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

Everfit
My PT Hub
FitSW
FitBudd
WeStrive
eFitnessTracker
EZIA Coach
World's best platform for workout logging and workout plans

Which is more popular?
Based on our record, CodePen seems to be a lot more popular than Exercise.com. While we know about 513 links to CodePen, we've tracked only 4 mentions of Exercise.com.
Website, pricing, platforms and company facts side by side.
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| Website | codepen.io | exercise.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
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
What Is Codepen?
More videos
Exercise.com Review
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using CodePen and Exercise.com. 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.
If you want a gym membership software that feels truly your own, Exercise.com is hard to beat. Unlike most gym billing software that comes with fixed templates, Exercise.com allows you to build fully custom-branded...
1. GymRoute – the best gym software of 2025 (top pick)2. Exercise.com – the most customisable platform3. Mindbody – best for wellness and hybrid studios4. Glofox – best for boutique fitness studios5. Zen Planner –...
Exercise.com is an all-in-one platform powering the next generation of fitness businesses. It includes everything you need to manage your fitness studio, gym, personal training business, or wellness center through our...
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 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
If you don't use exercise.com what do you use? Source: about 4 years ago
These are all features that the exercise.com should offer...... But they don't. Source: about 4 years ago
It doesn't seem that severe tbh. They payed quite some cash for him to come work for them at exercise.com, another website they were developing at the time and he dropped out after 9 months to work full-time on Lichess. Some grudges were... Source: over 4 years ago
When comparing CodePen and Exercise.com, you can also consider the following products.

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
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A platform for personal trainers to train clients online
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The World's #1 Software For Personal Trainers.
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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.
Compare GitHub to CodePen or Exercise.com:

App for personal trainers. FitSW personal training software helps fitness coaches easily build workout & meal plans, track client progress, & more on any device.
Compare FitSW to CodePen or Exercise.com: