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

Sibelius
MuseScore
Knock
Finale
Flat for Education
MuseScore.org
Guitar Pro
Online collaborative music score and tab editor, accessible from any device

Which is more popular?
Based on our record, CodeSandbox should be more popular than Flat. It has been mentioned 313 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | codesandbox.io | flat.io |
| Pricing | ||
| Platforms | — | |
| Company | Startup from The Netherlands · 1 - 9 employees · 2017 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CodeSandbox yet.
A great and easy-to-use music notation editor on iOS. Flat is an app that lets you create, edit, playback, print and export your sheet music and tabs. Cloud-based, you can also edit scores with your web browser and collaborate in real-time across devices with friends and colleagues.
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.
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.


As answered by people managing CodeSandbox and Flat.
Flat's answer:
Extremely Intuitive Layout, Collaboration feature and cross-device usage
Flat's answer:
Flat is perfect for beginners and professionals alike.
Share your experience with using CodeSandbox and Flat. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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.
We have no reviews of Flat yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


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 / 4 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 / 4 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 / 10 months ago
Unless a piece you want has been recreated or arranged on MuseScore or flat.io, you must buy your own music unless someone wants to give some old music to you. Source: over 3 years ago
I was able to do this with flat.io. Source: over 3 years ago
The web-based options are, unsurprisingly, more limited. flat.io is pretty bad, Noteflight is better but still very limited and quite bad to use. There's some more niche stuff like Unison but it might not be the most accessible. Source: over 3 years ago
When comparing CodeSandbox and Flat, you can also consider the following products.


Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Compare Sibelius to CodeSandbox or Flat:

Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.
Compare replit to CodeSandbox or Flat:

Our goal is to let musicians from all over the world create and share their works, as well as to make learning music exciting, easy and available for all.
Compare MuseScore to CodeSandbox or Flat:

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