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

Skills.sh
skills.ai
Agent Skills
AI Skills Manager
Doable.sh
SkillDepot
skillgraph
Your agent is underqualified. Upgrade its skills

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 | skillgild.dev |
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What each product offers, as listed by its team.


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Recommended for
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As answered by people managing CodePen and SkillGild.dev.
SkillGild.dev's answer:
SkillGild uses Next.js for the frontend, Go with Gin for backend services, PostgreSQL for persistent data, Redis for caching and asynchronous workloads, and containerized services for deployment. The platform is designed around API-first services, secure access control, scalable marketplace infrastructure and integrations with modern AI-agent ecosystems.
SkillGild.dev's answer:
AI coding agents are becoming increasingly capable, but developers still recreate the same prompts, instructions, tools and workflows repeatedly. At the same time, creators are building valuable agent skills with no strong distribution or monetization layer. SkillGild was created to bridge that gap — giving users a place to discover better capabilities for the agents they already use, while giving creators a marketplace to publish and monetize their expertise. Our idea is simple: your agent may already be powerful; it just needs better skills.
SkillGild.dev's answer:
SkillGild is primarily built for developers, AI coding-agent users, technical creators and teams using tools such as Claude Code, Cursor and Codex. It also serves creators who want to publish or monetize reusable agent skills, as well as agencies, educational institutions and businesses that want to distribute AI workflows to their teams or customers.
SkillGild.dev's answer:
SkillGild is built as a marketplace for reusable AI agent skills, not just a directory of prompts or GitHub repositories. Developers can discover production-ready skills for Claude Code, Cursor, Codex and other AI agents, while creators can publish, distribute and monetize their expertise. SkillGild combines discovery, creator storefronts, paid and free skills, access control, analytics and team-oriented workflows in one platform.
SkillGild.dev's answer:
SkillGild focuses on the complete lifecycle of an AI agent skill: discovery, evaluation, installation, publishing and monetization. Instead of simply indexing public repositories, SkillGild gives creators tools to build a business around their skills and gives users a structured marketplace for finding trusted, reusable capabilities across multiple AI agents.
Share your experience with using CodePen and SkillGild.dev. 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.
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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 SkillGild.dev since Oct 2026.
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