flems.io AlternativesCode Editors and other similar apps like flems.io

Apps similar to flems.io include Replit, which has a free version. Other options are CodePen, jsFiddle, JSPad and JS Bin. There's no shortage of Code Editors like flems.io, with more than 25 alternatives for the web, Android, Mac, Windows and Linux.

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Alternatives
flems.io alternatives page was last updated

Alternatives list

  1. Replit icon

    Replit

     104 likes

    Replit is a collaborative cloud development environment offering in-browser IDE features like AI assistance, real-time collaboration, Git support, hosting, deployment, syntax highlighting, plugin extensibility, ad-free UI, dark mode, and live code sharing.

    160 Replit alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Mac
    • Windows
    • US flagUnited States
    Replit screenshot 1
    Good alternative?
     
  2. CodePen icon

    CodePen

     125 likes

    CodePen is a communal front-end development platform providing real-time HTML, CSS, and JavaScript previews. Users can build projects, test code, and enhance skills through challenges. Features include Presentation Mode for conferences and a vast active community for sharing and discovery.

    71 CodePen alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • US flagUnited States
    Auto Updating Previews: As you code, the preview updates automatically. Unless you don't want it to.
    Good alternative?
     
  4. jsFiddle icon

    jsFiddle

     146 likes

    JSFiddle is an online IDE service and online community for testing and showcasing user-created and collaborational HTML, CSS and JavaScript code snippets, known as 'fiddles'.

    86 jsFiddle alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • PL flagPoland
    • European Union flagEU
    jsFiddle screenshot 1
    Good alternative?
     
  5. Ad
    Screenshot
    Replit icon
    Replit

    Replit is a collaborative cloud development environment offering in-browser IDE features like AI assistance, real-time collaboration, Git support, hosting, deployment, syntax highlighting, plugin extensibility, ad-free UI, dark m...

    https://replit.com
    Learn More
  6. JSPad icon

    JSPad

     11 likes

    JSPad is a fast and lightweight online code editor for writing, testing, and previewing HTML, CSS, and JavaScript snippets instantly.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Online
    JSPad screenshot 1
    Good alternative?
     
  7. JS Bin icon

    JS Bin

     65 likes

    JS Bin is a collaborative open source JavaScript debugging tool. Enter Javascript in one pane and HTML in the other and see the result; share using a short URL. Choose popular JS libs from a menu, so you don't have to remember the URL.

    71 JS Bin alternatives

    Cost / License

    • Freemium
    • Open Source (MIT)

    Application type

    Alerts

    • Discontinued

    Platforms

    • Online
    • GB flagUnited Kingdom
    JS Bin screenshot 1
    Good alternative?
     
  9. Pterocos icon

    Pterocos

     3 likes

    A browser-based coding environment for front-end developers. Write HTML, CSS, and JS with a VS Code-grade editor (Monaco), live preview, SCSS/TypeScript/Babel support, and an AI chat assistant for debugging and suggestions. All projects save to local storage.

    Cost / License

    Application type

    Platforms

    • Online
    Pterocos screenshot 1
    Good alternative?
     
  10. kodeWeave icon

    kodeWeave

     24 likes

    kodeWeave is a realtime coding playground for HTML, CSS and Javascript. Similar to JSFiddle and JSBin, but kodeWeave was made to work offline but also as a prototyping application to build applications for desktop operating systems while on mobile devices.

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • Chrome OS
    • Android Tablet
    The kodeWeave Web Application
    Good alternative?
     
  11. Try It Online (TIO) icon

    Try It Online (TIO)

     12 likes

    TIO is a family of online interpreters for an evergrowing list of practical and recreational programming languages.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • Self-Hosted
    Good alternative?
     
  12. Codewith.it icon

    Codewith.it

     4 likes

    Codewith.it is an online HTML, CSS and JavaScript code playground with realtime preview with many tools for developing web pages and advanced code analysis systems, with many assistance tools.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Online
    HTML, CSS and JS codes editors generate a preview on right window, with element inspector
    Good alternative?
     
  13. JSitor icon

    JSitor

     19 likes

    JSitor is an online tool for testing and showcasing user-created and collaboration HTML, CSS, JavaScript and NodeJS snippets.

    Cost / License

    • Paid
    • Proprietary

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • iPad
    • Software as a Service (SaaS)
    • jsFiddle
    • JS Bin
    • CodePen
    • IN flagIndia
    JSitor screenshot 1
    Good alternative?
     
  14. NitroIDE icon

    NitroIDE

     1 like

    NitroIDE is a free, open-source browser-based IDE for HTML, CSS, and JavaScript. Everything runs client-side in your browser with an instant live preview: no signup, no servers, no install, and your code never leaves your machine.

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Online
    • IN flagIndia
    NitroIDE homepage — zero-latency, client-side IDE running entirely in the browser.
    Good alternative?
     
  15. fastpen icon

    fastpen

     2 likes

    Fastpen is an open source alternative to codepen that just stores the source code compressed, in the url.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Online
    Desktop view
    Good alternative?
     
12 of 25 flems.io alternatives