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Best Regular Expression Testers in 2026

A regular expression tester lets you try patterns and inspect how they behave against text. Compare supported regex flavors, pattern explanation and step-through debugging to see how each tool can help you understand a match.

  1. 01 AppTools Regex Tester

    The tool suits people who need to inspect or debug regex patterns for tasks such as log parsing, data cleanup, or input filtering.

    Free plan Web · Windows · macOS · Linux
    9.1 Visit Specs
  2. 02 Debuggex

    Debuggex suits developers who write or inspect JavaScript, Python, or PCRE regular expressions.

    From $5/mo Free plan Web · Self-hosted
    9.1 Visit Specs
  3. 03 Regex Hero

    Regex Hero suits developers writing and checking .NET regular expressions, especially those who want live match highlighting and C# or VB.NET code generation.

    Free plan Web · Windows
    8.9 Visit Specs
  4. 04 regex101

    It suits developers who need to construct and inspect regular expressions across several language flavors.

    From €4.99/mo Free plan Web · Linux · API · Self-hosted
    8.5 Visit Specs
  5. 05 RegexCraft

    RegexCraft suits people who work with regular expressions on Windows, Linux, or macOS, including those who want to compare flavors or step through the .NET engine.

    Free plan Windows · macOS · Linux
    8.3 Visit Specs
  6. 06 RegexPilot

    RegexPilot suits Mac users who build and test patterns across multiple regex flavors.

    Free plan Web · macOS · Browser extension
    8.3 Visit Specs
  7. 07 RegexBuddy
    Windows · Linux
    7.9 Visit Specs
  8. 08 RegexRegex

    RegexRegex suits people who need to inspect JavaScript regular expressions in a browser or assemble basic patterns with guided controls.

    Free plan Web
    7.9 Visit Specs
  9. 09 RegExr

    RegExr suits people learning or working with JavaScript or PHP/PCRE regular expressions who want live feedback and test cases.

    Free plan Web
    7.6 Visit Specs
  10. 10 Retest

    Retest suits developers who want to build and inspect regular expressions in a Linux terminal.

    Free plan Linux
    7.6 Visit Specs
  11. 11 RegexPlanet

    RegexPlanet suits developers who need browser-based testing across many regex engines.

    Free plan Web
    7.5 Visit Specs
  12. 12 Regex Shuttle

    It suits developers, data analysts, students, and beginners who need to test or learn JavaScript regular expressions.

    Free plan Web
    7.4 Visit Specs
  13. 13 The Regex Coach

    The Regex Coach may suit programmers working with Perl-compatible regex toolkits such as PCRE or CL-PPCRE.

    Free plan Windows · Linux
    7.3 Visit Specs
  14. 14 Regexo

    Regexo suits developers who want a desktop workspace for checking, replacing, and saving Java regular expressions.

    Windows · macOS · Linux
    7.2 Visit Specs
  15. 15 Regex Tester Pro
    From $4.99/mo Browser extension
    7.2 Visit Specs
  16. 16 RegexStudio

    RegexStudio suits developers and learners who need browser-based regex inspection, debugging, explanation, and code generation.

    Web
    7.1 Visit Specs
  17. 17 RegEx Visualizer & Explainer

    It suits developers, students, designers, and other professionals who need to inspect JavaScript regular expressions in a browser.

    Free plan Web
    7.1 Visit Specs
  18. 18 SK Play Labs Regex Tester

    Developers and learners who want browser-based JavaScript regex testing with match highlighting and explanations.

    Free plan Web
    7.1 Visit Specs
  19. 19 RegexAssistant
    Windows
    6.9 Visit Specs
  20. 20 txtnode Regex Tester

    It suits developers, writers, and anyone wanting a simple browser utility for regex work.

    Free plan Web
    6.9 Visit Specs
  21. 21 Regulex
    Web · Linux
    6.8 Visit Specs
  22. 22 RegEx Tester
    Web
    6.5 Visit Specs
  23. 23 Regex Playground
    Web
    5.8 Visit Specs
How this list is ordered. Specifiction scores each tool on how fully its maker documents it, whether its prices are published, where the research puts it, the platforms it runs on and whether it can be tried for free (how we rank). Makers can also buy a numbered place (how Specifiction is paid for).

Saved patterns and code generation matter if you want to keep or reuse your work. Available platforms, free-plan availability and “Paid from” details add practical context to the comparison. regex101, RegexPilot and RegexCraft are among the options shown, alongside Debuggex and The Regex Coach. Consider whether you need to test, explain, debug or preserve patterns, and compare those needs with the features and platforms listed.

Compare AppTools Regex Tester and Debuggex Get a place on this list

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