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CodePen @codepen.io · 15h
The final week of our September challenge is on! This week, you'll chart your own course 🗺️ codepen.io/challenges/2... Thanks @MongoDB for sponsoring! srv.buysellads.com/ads/long/x/T...
A nautical map with charting tools laid on top.
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Shaw @shaw.city · 28/09/2026
Blocks and Files combine to form the ultimate power and flexibility of @codepen.io 2.0. This is a great example: One user file, script.test.js, and yet there's still a Preview... showing the test results!
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CodePen @codepen.io · 28/09/2026
"Globe Spinners" by Jon Kantner codepen.io/editor/jkant...
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Amit Sheen @amitsheen.bsky.social · 24/09/2026
Wavy illusion 〰️ The cyan and magenta lines are the same length and do not change at all. 😵 (CSS only) 🔗 Live demo on @codepen.io: codepen.io/editor/amit_...
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Shaw @shaw.city · 23/09/2026
🕒 Class starts in 3 hours! If you're one of those "do homework right before the bell" kind of folks, this is your time. ✍️
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CSS by T. Afif @css-only.dev · 22/09/2026
💡CSS Tip! Creating CSS Shapes is one of my favorite tasks, and now I can do something even better: Random CSS Shapes! Let's start with Blobs. css-tip.com/random-blob/ You never see the same shape twice. A unique shape for a unique experience! 👀
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Amit Sheen @amitsheen.bsky.social · 21/09/2026
Bounce! 🏐 (CSS only) Live demo @codepen.io: codepen.io/editor/amit_...
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Ben Evans @ivorjetski.bsky.social · 17/09/2026
It's the 2026 LED ART CSS Challenge! 🥳 I've created an LED experiment! Fork the @codepen.io, Do something cool! The most creative & maddest will feature in my next YouTube. tinyurl.com/56cpxceh tinyurl.com/3y6tuv58 #CSSChallenge #CodePen #WebDev #CreativeCoding #CSSArt #LEDArt #FrontEndDev
tinyurl.com
CSS LED ART CHALLENGE!
So here is the plan: Fork it on CodePen, or screenshot your browser! https://codepen.io/editor/ivorjetski/pen/01a07dcf-a1e8-7ab6-aea1-aa98135803b3 - Mess with the code - Draw something amazing live in the browser and screenshot it - Hack to pieces and create a monster Send me your art! Add the tag #ledart on CodePen or @ me on X, Bluesky, Insta or where ever, find me and @ me. @ivorjetski My next video will feature all the best and maddest creations. Good luck! Your time starts now! P.s. you can find a bit more info here: https://dev.to/ivorjetski/css-led-art-challenge-5e6b And as usual, video, music and art all produced by me @ivorjetski Or just say hi: https://linktr.ee/ivorjetski
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Thea 👩🏻‍💻🐱💙💛 @highflyer910.bsky.social · 16/09/2026
A little color for your feed ✨ My bokeh background got picked on @codepen.io 😊 codepen.io/editor/HighF...
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Chris Coyier @chriscoyier.net · 15/09/2026
This GIF from @joshwcomeau.com's last email is mesmerizing. Here's the border-shape he made of that codepen.io/editor/joshw...
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Shaw @shaw.city · 16/09/2026
Don't be late for class. 🧑‍🏫 @codepen.io School: Live in 10 minutes. youtube.com/live/BFvGpJT...
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CodePen School: Round Two
YouTube video by CodePen
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CodePen @codepen.io · 15/09/2026
Our Charts & Graphs challenge continues! This week, we're baking up pie and donut charts 🍩 codepen.io/challenges/2... Thanks @MongoDB for sponsoring! srv.buysellads.com/ads/long/x/T...
A gorgeous apple pie with crumb topping and one slice missing.
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Chris Bolson @cbolson.bsky.social · 15/09/2026
A CSS-only circular nav using experimental `::scroll-*`, `animation-timeline: scroll()` and anchor positioning. Scroll drives the items around the circle, with anchors handling the current label and prev/next controls. ⚠️ Chromium only. See the demo on @codepen.io: codepen.io/editor/cbols...
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CodePen @codepen.io · 14/09/2026
"3D Rowing Boat" by Grant Jenkins codepen.io/editor/grant...
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Ben Evans @ivorjetski.bsky.social · 10/09/2026
It's the 2026 LED ART CSS Challenge! 🥳 I've created an LED experiment... Do something cool! The most creative and maddest will feature in my next YouTube. Your time starts now... youtube.com/watch?v=wHcJ... codepen.io/editor/ivorj...
youtube.com
CSS LED ART CHALLENGE!
YouTube video by Ben Evans
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Arman Borkhani @armanborkhani.bsky.social · 11/09/2026
200 followers on @codepen.io 🎉 To celebrate, I made a new Pen where the number 200 is created entirely with CSS. codepen.io/editor/arman... #CSS #CodePen #CreativeCoding
codepen.io
200 - Made with CSS
Celebrating 200 followers on CodePen with a little CSS experiment. This “200” is created entirely with CSS. Thanks to everyone who followed, liked, an
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CodePen @codepen.io · 11/09/2026
Live streamin' soon! (10am Pacific) I think we're gonna call it CodePen School. We hang out, build stuff, look at interesting things, try to be educational, etc. YouTube: youtube.com/live/ioOYSdv... Twitch: www.twitch.tv/codepen
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CodePen School | Q&A, Live Coding, Tutorials & More
Share your questions and hang out with the Cool Teachers at CodePen School. Like office hours with your favorite professor, but actually fun.🧑‍🏫🏫🧑‍🏫
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CodePen @codepen.io · 11/09/2026
> Voting is now open for the Tiny Awards 2026! tinyawards.net > The Tiny Awards exist because we thought it was important to shine a spotlight on the sorts of personal web projects that tend to get overlooked by more traditional, larger or more commercial awards.
tinyawards.net
Tiny Awards
This is the home of the Tiny Awards, which, since 2023, has celebrated the best of the small, poetic, creative, handmade web.
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Cassidy @cassidoo.co · 10/09/2026
Did a little CSS speedrun experiment (thanks @lea.verou.me for putting it on my feed)! codepen.io/editor/cassi...
codepen.io
Blur experiment within div
A code demo by Cassidy created on CodePen
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Bramus @bram.us · 10/09/2026
TIL that @codepen.io supports Mermaid Diagrams … and also TIL that there is no custom element to easily include these in your markup … so I built one (assisted by Antigravity). → brm.us/mermaid-elem...
brm.us
Introducing <mermaid-element>, a custom element to display Mermaid diagrams
Today I learned that CodePen supports Mermaid diagrams — Chris Coyier has a a whole collection with examples here — and I also learned that there is no custom element to easily include these in your markup … so I built one.
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CodePen @codepen.io · 10/09/2026
Just in case it's ever useful.... you can just [copy] some HTML and [paste] it into Gmail. Pretty darn easy way to send an HTML email. www.youtube.com/watch?v=DsVX...
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TRICK! You can just PASTE an HTML email into Gmail
It's just that easy.
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CodePen @codepen.io · 09/09/2026
"GSAP Flix+" by mike-at-redspace codepen.io/editor/mike-...
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Shaw @shaw.city · 08/09/2026
New on @codepen.io: 🖐️✊ Draggable Panels 🖐️✊ Try dragging & dropping a Sidebar Panel into the Editors for even more ways to customize the UI. Great to combine with Minimal UI when you still want certain Panel content easily visible. www.youtube.com/watch?v=fcPe...
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CodePen @codepen.io · 08/09/2026
The September CodePen Challenge is on! This month, we're working with Charts & Graphs, starting with a Flowchart codepen.io/challenges/2... Thanks @MongoDB for sponsoring!: srv.buysellads.com/ads/long/x/T...
A person drawing a flowchart on a whiteboard with a red marker.
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Brecht De Ruyte @utilitybend.com · 08/09/2026
🚀 Container style queries are baseline; New attr() capabilities are nearly there. Neat apart, but together they change how we can wire up components. Practice will make perfect, and I still need to rewire my brain for this combo. So, time to start that rewire. utilitybend.com/blog/contain...
utilitybend.com
Container style queries and advanced attr(): rethinking how to wire up my components in CSS | utilitybend
Wiring HTML attributes into CSS with advanced typed attr(), and letting container style queries pass that state down to child components.
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Adirs Code @adirs.co · 07/09/2026
Jumping Cactus Animation, Made in SVG Studio, Original illustration by @vandubovik.bsky.social #web #animation #tech CodePen link in the comments below 👇
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CodePen @codepen.io · 03/09/2026
"E(tch a sketch)mail - Signature" by Gymnase codepen.io/editor/gymna...
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Zach Saucier @zachsaucier.com · 02/09/2026
My first @codepen.io in a while: Responsive container query cards! codepen.io/editor/ZachSaucier/pen/01a05faf-7fd6-77fe-89a9-47a67289313d
codepen.io
Responsive visual cards - container queries
Blank slate for you to craft your own world. There's basic HTML to link up all the files, but otherwise it's all up to you!
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Maikel Krause @maikelkrause.bsky.social · 01/09/2026
#CSS `progress()` is now baseline! 🥳 I was trying to see if this could be used as a workaround for the lack of typed arithmetic (unit division) in Firefox, and it does work, sort of. codepen.io/editor/maike... (And yes I know there's already the `tan2(atan())` trick, but that has its own bugs.)
codepen.io
CSS typed arithmetic using progress()
A code demo by Maikel Krause created on CodePen
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CodePen @codepen.io · 02/09/2026
"CSS 8" by Stijn Van Minnebruggen codepen.io/editor/donot...
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CodePen @codepen.io · 28/08/2026
"3D Dancing Bugs" by Grant Jenkins codepen.io/editor/grant...
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Kevin Powell @kevinpowell.co · 28/08/2026
Anchor positioning makes this type of effect feel almost too easy to make now. If you want the long-form where I break it down in more detail, you can find it here: youtu.be/8_NQ7ARXz8c
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CodePen @codepen.io · 25/08/2026
TanStack Charts! tanstack.com/charts/latest Works just lovely on CodePen codepen.io/editor/team/...
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Amit Sheen @amitsheen.bsky.social · 25/08/2026
Yet another cool effect inspired by the one and only @akiyoshikitaoka.bsky.social. It’s incredible how our brains ‘fill in’ the outlines, even the curvy ones. 😵‍💫 (Made with CSS only, of course) 🔗 Live demo on @codepen.io: codepen.io/editor/amit_...
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CSS by T. Afif @css-only.dev · 24/08/2026
Did anyone already mention "Dark mode with spotLight"? No!? That's the only valid way. Demo: codepen.io/t_afif/pen/Y... via @codepen.io Debating about toggles? Well, I don't understand ...
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CodePen @codepen.io · 24/08/2026
"Analog Email Alert" by Zerde Turdybek codepen.io/editor/zerde...
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CodePen @codepen.io · 20/08/2026
Hosting images on CodePen is, like, pretty good actually. (Quick video on the superpowers: www.youtube.com/watch?v=ANw0...)
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Hosting Your Images is Eeeaasssyyy (and powerful with autoformatting, resizing, and quality control)
CodePen can host images right in your Pen. Or, you can use Global Asset Hosting to provide easy access to the image from any Pen (or anywhere) and it includes the ability to serve the best-format…
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Chris Heilmann @codepo8.bsky.social · 18/08/2026
Remember kids: Maths is beautiful. codepen.io/editor/codep...
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Kevin Powell @kevinpowell.co · 18/08/2026
Subgrid can be a little finicky to work with at times, but if you have something with a fixed layout with variable amounts of content in that layout, it really shines.
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MJML @usemjml.bsky.social · 17/08/2026
The launch emails for Codepen 2.0 were built with MJML and it's now available as a processor block inside Codepen too! 💪
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Amit Sheen @amitsheen.bsky.social · 15/08/2026
Div Shuffling... (CSS Only) Anyone who knows me knows how much I love playing with cards, and I've wanted to do something like this for a long time. ☺️ Live on @codepen.io: codepen.io/editor/amit_...
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CodePen @codepen.io · 13/08/2026
A PRO feature on CodePen is that the Live Preview URL you see right in the CodePen Editor you can pluck out and open in as many URLs and devices as you like. It's nice for multi-monitor setups, cross-browser testing, real device testing, etc.
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CodePen @codepen.io · 12/08/2026
Our email challenge continues! This week, we're creating email alerts 🔔 codepen.io/challenges/2... Thanks @PagerDuty for sponsoring: srv.buysellads.com/ads/long/x/T...
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Stuart Robson @sturobson.com · 11/08/2026
TIL (well, from last weeks Shop Talk Show) command + K in CodePen but today I learned command + K and 'fork pen in in new tab' :swoons:
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Josh Dillon @j-dillon.bsky.social · 11/08/2026
This week I'm sharing a set of custom glitchy radio buttons animated with an SVG displacement filter and @gsap-greensock.bsky.social rough easing on @codepen.io: codepen.io/editor/jdill... #JS #SVG #GSAP
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Kevin Powell @kevinpowell.co · 07/08/2026
I'm sure you already heard about the big update to @codepen.io. If you're still trying to work your way around it @chriscoyier.net sat down with me to walk me through all of the changes. youtu.be/q_0RweY2VJc
youtu.be
CodePen just got a HUGE upgrade
YouTube video by Kevin Powell
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Stuart Robson @sturobson.com · 06/08/2026
🎉 new post! Dynamic Colour Schemes With Modern CSS What magical CSS can we use to create not just a quick and dirty colour palette, but a whole colour scheme? Anogulous? Complementary? Triadic? It's all here! www.alwaystwisted.com/articles/dyna… 🙏🖤
alwaystwisted.com
Dynamic Colour Schemes With Modern CSS
A practical walkthrough of building dynamic, theme-aware colour schemes in CSS with custom properties, OKLCH, color-mix(), and contrast-color().
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CodePen @codepen.io · 06/08/2026
Just noting a simple multi-page website with a shared header and footer is just a couple of Nunjucks includes away. codepen.io/editor/team/...
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CodePen @codepen.io · 05/08/2026
The August CodePen Challenge is on! This month, we're building email 📧 codepen.io/challenges/2... Thanks @pagerduty for sponsoring! srv.buysellads.com/ads/long/x/T...
A sign shaped like a paper plane leaning against a brick wall.
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CodePen @codepen.io · 05/08/2026
In which Bramus learns that MDN publishes their page view data publicly, builds a website, and deploys it on CodePen. Site: ready-unit-fowl.codepen.app Blog post: www.bram.us/2026/08/03/m...
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