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

ToolKitKE
Intious
Omni Calculator
calculator.net
CodeKitHub
Practical Tools
A.Tools
Free online calculator tools — pro rata, salary, insurance and more

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 | codepen.io | toolcr.com |
| 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
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CodePen and ToolcR.
ToolcR's answer:
ToolCR offers completely free calculator tools with no sign-up required. It specializes in pro rata calculations for salary, insurance, rent and holiday entitlement — all in one place.
ToolcR's answer:
ToolCR is 100% free, no registration needed, mobile friendly, and covers a wide range of pro rata and insurance calculations that other tools don't offer together.
ToolcR's answer:
HR professionals, employees, landlords, insurance agents, and freelancers in the US and UK who need quick and accurate pro rata calculations.
ToolcR's answer:
ToolCR was built to provide free, easy-to-use calculator tools for everyday financial and insurance calculations — accessible to anyone without barriers.
ToolcR's answer:
WordPress, JavaScript, HTML, CSS.
ToolcR's answer:
HR professionals Insurance agents Landlords Freelancers Employees
Share your experience with using CodePen and ToolcR. 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 ToolcR 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 / 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
Tracking ToolcR since Apr 2026.
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