool for fine tuning regular expressions with clear visual feedback.

The custom keyboard keys are equally clever, but turn invisible in Dark Mode. Fortunately it's usable without them.
-- Chris Pike, 2021-01-20

### ***** "Great app!!!"
It’s awesome! I wish I would look up simple RegEx documents in the app.
-- Shawphy, 2019-11-15

### ***** "Great tool"
I have been using this for years and it has been so helpful and easy that I just took it for granted and never wrote a review. A great way to test and store regex.
-- Anna Vashka, 2019-09-18

### **--- "Crashes regularly"
Lately this app crashes in the middle of use, regardless of text or RegEx patttern.
-- tedsvo, 2019-07-16

### ***-- "Crashes"
It crashes very frequently. One time, it always kept on crashing whenever I selected a specific regex.
-- Ru67576uf657f567u647u, 2018-11-04

[View all RegEx Knife reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)



## RegEx Knife Discovered Keywords
- regex
- regere

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## RegEx Knife Available In
- [United States](https://apptail.io/app/regex-knife-mRXc/united-states)
- [France](https://apptail.io/app/regex-knife-mRXc/france)
- [Russia](https://apptail.io/app/regex-knife-mRXc/russia)
- [China](https://apptail.io/app/regex-knife-mRXc/china)
- [Italy](https://apptail.io/app/regex-knife-mRXc/italy)
- [Australia](https://apptail.io/app/regex-knife-mRXc/australia)
- [Canada](https://apptail.io/app/regex-knife-mRXc/canada)
- [India](https://apptail.io/app/regex-knife-mRXc/india)
- [United Kingdom](https://apptail.io/app/regex-knife-mRXc/united-kingdom)
- [Netherlands](https://apptail.io/app/regex-knife-mRXc/netherlands)
- [Belarus](https://apptail.io/app/regex-knife-mRXc/belarus)
- [Türkiye](https://apptail.io/app/regex-knife-mRXc/turkey)
- [Japan](https://apptail.io/app/regex-knife-mRXc/japan)
- [South Korea](https://apptail.io/app/regex-knife-mRXc/south-korea)
- [Austria](https://apptail.io/app/regex-knife-mRXc/austria)
- [Switzerland](https://apptail.io/app/regex-knife-mRXc/switzerland)
- [Slovakia](https://apptail.io/app/regex-knife-mRXc/slovakia)
- [New Zealand](https://apptail.io/app/regex-knife-mRXc/new-zealand)
- [Malaysia](https://apptail.io/app/regex-knife-mRXc/malaysia)
- [Hong Kong SAR China](https://apptail.io/app/regex-knife-mRXc/hong-kong)
- [Kazakhstan](https://apptail.io/app/regex-knife-mRXc/kazakhstan)
- [Lebanon](https://apptail.io/app/regex-knife-mRXc/lebanon)
- [Mexico](https://apptail.io/app/regex-knife-mRXc/mexico)
- [Namibia](https://apptail.io/app/regex-knife-mRXc/namibia)
- [Norway](https://apptail.io/app/regex-knife-mRXc/norway)
- [Nepal](https://apptail.io/app/regex-knife-mRXc/nepal)
- [Vietnam](https://apptail.io/app/regex-knife-mRXc/vietnam)
- [Armenia](https://apptail.io/app/regex-knife-mRXc/armenia)
- [Argentina](https://apptail.io/app/regex-knife-mRXc/argentina)
- [Azerbaijan](https://apptail.io/app/regex-knife-mRXc/azerbaijan)
- [Bulgaria](https://apptail.io/app/regex-knife-mRXc/bulgaria)
- [Brazil](https://apptail.io/app/regex-knife-mRXc/brazil)
- [Chile](https://apptail.io/app/regex-knife-mRXc/chile)
- [Colombia](https://apptail.io/app/regex-knife-mRXc/colombia)
- [Czechia](https://apptail.io/app/regex-knife-mRXc/czechia)
- [Denmark](https://apptail.io/app/regex-knife-mRXc/denmark)
- [Dominican Republic](https://apptail.io/app/regex-knife-mRXc/dominican-republic)
- [Algeria](https://apptail.io/app/regex-knife-mRXc/algeria)
- [Ecuador](https://apptail.io/app/regex-knife-mRXc/ecuador)
- [Egypt](https://apptail.io/app/regex-knife-mRXc/egypt)
- [Hungary](https://apptail.io/app/regex-knife-mRXc/hungary)
- [Indonesia](https://apptail.io/app/regex-knife-mRXc/indonesia)
- [Ireland](https://apptail.io/app/regex-knife-mRXc/ireland)
- [Israel](https://apptail.io/app/regex-knife-mRXc/israel)
- [Iceland](https://apptail.io/app/regex-knife-mRXc/iceland)
- [Kuwait](https://apptail.io/app/regex-knife-mRXc/kuwait)
- [Philippines](https://apptail.io/app/regex-knife-mRXc/philippines)
- [Pakistan](https://apptail.io/app/regex-knife-mRXc/pakistan)
- [Singapore](https://apptail.io/app/regex-knife-mRXc/singapore)
- [Tunisia](https://apptail.io/app/regex-knife-mRXc/tunisia)
- [Taiwan](https://apptail.io/app/regex-knife-mRXc/taiwan)
- [Ukraine](https://apptail.io/app/regex-knife-mRXc/ukraine)
- [United Arab Emirates](https://apptail.io/app/regex-knife-mRXc/united-arab-emirates)
- [Peru](https://apptail.io/app/regex-knife-mRXc/peru)
- [Mauritius](https://apptail.io/app/regex-knife-mRXc/mauritius)
- [Luxembourg](https://apptail.io/app/regex-knife-mRXc/luxembourg)
- [Latvia](https://apptail.io/app/regex-knife-mRXc/latvia)
- [Estonia](https://apptail.io/app/regex-knife-mRXc/estonia)
- [Portugal](https://apptail.io/app/regex-knife-mRXc/portugal)
- [Qatar](https://apptail.io/app/regex-knife-mRXc/qatar)
- [North Macedonia](https://apptail.io/app/regex-knife-mRXc/north-macedonia)

---

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