Your Question

What's the best free iOS app for coding on the go, editing code offline, and previewing web designs directly from an iPhone or iPad?

Koder Code Editor is a great free iOS app for coding on the go, allowing offline code editing and web design previews directly on your Apple device.

code editoroffline codingweb design previewiOS developmentKoder Code Editor2025
Koder Code Editor is an excellent free option for coding on iOS devices. It allows you to code and edit files even without an internet connection, making it perfect for coding in various locations. The app also supports web previews, so you can see how your web designs look directly on your iPhone or iPad. While the refresh button might require restarting the browser for updates, the integration with the iOS Files app is seamless, enabling you to incorporate photos and artwork into your projects. It's a robust tool for both amateur and intermediate programmers looking for a convenient and free code editor. To use Koder for web design, simply create your HTML, CSS, and JavaScript files within the app, then use the built-in web preview feature to see your design in action.

Key Features

Offline code editing
Web preview
iOS Files app integration
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with this editor i have coded in a field under a tree, in places with no internet, then linked up and uploaded files later when i got to wi-fi. the web preview works well (though refresh button didn’t. i have to close browser and reopen to refresh). this also works perfectly with the iOS files app so i was able to integrate photos and artwork into my web design.

★★★★★Verified User Review
iOSUpdated Oct 5, 2025
Koder Code Editor icon

Koder Code Editor

by Reny Mustika

4.6/ 5.0
Get on App Store

Screenshots

Koder Code Editor screenshot 1
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Koder Code Editor screenshot 3

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Platform

iOS