fastpen is described as 'Fastpen is an open source alternative to codepen that just stores the source code compressed, in the url' and is a Code Editor in the development category. There are more than 25 alternatives to fastpen, not only websites but also apps for a variety of platforms, including Self-Hosted, Android, Mac and Windows apps. The best fastpen alternative is Replit, which is free. Other great sites and apps similar to fastpen are jsFiddle, CodePen, JSPad and JS Bin.
JSitor is an online tool for testing and showcasing user-created and collaboration HTML, CSS, JavaScript and NodeJS snippets.
JSitor is the most popular SaaS alternative to fastpen.
Find, create, or share awesome apps that work right here in your browser. And for developers, join the #1 platform to build, distribute, and monetize web-based apps.
Flems is a playground for web development. It's ideal for prototyping ideas & sharing working front-end code examples.
snippet.host is a minimal text and code snippet hosting. With memorable domain name, it is free, lightweight, with no ads or cookies. Features include syntax highlighting in multiple languages, easy-to-use API and Tor hidden service support.
Plunker is an online community for creating, collaborating on and sharing your web development ideas.
Codiad is an open source, web-based, cloud IDE and code editor with minimal footprint and requirements
Compile and Execute your favorite programming languages online, click any of the following to proceed! Web Technologies, Text Formatting, Useful Utilities, Programming Languages. Vim, emacs modes are avaliable.
TIO is a family of online interpreters for an evergrowing list of practical and recreational programming languages.
Simple Code Editor for playing with Javascript and Conducting Interviews. New alternative for JSBin and JSFiddle.
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