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regular expressions 101

Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.

regular expressions 101

regular expressions 101 Reviews and Details

This page is designed to help you find out whether regular expressions 101 is good and if it is the right choice for you.

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  • regular expressions 101 Landing page
    Landing page //
    2023-07-30

Features & Specs

  1. Interactive Learning

    Regex101 provides an interactive environment where users can test and learn regular expressions in real-time, making the learning process more engaging and practical.

  2. Extensive Documentation

    The site offers extensive documentation and references for different regular expression flavors (PCRE, JavaScript, Python, and Golang), facilitating easy access to syntax and usage examples.

  3. Error Highlighting

    Regex101 highlights errors in your regular expressions and provides explanations, which helps users quickly identify and correct mistakes.

  4. Quick Reference

    A quick reference guide is available on the platform, which helps users look up common regular expression tokens and their meanings without leaving the page.

  5. Saved Workspaces

    Users can save their regular expressions and test cases in workspaces, making it convenient to revisit and continue working on them at a later time.

  6. Community Support

    The platform has community features wherein users can share their regular expressions and get feedback or suggestions from others.

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Social recommendations and mentions

We have tracked the following product recommendations or mentions on various public social media platforms and blogs. They can help you see what people think about regular expressions 101 and what they use it for.
  • PWC 376 Doubled Words
    Time to take care of that regular expression that acts as the word separator. With some experimentation (the regex101 web site is good for that), we arrived at this:. - Source: dev.to / about 1 month ago
  • How to Use Regex in JavaScript: Complete Guide with Examples
    Regex101.com โ€” full debugger with step-by-step matching. - Source: dev.to / 4 months ago
  • 4 Days as an Autonomous AI Agent: What I Built, What Failed, What I Learned
    Regex101.com is objectively better than my regex explainer. - Source: dev.to / 6 months ago
  • What Happened to WebAssembly
    To add to the authors list of examples, the regex test site Regex 101 (http://regex101.com/) relies on WebAssembly. To verify this in Firefox, you can set javascript.options.wasm to false, and you will be instructed to use a browser supporting WebAssembly. If you're willing to risk some safety guarantees, then you can use SQLite in Go without cgo if you rely on wasm builds of SQLite. In particular, this package... - Source: Hacker News / 6 months ago
  • OpenTelemetry Filelog Receiver: A Guide to Ingesting Log Files
    Before adjusting your Collector config, test the regex outside of it using a tool like Regex101. Make sure to select the Golang flavor so it behaves the same way as the Collector's regex engine. - Source: dev.to / 8 months ago
  • OpenTelemetry Filelog Receiver
    How do I test regex patterns? Use Regex101 with the "Golang" flavor to match the Collector's regex engine. - Source: dev.to / 8 months ago
  • Understanding Regular Expressions in JavaScript (Beginnerโ€™s Guide)
    You can use free tools like regex101.com to test your patterns and understand how they work step by step. - Source: dev.to / 9 months ago
  • Unlocking the Power of Search with Regex: A Comprehensive Guide for Developers
    Regex101 is an online regex tester that provides real-time feedback on your regex patterns. It offers explanations for each part of your regex, helping you understand how it works. You can also find community patterns and examples to learn from. - Source: dev.to / 10 months ago
  • ๐Ÿš€ 10 Tiny Dev Tools That Feel Like Superpowers (Free or Almost Free)
    Test and debug regex with detailed explanations for each part. ๐Ÿ”— https://regex101.com. - Source: dev.to / 11 months ago
  • Understanding Regex in Kong Gateway: Then vs Now
    Test with https://regex101.com/ before deploying. - Source: dev.to / 12 months ago
  • Regex Isn't Hard (2023)
    In practice, the first unpaired ] is treated as an ordinary character (at least according to https://regex101.com/) - which does nothing to make this regex fit for its intended purpose. I'm not sure whether this is according to spec. (I think it is, though that does not really matter compared to what the implementations actually do.) Characters which are sometimes special, depending on context, are one more thing... - Source: Hacker News / about 1 year ago
  • Regex Isn't Hard (2023)
    > unreadable once written (to me anyway) https://regex101.com can explain your regex back to you. - Source: Hacker News / about 1 year ago
  • Catching Trailing Spaces - A Superhero's Story!
    To try out our newfound regex, I will use the website called RegEx101. It's a superhero favourite, so you better bookmark it for later ๐Ÿ”–. - Source: dev.to / over 1 year ago
  • How I accidentally wrote a simple Markdown editor
    Let's break it down a bit. You can use Regex101 to follow me. - Source: dev.to / over 1 year ago
  • 22 Unique Developer Resources You Should Explore
    URL: https://regex101.com What it does: Test and debug regular expressions with instant explanations. Why it's great: Simplifies regex learning and ensures patterns work as intended. - Source: dev.to / over 1 year ago
  • FFmpeg by Example
    I use regexes a lot. The main thing that always trips me up is dealing with escaping, because different tools I use โ€“ vim, sed, rg, and so on โ€“ sometimes have different meanings for when to escape or not. In one tool youโ€™ll use + to match one or more times, and \+ to mean literal plus sign. In another tool youโ€™ll use \+ to match one or more time, and + to mean literal plus sign. In one tool youโ€™ll use ( and ) to... - Source: Hacker News / over 1 year ago
  • [Development Tips] How to Get the Number of Strokes in Chinese Characters?
    By looking up the results, we need the kTotalStrokes field in the IRG Source. Extract this file. I tested the regex on regex101 to extract the desired Unicode part and stroke count part, and saved them separately for querying. - Source: dev.to / over 1 year ago
  • How to work with regular expressions
    Thanks for regex101.com site, which allowed test my regular expressions. - Source: dev.to / over 1 year ago
  • What is regular expression and how to use it in javascript
    As you explore regex, you'll find that they can be intimidating at first, but with practice, they become invaluable in your coding toolkit. For hands-on practice, visit regex101.com to test your patterns and see immediate results. - Source: dev.to / over 1 year ago
  • Platform Strategy and Its Discontents: The web is losing. A comeback is possible
    >, why bother running a binary app in the browser when you can run it on the desktop or phone? Because the web browser with Javascript/WASM is more universal runtime platform than MSWindows-Win32api-WinForms-WPF, Apple-Obj-C-Cocoa-Swift, and Linux-GNOME-KDE, etc. For example, this is local desktop software I paid $29 almost 20 years ago for testing complex regex expressions: ... - Source: Hacker News / over 1 year ago
  • New Regular expression (Regex) functions in Excel
    Could we get some easy aliasing of REGEXREPLACE to reRepl and picking a regex engine that matches the syntax rules you're used to in a the next decade or so? > Try asking Bing Copilot for regex patterns! Or maybe embed a cheaper and more reliable solution like https://regex101.com? - Source: Hacker News / about 2 years ago

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  1. User avatar
    double2
    ยท 2 months ago
    ยท Reply

    The gold standard for regex debugging. Its real-time explanation of complex patterns and support for multiple flavors (PCRE, Python, JS) makes it an indispensable tool for every developer's daily workflow.

  2. regal avatar
    regal
    ยท over 2 years ago
    ยท Reply

    Unsure if this AI generated regex really does what it should? Go and check it @101!

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