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

Dark Reader
Stylebot
Stylus
JavaScript Obfuscator
Amino Editor
JSFiddle
OneCompiler
User JavaScript and CSS on any website

Which is more popular?
Based on our record, CodePen seems to be a lot more popular than User JavaScript and CSS. While we know about 513 links to CodePen, we've tracked only 13 mentions of User JavaScript and CSS.
Website, pricing, platforms and company facts side by side.
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| Website | codepen.io | chromewebstore.google.com |
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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
No analysis of User JavaScript and CSS yet.
Walkthroughs and reviews on video.
What Is Codepen?
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using CodePen and User JavaScript and CSS. 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.
We have no reviews of User JavaScript and CSS yet. Be the first one to post
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 / 2 months 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 / 3 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 / 12 months ago
You can use such scripts on tampermonkey (chrome) or greasemonkey (for firefox) or User Javascript an CSS injector. Source: over 3 years ago
Speaking of Kbin, I made a blue theme (before) that anyone can use. Here is the CSS code. To apply it, use the chrome/brave extension called 'User JavaScript and CSS'. There are other extensions in different browsers that do the same... Source: over 3 years ago
I recommend this to use it: https://chrome.google.com/webstore/detail/user-javascript-and-css/nbhcbdghjpllgmfilhnhkllmkecfmpld. Source: over 3 years ago
When comparing CodePen and User JavaScript and CSS, you can also consider the following products.

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
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Reduce eye strain in your browser with this extension that provides a dark theme for browsing.
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Change the appearance of websites instantly. Preview and install styles created by other users on stylebot.me
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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.
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