However, all of them make use of ads in some form or another. Regex Tester Comparison – Google Trends AdvertisementsĪll three of these tools are free to use for everyone! As far as I can tell, none of them have a paid tier. Explanation of ExpressionsĪll three tools generate a great explanation of your code through tooltips as you mouse over portions of your code. Regex101 Regexr RegexTester Code explanation (tooltips) Yes Yes Yes Code explanation (details) Yes Yes Syntax highlighting Yes Yes Yes Math highlighting Yes Yes Yes Flag settings Yes Yes Yes Show number of matches Yes Yes Yes Substitution Yes Yes Yes Save regex Yes Yes Share regex Yes Yes Unit testing Yes Yes Details of matched groups Yes Yes Community expressions Yes Yes Code generator Yes Debugger Yes Language support Yes 1. Here’s a table of core features supported by all three tools, followed by an explanation of each. Core Featuresįor developers, the features of any tool are undoubtedly a big factor when choosing a piece of software. An identical site is also found at, which is also part of Dan’s tools. RegexTester is part of a group of tools called Dan’s Tools that perform a variety of developer-oriented services online. This site has become one of the most popular regex-related sites and is often the first result that comes up when searching for regex. Regexr is an open-source regex tester created by Gskinner, a digital creative studio. It is currently closed-source and the developer has no plans of making it open-source anytime soon. Regex101 was started by Firas Dib as a hobby more than 10 years ago and grew into a full-featured Regex testing utility with a community of supporters and testers. So let’s dive right in and start the comparison with a quick background on each! Background You can see the expression in action on Regexr and Regex101. All three tools are easy to learn and use.įor comparison and screenshots, I’ve chosen a simple expression (for matching a particular date format) that I can test on all three tools. RegexTester is a wonderful minimalist tool with all the basic features you need. Regexr is a close second with a great design and modern feel. The best regular expressions tester is Regex101 since it boasts the most features and supports the most language flavors. In this post, we make a thorough comparison of three regex tester tools: Regex101, Regexr, and RegexTester. There are some grand tools online these days that allow you to write and test just about any regular expression out there using color coding, code explanation, substitution, etc.
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