
JSFiddle
CodeSandbox
GitHub
replit
VS Code
Pastebin.com
JS Bin
A front end web development playground.

Cypress.io
Katalon
TestMu AI (Formerly LambdaTest)
BrowserStack
UI.Vision
Ghost Inspector
Playwright
Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.

Which is more popular?
Based on our record, CodePen seems to be a lot more popular than Selenium. While we know about 513 links to CodePen, we've tracked only 9 mentions of Selenium.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | codepen.io | selenium.dev |
| Pricing | — | |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using CodePen and Selenium. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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.
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...
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.
Nightwatch.js simplifies the setup and use of Selenium WebDriver, providing an abstraction layer that is easier to work with for JavaScript developers. While it offers the broad compatibility and standardization of...
And that’s why code-free test automation is important. Implementing codeless Selenium alternatives can address the challenges posed by traditional Selenium testing. They help testers with various skill sets to...
Automation testing is the process of testing the software using an automation tool to find the defects. In this process, executing the test scripts and generating the results are performed automatically by automation...
Recommendations tracked on public social media and blogs since March 2021.


> I vividly remember IE and many hacks to have css elements properly working in it… The common advice now is to only use CSS that is supported in the last two major versions of each major browser. You can check any css property's support... - Source: Hacker News / about 1 month ago
Thank you, heartfelt... For sharing an artwork, a miracle! Just in case, have you considered publishing the work at platforms as CodePen, where genius Artists/People express their art, too, as you?: // https://codepen.io/. - Source: Hacker News / 2 months ago
Embed on DEV: If you prefer CodePen embed, create a Pen with that HTML and add to the post as: {% codepen https://codepen.io//pen/ %}. - Source: dev.to / 11 months ago
Selenium is one of the most popular and mature automated testing frameworks for web applications. Unlike Puppeteer, which is limited to Chromium, Selenium supports all major browsers—including Chrome, Firefox, Safari, and Edge—making it... - Source: dev.to / about 1 year ago
You won't be able to test the javascript function itself from within python, but you can exercise the front-end code using something like cypress (https://cypress.io) or the older but still respectable selenium (https://selenium.dev). Source: over 3 years ago
In addition, .find_element_by_class_name is deprecated since selenium 4.3.0 and the replacement is .find_element(By.CLASS_NAME, "class"). Check selenium's site for more info. Source: over 3 years ago
When comparing CodePen and Selenium, you can also consider the following products.

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
Compare JSFiddle to CodePen or Selenium:

Slow, difficult and unreliable testing for anything that runs in a browser. Install Cypress in seconds and take the pain out of front-end testing.
Compare Cypress.io to CodePen or Selenium:


Built on the top of Selenium and Appium, Katalon Studio is a free and powerful automated testing tool for web testing, mobile testing, and API testing.
Compare Katalon to CodePen or Selenium:

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.
Compare GitHub to CodePen or Selenium:

World’s first full-stack Agentic AI Quality Engineering platform.
Compare TestMu AI (Formerly LambdaTest) to CodePen or Selenium: