RegexOne
Learn regex with simple, interactive exercises.
RegexOne launched on May 14, 2016 with 9 votes, #1,781 of 3,824 launches that month. The site was still online in September 2026, 10 years on.
What it does
RegexOne provides a set of interactive lessons and exercises to help you learn regular expressions
Regular expressions are extremely useful in extracting information from text such as code, log files, spreadsheets, or even documents. And while there is a lot of theory behind formal languages, the following lessons and examples will explore the more practical uses of regular expressions so that you can use them as quickly as possible. The first thing to recognize when using regular expressions is that everything is essentially a character , and we are writing patterns to match a specific sequence of characters (also known as a string). Most patterns use normal ASCII, which includes letters, digits, punctuation and other symbols on your keyboard like %#$@!, but unicode characters can also…from regexone.com
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