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

Warp Terminal
Ghostty
tmux
Pi Coding Agent
Termius
Claude Code
Podium.do
To coding agents what tmux is to terminals. Runs where your agents run: close the laptop, ssh from anywhere, nothing dies.

Which is more popular?
Based on our record, CodePen seems to be a lot more popular than Herdr. While we know about 513 links to CodePen, we've tracked only 20 mentions of Herdr.
Website, pricing, platforms and company facts side by side.
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| Website | codepen.io | herdr.dev |
| Pricing | — | |
| 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.


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
Herdr in about 6 minutes
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using CodePen and Herdr. 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 Herdr 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 / 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
Orca is next for me to trial https://www.onorca.dev/. - Source: Hacker News / 3 days ago
I use herdr to manage my pi sessions. My pi sessions can also use herdr to spin up other herdr sessions. I love tmux but the visual aspects of herdr work better for me. - Source: dev.to / 3 days ago
If you use herdr, tap Open in herdr on a task in the Pilothouse app and that agent appears in a herdr tab on the computer. - Source: dev.to / 4 days ago
When comparing CodePen and Herdr, you can also consider the following products.

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
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The terminal for the 21st century. Warp is a blazingly fast, rust-based terminal reimagined from the ground up to work like a modern app.
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A fast, feature-rich, and cross-platform terminal emulator
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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 Herdr:

tmux is a terminal multiplexer: it enables a number of terminals (or windows), each running a...
Compare tmux to CodePen or Herdr: