How To Create A Content Sized Webview In .NET MAUI Mobile A Step By Step Guide

This post by Alberto tackles a surprisingly common UI limitation in .NET MAUI: the inability of the built in WebView to size itself based on its HTML content. The author begins by outlining real world scenarios where this becomes painful, such as embedding web generated content inside scrollable layouts or virtualized lists. Rather than accepting fixed dimensions, the article proposes a custom ContentSizedWebView that can measure its content and participate correctly in the MAUI layout system.

From there, the walkthrough gets hands on. You will see how to prepare HTML for proper scaling, create a derived WebView control, and wire up platform specific handlers for both iOS and Android. The iOS approach leverages the underlying scroll view for straightforward measurement, while the Android solution uses injected JavaScript and a ResizeObserver to report content size back to MAUI. The result is a cross platform control that can trigger layout updates whenever the web content changes.

If you have ever struggled to make WebView behave inside dynamic MAUI layouts, this deep technical guide is well worth your time.