Ecosyste.ms: Awesome

An open API service indexing awesome lists of open source software.

awesome-regex

A curated collection of awesome regex tools, tutorials, libraries, etc.
https://github.com/slevithan/awesome-regex

regex101 - **Best free and best web-based tester**.
RegexBuddy - regex/raw/main/media/windows.svg" title="Windows" height="13"></picture>, $40) - **Best tester**.
RegExr - **Best open source tester**.
fork
RegexLearn - **Best multilingual tester** (JavaScript).
regexplained - **Best tester for presentations** (JavaScript).
RegViz
Regex Storm - storm)].
PHP Live Regex
Pythex
Rubular
CyrilEx - Java, JavaScript, MySQL, PHP, Python, Ruby.
Patterns - regex/raw/main/media/macos.svg" title="macOS" height="13"></picture>, $3) - Bash, Emacs, grep, Java, Oniguruma, PCRE, POSIX BRE, POSIX ERE, Ruby, sed.
RegexPlanet - Go, Haskell, Java, JavaScript, .NET, Perl, PHP, PostgreSQL, Python, Ruby, Tcl, XRegExp.
ChatGPT - Ex: *"create a regex that matches `X` and explain it step by step"*.
RegexMagic - regex/raw/main/media/windows.svg" title="Windows" height="13"></picture>, $40) - Generate regexes using samples and rules.
Regex Generator - generator)] - Generate simple regexes from a sample text.
Regex.ai - Mark samples in a text and use AI to generate potential regexes.
Regex Vis - vis)] - Create railroad diagrams, with visual editor. Flavor: JavaScript.
Regulex - Create railroad diagrams. Flavor: JavaScript.
Nodexr - Graphical editor with visual hierarchy. Flavor: .NET.
Regex Nodes - nodes)] - Graphical editor with visual hierarchy. Flavor: JavaScript.
Debuggex - Create railroad diagrams. Flavors: JavaScript, PCRE, Python.
RegExper - static)] - Create railroad diagrams. Flavor: JavaScript.
ripgrep - Better and faster grep. Recursively searches directories while respecting gitignore rules and skipping hidden/binary files.
Feature comparison of grep-like tools
Aba Search and Replace - regex/raw/main/media/windows.svg" title="Windows" height="13"></picture>, $30) - Displays matches as you type.
PowerGREP - regex/raw/main/media/windows.svg" title="Windows" height="13"></picture>, $159) - Can search through archives, binary files, PDFs, docs/sheets, emails, etc., via its GUI or the command line.
RegexRenamer - regex/raw/main/media/windows.svg" title="Windows" height="13"></picture>) - Rename files using regexes.
Regular-Expressions.info - Covers numerous regex flavors.
The Modern JavaScript Tutorial: Regular expressions - tutorial/en.javascript.info)] - Guide to using regexes in modern JavaScript.
others
RexEgg - Detailed tutorial with advanced topics.
learnbyexample - Ebooks on regexes ([JavaScript](https://learnbyexample.github.io/learn_js_regexp/), [Python](https://learnbyexample.github.io/py_regular_expressions/), [Ruby](https://learnbyexample.github.io/Ruby_Regexp/)) and command line text processing.
Regular Expressions for Regular Folk - for-regular-folk)] - Visual, example-based ebook for beginners.
RegexLearn - Interactive tutorial and practice problems.
RegexOne - Interactive tutorial and practice problems.
*Demystifying Regular Expressions* - Great presentation for beginners, by Lea Verou at HolyJS 2017 (1hr 12m).
*Learn Regular Expressions In 20 Minutes* - Live syntax walkthrough in a regex tester, by Kyle Cook.
Udemy
RegExp - US/docs/Web/JavaScript/Reference/Regular_expressions), [Guide](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_expressions).
Manual
Regular expressions library
Introduction
Regular Expressions
Pattern - summary.html).
Overview - us/dotnet/standard/base-types/regular-expression-language-quick-reference), [API](https://learn.microsoft.com/en-us/dotnet/api/system.text.regularexpressions).
RE
pcre2pattern
Syntax
re
Syntax
regex - lite/latest/regex_lite/).
Grammars - best-practices)).
Regular Expressions - Flavor: ICU.
Regular Expressions - Flavor: PCRE.
Regexp - Flavor: Onigmo.
NSRegularExpression - Flavor: ICU.
V8: Irregexp - JavaScript `RegExp` engine used by Chrome, Edge, [Firefox](https://hacks.mozilla.org/2020/06/a-new-regexp-engine-in-spidermonkey/), etc.
JavaScriptCore: RegExp - JavaScript `RegExp` engine used by Safari.
Boost.Regex - Popular C++ regex library.
Hyperscan - Intel's high-performance library, used for [DPI](https://en.wikipedia.org/wiki/Deep_packet_inspection).
ICU - Unicode org's package with full Unicode support.
Java: java.util.regex - JDK standard regexes.
.NET: System.Text.RegularExpressions - Shared by all .NET languages (C#, VB, etc.).
Onigmo - Forked and extended from Oniguruma. Default regex library of Ruby 2.0+.
Oniguruma - Popular C regex library. Default regex library of Ruby 1.9.
PCRE2 - Popular C regex library used by PHP, R, etc.
Perl - See [perlreguts](https://perldoc.perl.org/perlreguts).
Python: re - regex) - Standard and extended regex libraries.
RE2 - Popular C++ regex library used by Go, etc. Non-backtracking engine.
Rust: regex - Non-backtracking engine.
Regular Expression Feature Comparisons - features)].
Tools & Languages
Named capture
Comparison of regular expression engines
ReDoS
Runaway Regular Expressions: Catastrophic Backtracking - Exploration and solutions for superlinear backtracking.
Book: High Performance JavaScript - *Chapter 5: Strings and Regular Expressions*.
Book: Mastering Regular Expressions, 3rd Edition - *Chapter 6: Crafting an Efficient Expression*.
Performance of Greedy vs. Lazy Regex Quantifiers - Illustrates the mechanics of backtracking.
Regular Expression Matching Can Be Simple And Fast - On non-backtracking engines. A [follow up](https://swtch.com/~rsc/regexp/regexp3.html) includes comparisons of RE2 and PCRE performance.
Regular Expression Improvements in .NET 7 - performance-improvements-in-net-5/) - Includes detailed explanations of performance optimizations.
ripgrep is faster than {grep, …} - Includes details about what makes ripgrep and Rust's `regex` fast.
rebar - benchmark](https://github.com/mariomka/regex-benchmark), [sljit/regex_perf.html](https://zherczeg.github.io/sljit/regex_perf.html).
Boost.Regex: Performance - Compares Boost, C++ `std::regex`, and others.
regex.rip - Test a regex for ReDoS vulnerability.
recheck - labs.github.io/recheck/)] - JavaScript and Scala library for detecting ReDoS vulnerability. Can be used as an ESLint plugin.
vuln-regex-detector - Perl library for detecting ReDoS vulnerability.
Book: Regular Expressions Cookbook, 2nd Edition - High-quality solutions with detailed explanations.
Regex DB - Solutions include basic descriptions and examples of matching and non-matching text.
regex - A template tag with best practices built-in and advanced features.
XRegExp - Extended regex syntax, flags, and utils; useful for backcompat.
incr-regex-package - Partial/incremental matching, used by [react-rxinput](https://github.com/nurulc/react-rxinput) for input validation with a regex mask.
node-re2 - Bindings for RE2, a non-backtracking engine.
rregex - Bindings for Rust's `regex`, a non-backtracking engine.
Rexx - A template tag that uses structured syntax with variables and comments.
Melody - lavi.github.io/melody/book/)] - A language that compiles to regexes.
compose-regexp.js - regexp](https://github.com/unjs/magic-regexp) \[[*home*](https://regexp.dev/)], [Super Expressive](https://github.com/francisrstokes/super-expressive) \[[*playground*](https://nartc.github.io/ng-super-expressive/)].
regexp-tree - community/regexpp) (used by ESLint), [regjsparser](https://github.com/jviereck/regjsparser)/[regjsgen](https://github.com/bnjmnt4n/regjsgen).
AST Explorer: RegExp - View ASTs generated by regexp-tree, regexpp, and regjsparser.
regexp-ast-analysis - ast-analysis/docs/latest/)] - Analyze AST nodes produced by regexpp.
