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CodePen VS regular expressions 101

Compare CodePen VS regular expressions 101 and see what are their differences

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CodePen logo CodePen

A front end web development playground.

regular expressions 101 logo regular expressions 101

Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.
  • CodePen Landing page
    Landing page //
    2018-09-30
  • regular expressions 101 Landing page
    Landing page //
    2023-07-30

CodePen features and specs

  • Real-time Collaboration
    Developers can collaborate with others in real-time, making it easy to work on projects with teammates or seek help from the community.
  • Immediate Visual Feedback
    CodePen allows you to see the results of your code as you write it, which is highly beneficial for learning and debugging.
  • Integrated Development Environment (IDE)
    CodePen provides a comfortable and feature-rich online IDE environment with syntax highlighting, autocomplete, and more.
  • Community-Driven
    Users can share their work with the CodePen community, receive feedback, and explore a wide range of projects created by others.
  • Extensive Resources
    CodePen offers a wealth of examples and templates for various web development tasks, making it a useful resource for learning and inspiration.
  • Cross-Device Accessibility
    Being an online platform, CodePen can be accessed from any device with an internet connection, making it convenient for developers on the move.

Possible disadvantages of CodePen

  • Limited Offline Functionality
    Since CodePen is primarily an online tool, it requires an internet connection for most of its features to work, limiting its usefulness in offline environments.
  • Performance Constraints
    Complex or resource-intensive projects may not perform as well on CodePen as they would in a full-fledged local development environment.
  • Subscription Costs
    While many features are free, advanced functionalities and additional storage options require a paid subscription, which may not be ideal for all users.
  • Limited Backend Capabilities
    CodePen is primarily designed for front-end development, so it offers limited support for backend technologies, making it less suitable for full-stack or server-side development.
  • Dependency Management
    Managing dependencies and libraries can be cumbersome compared to local development environments which have better tools for this purpose, like npm.
  • Security Concerns
    Sharing projects with the public can expose your code and assets to unauthorized use, posing potential intellectual property and security risks.

regular expressions 101 features and specs

  • 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.
  • 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.
  • Error Highlighting
    Regex101 highlights errors in your regular expressions and provides explanations, which helps users quickly identify and correct mistakes.
  • 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.
  • 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.
  • Community Support
    The platform has community features wherein users can share their regular expressions and get feedback or suggestions from others.

Possible disadvantages of regular expressions 101

  • Limited to Browser
    Regex101 is a web-based tool, and its usage is restricted to browsers with internet access, limiting its offline availability and performance in a development environment.
  • User Interface Complexity
    For beginners, the user interface can be somewhat overwhelming due to the numerous options and features available, leading to a steeper learning curve.
  • Performance Limitations
    While sufficient for most use cases, Regex101 may struggle with very large datasets or extremely complex regular expressions, causing performance issues.
  • Dependency on External Product
    Relying on an external service means users are dependent on the platform's availability and continued maintenance, which can be a risk if the service goes down or changes significantly.
  • Potential Overreliance
    Frequent use of Regex101 for developing regular expressions may lead to an overreliance on the tool, potentially hindering the development of strong, intrinsic regex skills.

CodePen videos

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What Is Codepen?

More videos:

  • Review - Learn to use CodePen from a co-founder of CodePen
  • Review - Using CodePen For Inspiration & Learning

regular expressions 101 videos

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Category Popularity

0-100% (relative to CodePen and regular expressions 101)

CodePen

regular expressions 101

Text Editors
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Text Editors
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Regular Expressions
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Regular Expressions
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Programming
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Programming
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Programming Tools
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Programming Tools
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User comments

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Reviews

These are some of the external sources and on-site user reviews we've used to compare CodePen and regular expressions 101

CodePen Reviews

Best Forums for Developers to Join in 2025
Codepen is a social network for developers to show off their work, ask and answer questions, and exchange ideas. It's like a Reddit for coding and design, with a large community of talented web developers.
Source: www.notchup.com
Top 10 Developer Communities You Should Explore
Codepen is a social development environment that allows developers to showcase their work and experiment with HTML, CSS, and JavaScript in a collaborative space. Codepen’s focus on visual and interactive development makes it an excellent community for front-end developers and designers.
Source: www.qodo.ai
8 Best Replit Alternatives & Competitors in 2022 (Free & Paid) - Software Discover
Codepen is a social development environment for front-end designers and developers. Build and deploy a website, show off your work, build test cases to learn.
Source: www.softwarediscover.com
Best Online Code Editors For Web Developers
Probably the most popular online code editor. CodePen is fast, easy to use, and allows a web developer to write and share HTML/CSS/JS code online.
Source: techarge.in
Top 25 websites for coding challenge and competition [Updated for 2021]
CodePen is a cool online IDE that allows you to write code in your browser and see the result just as you build it. CodePen challenges is a place for leveling up your skills by building things. Each week, new challenges appear for you to tackle, and the best “Pens” get picked.
Source: towardsdatascience.com

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Social recommendations and mentions

Based on our record, regular expressions 101 should be more popular than CodePen. It has been mentiond 881 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

CodePen mentions (503)

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regular expressions 101 mentions (881)

  • 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 / 25 days 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 / 25 days 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 🔖. - Source: dev.to / about 2 months 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 / 3 months 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 / 4 months ago
View more

What are some alternatives?

When comparing CodePen and regular expressions 101, you can also consider the following products

JSFiddle - Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.

RegExr - RegExr.com is an online tool to learn, build, and test Regular Expressions.

CodeSandbox - Online playground for React

rubular - A ruby based regular expression editor

GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.

Expresso - 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 with an extensive knowledge of regular expressions.

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