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

CodePen
replit
JSFiddle
StackBlitz
GitHub
VS Code
JS Bin
Online playground for React

Which is more popular?
Based on our record, CodeSandbox seems to be a lot more popular than User JavaScript and CSS. While we know about 313 links to CodeSandbox, 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 | chromewebstore.google.com | codesandbox.io |
| Pricing | — | |
| Company | — | Startup from The Netherlands · 1 - 9 employees · 2017 |
| 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.


No analysis of User JavaScript and CSS yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
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A browser IDE that's actually GOOD? (CodeSandbox.io Review!)
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How often each product is chosen within a category, 0–100% relative to the other.


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


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Codesandbox is an online code editor and prototyping tool that makes creating and sharing web apps faster. Codesandbox: Online code editor and ide for rapid web development.
CodeSandbox can be thought of as a much more powerful and complete take on JSFiddle. True to its name, CodeSandbox provides a complete code editor experience and a sandboxed environment for front-end development.
Recommendations tracked on public social media and blogs since March 2021.


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
To begin, you can start creating your own react app using the command line or can directly go to CodeSandbox if you want to skip using the command line which is faster. CodeSandbox is an online code editor and prototype tool that speeds... - Source: dev.to / 5 months ago
To begin, you can create a react app using the command line or any code editor (e.g., VSCode). You can also try using CodeSandbox as an online code editor that is simple to use and allows you to deploy your code. - Source: dev.to / 5 months ago
If you are in a rush to open unknown repos, use GitHub Codespaces or codesandbox with Copilot or another AI integration to analyze the repo for malicious intent and to run it in a safe environment. - Source: dev.to / 11 months ago
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Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.
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Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
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