Omni Calculator
World Time Buddy
calculator.net
Every Time Zone
clocks.life
Time.is
PrintCalendar.top
Free time & date tools: world clock, timezone converter, date calculator, holidays, moon phases, and sunrise times. Fast, accurate, no sign-up needed.

JSFiddle
CodeSandbox
GitHub
replit
VS Code
Pastebin.com
JS Bin
A front end web development playground.
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 | timeandtool.com | codepen.io |
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In their own words, as submitted to SaaSHub.

TimeandTool is a free, all-in-one platform for time and date utilities, built for global users, teams, and developers. It combines 50+ interactive tools including a world clock across 700+ cities, timezone converter, meeting planner, date and time calculators, public holiday calendars, and...
No description of CodePen yet.
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
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How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing TimeandTool and CodePen.
TimeandTool's answer
TimeandTool started from a simple problem — most time and date websites are either outdated or overloaded with ads. The idea was to build a cleaner, faster alternative that handles everything in one place, while also supporting developers and modern use cases.
TimeandTool's answer
TimeandTool brings together multiple time and date use cases into one place instead of spreading them across different tools. It covers everything from timezone conversion and calendars to astronomy data and developer APIs. The platform is built for speed, works without sign-up, and focuses on making common time-related tasks quick and reliable.
TimeandTool's answer
Most existing tools are either outdated, slow, or limited to a single use case. TimeandTool offers a faster and more modern experience with a wider range of tools in one platform. It also includes features like a public API and structured data support, which many traditional time websites don’t provide.
TimeandTool's answer
TimeandTool is mainly used by people who regularly deal with time across regions. This includes remote teams, developers, travelers, and anyone who needs accurate time, date, or calendar information without wasting time switching between multiple tools.
TimeandTool's answer
TimeandTool is built using modern web technologies including Next.js, a PostgreSQL database, and edge-based deployment for fast global performance. Timezone data is based on the IANA database, and astronomical calculations are handled using precise mathematical models implemented in TypeScript.
TimeandTool's answer
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External articles and on-site reviews we used to compare the two products.

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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.
Recommendations tracked on public social media and blogs since March 2021.

Tracking TimeandTool since Apr 2026.
> 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
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