Regex Colorizer - colorizer/demo/)], [CodeMirror PCRE mode](https://github.com/xavierog/codemirror-mode-pcre).
eslint-plugin-regexp - meshi.github.io/eslint-plugin-regexp/)], [eslint-plugin-optimize-regex](https://github.com/BrainMaestro/eslint-plugin-optimize-regex).
randexp.js - to-strings](https://github.com/wimpyprogrammer/regex-to-strings).
regexgen
standard
[*explainer*
[*explainer*
[*explainer* - folding for flag `i`, and surrogate pairs as code points (with impact on quantifiers, character classes, character class ranges, and built-in sets like `.` and `\W`).
flag `s` - regexp-lookbehind), [named capture](https://github.com/tc39/proposal-regexp-named-groups), and [Unicode properties](https://github.com/tc39/proposal-regexp-unicode-property-escapes) via `\p{…}` and `\P{…}` behind flag `u` (see [list](https://github.com/mathiasbynens/regexpu-core/blob/main/property-escapes.md)).
`matchAll`
flag `d`
flag `v` - v-flag)] as an upgrade to flag `u` (can't be used together), which adds a set of multicharacter "properties of strings" to `\p{…}`, multicharacter elements within character classes via `\p{…}` and `\q{…|…}`, nested character classes, set operators `[…--…]` and `[…&&…]`, improved case-insensitive matching, and different escaping rules within character classes.
lists - string-replaceall), which optionally accepts a `RegExp`, but it behaves identically to ES3's `replace` when given a regex as the search.
regexpu - unicode-properties)).
[*explainer* - tos/run-chromium-with-flags/)].
Can I use - Up-to-date browser support tables for individual features.
Duplicate named capturing groups - Ex: `(?<a>…)|(?<a>…)`.
Extended mode and comments - Flag `x` (`extended`) with insignificant whitespace and line comments (`#…`), plus inline comments via `(?#…)`.
Pattern modifiers - Ex: `(?ims:…)`, `(?-ims:…)`, `(?i-ms:…)`.
Atomic operators - Atomic groups via `(?>…)` and possessive quantifiers (ex: `*+`, `++`).
Buffer boundaries - Anchors `\A` and `\z`, not affected by flag `m`.
\R escape - Outside character classes, `\R` matches any line terminator.
Restrict subclassing support in built-ins - Scaled back `RegExp` subclassing.
RegExp escaping - `RegExp.escape`.
Legacy RegExp features - Standardization of legacy features.
*Regular Expressions Cookbook, 2nd Edition* - Regex tutorial with code samples for eight programming languages, 100+ regex recipes for practical problems, and a deep focus on cross-flavor differences.
*Mastering Regular Expressions, 3rd Edition* - A computer science classic, best for people who already know the basics. Includes good coverage of crafting efficient regexes.
*Introducing Regular Expressions* - An intro for programmers new to regular expressions that sticks to the basics.
*The World's Shortest Regex Compiler?* - dfa) on optimization - Introduction to writing a non-backtracking regex engine (in JavaScript).
*Regex Legends: The People Behind the Magic* - Influential people behind the technology.
*Fun With .NET Regex Balancing Groups* - Advanced usage of a .NET-only regex feature.
Reddit: r/regex
Stack Overflow: [regex]
Regex - Regex search on webpages via `Ctrl+Shift+F`.
regex101 Regex Quiz - Requires sign-in.
Regex Crossword
xkcd

Programming Languages

JavaScript 18 HTML 6 Rust 3 C 3 C++ 3 TypeScript 2 Python 1 Perl 1 Scala 1

Keywords

regex 13 regexp 11 regular-expression 9 rust 4 regular-expressions 3 javascript 2 eslint-plugin 2 c 2 nfa 1 regex-engine 1 regex-parser 1 regex-syntax 1 dfa 1 automaton 1 automata 1 redos 1 redos-checker 1 scala 1 security 1 vulnerability 1 javascript-regular-expressions 1 verbalexpressions 1 cli 1 unicode 1 es2015 1 ecmascript 1 code-generation 1 ecmascript-proposal 1 testing 1 node 1 eslintplugin 1 syntax-highlighting 1 melodylang 1 melody 1 language 1 compiler 1 typescript 1 unicode-mode 1 buffers 1 search 1 ripgrep 1 recursively-search 1 grep 1 gitignore 1 command-line-tool 1 command-line 1