PowerGREP powergrep.com

regexp pkg.go.dev

PHP Live Regex phpliveregex.com

Regular Expressions php.net

Syntax perldoc.perl.org

pcre2test pcre2project.github.io

Pattern pcre2project.github.io

Nodexr nodexr.net

rxrx metacpan.org

Performance of Regular Expressions medium.com

explainer mathiasbynens.be

learnbyexample learnbyexample.github.io

Overview learn.microsoft.com

Regex Nodes johannesvollmer.com

others javascript.info

The Modern JavaScript Tutorial: Regular expressions javascript.info

The World's Shortest Regex Compiler? jasonhpriestley.com

Introduction hyperscan.io

JavaScriptCore: RegExp github.com

V8: Irregexp github.com

ICU github.com

Python: re github.com

Perl github.com

Java: java.util.regex github.com

RE github.com

RE github.com

Syntax github.com

.NET: System.Text.RegularExpressions github.com

arkregex github.com

fancy-regex playground fancy-regex.github.io

CyrilEx extendsclass.com

Comparison of regular expression engines en.wikipedia.org

Regular expressions library en.cppreference.com

Regexp docs.ruby-lang.org

regex docs.rs

re docs.python.org

Pattern docs.oracle.com

RegExp developer.mozilla.org

Regex developer.apple.com

Regular Expression Improvements in .NET 7 devblogs.microsoft.com

Regular Expressions dev.mysql.com

Debuggex debuggex.com

Manual boost.org

Boost.Regex: Performance boost.org

Regex Legends: The People Behind the Magic blog.stevenlevithan.com

Performance of Greedy vs. Lazy Regex Quantifiers blog.stevenlevithan.com

ripgrep is faster than {grep, …} blog.burntsushi.net

Introducing Regular Expressions amazon.com

Regular Expressions Cookbook, 2nd Edition amazon.com

Book: High Performance JavaScript amazon.com