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

Domains Monitor
zonefiles.io
Newly Registered Domains Lists
DomainTools
Domain-Monitor.io
WhoisXML API
Domains Index
Daily updated lists of registered domain names, downloadable domain datasets. WHOIS and Reverse-DNS datasets.

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.
|
|
|
|
|---|---|---|
| Website | codepen.io | netapi.com |
| Pricing | — | |
| Company | — | Startup from Cyprus |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CodePen yet.
Lists of 400M+ classic and country domains, WHOIS data, and reverse DNS lookup. Lists of newly registered and expired domains. Daily updated domain datasets. Accessible manually or via a simple API.
What each product offers, as listed by its team.


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
No NetAPI videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CodePen and NetAPI.
NetAPI's answer:
We monitor 400mln+ domain names in 1,390 domain zones (including country codes), and our datasets are updated daily.
NetAPI's answer:
World-biggest domain database and robust API
Share your experience with using CodePen and NetAPI. 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 NetAPI 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 / about 1 month 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 / 2 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 / 11 months ago
Tracking NetAPI since Dec 2025.
When comparing CodePen and NetAPI, you can also consider the following products.

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

List of all active domains in all zones. Registered domains database with daily updates, contact details and powerful API. ccTLD and gTLD zones with contacts and details.
Compare Domains Monitor to CodePen or NetAPI:


List of registered domain names updated daily
Compare zonefiles.io to CodePen or NetAPI:

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 NetAPI:

Domain Index’s Newly Registered Domains List is an extensive daily compilation of newly registered domain names as they appear in the Domain Name System (DNS).
Compare Newly Registered Domains Lists to CodePen or NetAPI: