Regex101 is a powerful, online regular expression tool with extensive support for multiple languages including PHP, PCRE, Python and JavaScript.
Cost / License
- Free
- Proprietary
Platforms
- Online

Multi String Search is described as 'Search multiple strings occurrences simultaneously with the help of this piece of software that comes with support for regular expressions' and is an app. There are more than 50 alternatives to Multi String Search for a variety of platforms, including Windows, Web-based, Mac, Linux and Self-Hosted apps. The best Multi String Search alternative is regular expressions 101, which is free. Other great apps like Multi String Search are RegExr, AstroGrep, dnGREP and Expresso.
Regex101 is a powerful, online regular expression tool with extensive support for multiple languages including PHP, PCRE, Python and JavaScript.

RegExr.com is an online tool to learn, build, and test Regular Expressions. It was created by Grant Skinner and the nice people at gskinner.com.

AstroGrep is A Microsoft Windows GUI File Searching (grep) utility. Features include regular expressions, versatile printing options, stores most recent used paths and has a "context" feature which is very nice for looking at source code.



dnGrep allows you to search across files with easy-to-read results. Search through text files, Word documents, PDFs, and archives using text, regular expression, XPath, and phonetic queries. dnGrep includes search-and-replace, whole-file preview, right-click search in File...




The award-winning Expresso editor is equally suitable as a teaching tool for the beginning user of regular expressions or as a full-featured development environment for the experienced programmer or web designer with an extensive knowledge of regular expressions.


grep is a command-line utility for searching plain-text data sets for lines matching a regular expression.

RegexMate offers seamless regex crafting and testing on macOS and iOS. Its minimalist interface provides an instant live preview, and users can save their expressions into a library for quick reference. A comprehensive guide with tutorials is always accessible, with light and dark mode options.




A user-friendly, faster, more capable grep replacement. Includes a TUI, Google-like Boolean search with AND/OR/NOT, fuzzy search, hexdumps, searches (nested) archives (zip, 7z, tar, pax, cpio), compressed files (gz, Z, bz2, lzma, xz, lz4, zstd, brotli), pdfs, docs, and...



RegexBuddy is your perfect companion for working with regular expressions. Learning, creating, understanding, testing, using and saving regular expressions has never been easier.



PowerGREP is a powerful Windows grep tool. Quickly search through large numbers of files on your PC or network, including text and binary files, compressed archives, MS Word documents, Excel spreadsheets, PDF files, OpenOffice files, etc.


The only one Regular Expression tester you need, that will help you to test your regular expressions in flavors:

