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

HorseHub
Sticky Notes
Stick A Note
Simple Sticky Notes
Sticky Notes Widget +
Sticky note task tracker
Stable Reminders
TackNote pins a note to a specific window, tab, document, folder, chat, or task — and shows it only when you're looking at that exact thing. No clutter. The right note, in the right place.

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 | tacknote.app |
| Pricing | — | |
| Platforms | — | |
| Company | — | Startup from the United States · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of CodePen yet.
TackNote is a Mac sticky-note app with a twist: every note pins to the exact thing you're working in — a specific window, browser tab, document, folder, chat, or task — and only appears when you're there. Switch away and it tucks out of sight; come back and it's waiting, right where you left it....
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
TackNote
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing CodePen and TackNote.app.
TackNote.app's answer:
A native macOS app built in Swift and AppKit, with CloudKit for optional end-to-end-encrypted iCloud sync. No web wrappers, no third-party trackers
TackNote.app's answer:
Most sticky notes just pile up on your desktop. TackNote pins each note to the exact thing you're working in — a window, browser tab, document, folder, chat, or task — and shows it only when you're there. Switch away and it tucks out of sight; come back and it's waiting. The right note, in the right place, automatically.
TackNote.app's answer:
Context-aware — notes follow your windows, tabs, and docs instead of cluttering the desktop - Private by design — end-to-end encrypted, notarized by Apple, no account required - Fair pricing — 14-day free trial (no card), then a one-time $24.99, no subscription - Native Mac app — fast and light, not an Electron wrapper - Plus checklists, voice notes, reminders, projects, and 12 themes.
TackNote.app's answer:
Mac users who juggle multiple projects, research, or workflows and want quick reference notes tied to context — developers, writers, researchers, students, and anyone tired of a desktop buried in stale stickies or one endless note list.
TackNote.app's answer:
Early one morning I needed to remind myself to push a sandbox site to production, but not at peak traffic, so it had to wait. I had nowhere clean to put the reminder. My only option was a floating sticky note that would get buried under all my open windows the second I started working.
Then it hit me: what if I could tack the note to the push window itself? So, the next time I opened it, the reminder would be right there waiting!
That's TackNote. Every note pins to the exact window, tab, or document it's about, and shows up only when you're there.
Share your experience with using CodePen and TackNote.app. 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 TackNote.app 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 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 TackNote.app since Jun 2026.
When comparing CodePen and TackNote.app, you can also consider the following products.

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
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Horse care and livery yard management app for iOS, Android and web. Track health records, worming, farrier and vet visits, feed schedules and costs, with reminders and a yard dashboard for livery yards.
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Sticky Notes is an integrated feature of adding notes in the Windows operating systems.
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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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Stick a text note to a window of program or document.
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