Regex Tester/Debugger


Matches (highlighted - hover for index)

Regular Expression, Regex for short, is a sequence of characters that is used to find patterns in strings. It's typically used by programmers to find text that matches an input pattern or replace specific text with other text. This technique is often used to clean up messy code by highlighting potential errors and warnings, as well as helping people search through large amounts of data to find what they are looking for.

Regexes are incredibly useful in certain situations, but they can also be dangerous. These sequences of characters are used to find patterns in strings of text. If you use regexes without understanding how they work, the results could lead to unintended consequences for your data.

The use of regular expressions can be traced back to the 1950s. They are most often used for searching through text, like the text you're reading now. Regular expressions are very powerful because they allow people to search with precision and match things that otherwise would not match. They are most often used in coding languages like JavaScript or Python.

Other Tools

Simple Online Encrypter Decrypter

Body Mass Index

Chess Clock

Text Case Changer