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

Sitechecker
Pulno
LinkChecker
Fast Link Checker
Screaming Frog SEO Spider
Website Grader
Dead Link Checker
Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.

Which is more popular?
Based on our record, CodePen seems to be a lot more popular than Checkbot. While we know about 513 links to CodePen, we've tracked only 4 mentions of Checkbot.
Website, pricing, platforms and company facts side by side.
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| Website | codepen.io | checkbot.io |
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| Listed in |
In their own words, as submitted to SaaSHub.


No description of CodePen yet.
Checkbot is a Google Chrome extension that will boost the SEO, speed and security of your website by checking your site follows 50+ web best practices. In a couple of clicks, you can check 1,000s of pages for broken links, duplicate content, invalid HTML/CSS/JavaScript, insecure password forms,...
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
Checkbot is recommended for web developers, SEO specialists, digital marketers, and website owners who want to ensure their sites are optimized for search engines, perform efficiently, and adhere to security best practices. It's also beneficial for anyone who prioritizes a streamlined and automated way to identify and fix web-related issues.
Walkthroughs and reviews on video.
What Is Codepen?
More videos
No Checkbot 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.


Share your experience with using CodePen and Checkbot. 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.
CheckBot (Free Plan) - A free efficient SEO chrome extesnion to crawl all your website pages from inside your broswer and gives you comprehensive SEO, web speed, and security insights. Over 50 tools to quickly check...
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
Location: Edinburgh, UK Remote: Yes (I’m used to time zone differences and async work) Willing to relocate: No Technologies: Figma, Sketch, TypeScript, JavaScript, Vue, Hugo, Jekyll, WordPress, Django, HTML/CSS, Bootstrap, Tailwind,... - Source: Hacker News / 5 months ago
SEEKING FREELANCE WORK | UX/UI & web design Location: Edinburgh, UK Remote: Yes (I’m used to time zone differences and async work) Willing to relocate: No Technologies: Figma, Sketch, TypeScript, JavaScript, Vue, Hugo, Jekyll, WordPress,... - Source: Hacker News / 10 months ago
SEEKING WORK | UX/UI & web design Portfolio: https://seanw.org/ Live example projects: https://checkbot.io/ https://inclusivecolors.com/ Location: Edinburgh, UK and remote (I’m used to time zone differences and async work) --- I help... - Source: Hacker News / over 1 year ago
When comparing CodePen and Checkbot, you can also consider the following products.

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
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All-in-one SEO platform including rank tracker, website SEO audit tool and website changes monitoring. Detailed reports by 100+ parameters with how-to-fix guides.
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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.
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LinkChecker is a free, GPL licensed website validator.
Compare LinkChecker to CodePen or Checkbot: