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

Swift Galleries
Preveal
ArtPlacer
PictureThat
Design and visualize your gallery wall with personal photos and true-to-scale frame sizes. Use AI to auto-arrange layouts instantly and preview how everything fits before you hang or buy.

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.
|
|
|
|
|---|---|---|
| Website | codepen.io | gallery-planner.com |
| 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.
GalleryPlanner is a local-first web app for planning gallery walls with real measurements, real frame sizes, and your own photos. Instead of guessing on the floor and hoping it translates to the wall, you can set your exact wall dimensions, add your frame inventory, and design layouts to the inch...
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
No GalleryPlanner 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.


As answered by people managing CodePen and GalleryPlanner.
GalleryPlanner's answer:
GalleryPlanner blends precision + privacy + AI in one tool.
Bottom line: it is not just a mood-board app, it is a practical planning workflow from idea to install.
GalleryPlanner's answer:
Choose GalleryPlanner if accuracy and execution matter.
Compared with tools like ArtPlacer and other broad visual planners, GalleryPlanner is optimized for people who want to actually hang the wall confidently.
GalleryPlanner's answer:
Primary audience: people planning real gallery walls in real homes.
It is especially useful for anyone who wants a measurable plan, not just visual inspiration.
GalleryPlanner's answer:
GalleryPlanner was created by Tim Straub, a data scientist, after a real home project: turning a growing family frame collection into a clean wall layout with exact spacing.
Existing options did not meet two core needs:
So he built GalleryPlanner as a local-first, measurement-accurate planner for practical, confidence-first installs.
GalleryPlanner's answer:
Core stack
Feature stack
GalleryPlanner's answer:
Share your experience with using CodePen and GalleryPlanner. 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 GalleryPlanner 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 GalleryPlanner since Feb 2026.
When comparing CodePen and GalleryPlanner, you can also consider the following products.

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
Compare JSFiddle to CodePen or GalleryPlanner:

Wall gallery design and sales software for photographers.
Compare Swift Galleries to CodePen or GalleryPlanner:



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.
Compare GitHub to CodePen or GalleryPlanner:

ArtPlacer’s accurate previews of art in place, 3D virtual exhibitions and website integrations, help art professionals make the most out of their online presence.
Compare ArtPlacer to CodePen or GalleryPlanner: