
CodeSignal
Codility
HackerRank
HackerEarth
coderpad
eSkill
iMocha
Technology for IT skill testing. Solution dedicated to automated skill testing in recruitment, programming contests and education.

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

Which is more popular?
Based on our record, CodePen seems to be more popular. It has been mentioned 513 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | sphere-engine.com | codepen.io |
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What each product offers, as listed by its team.


No features have been listed yet.
Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Sphere Engine yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
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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 Sphere Engine and CodePen. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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


Tracking Sphere Engine since Mar 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 / 3 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 / 4 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 / about 1 year ago
When comparing Sphere Engine and CodePen, you can also consider the following products.

CodeSignal is the leading assessment platform for technical hiring.
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Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
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Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.
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HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Compare HackerRank to Sphere Engine or CodePen:

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 Sphere Engine or CodePen: