YouTube Summarizer Not Working on Android? Causes and Fixes (2026)

Quick answer: Android is a better situation than iPhone but worse than desktop. Chrome for Android does not support extensions at all, so any extension-based summarizer is unavailable there — but unlike iOS, Android does have browsers that support them, and web-based summarizers work everywhere. If your summarizer "stopped working" when you picked up your phone, it never worked there; the extension simply was not present.

Why the extension you use on desktop is not on your phone

Chrome for Android has never supported the extension ecosystem that desktop Chrome has. That is a deliberate platform decision, not a gap that a setting or a beta channel will close for you. So Eightify, Glasp, Monica, HARPA, Merlin, Glarity, Sider and every other extension-based summarizer are simply absent when you open YouTube on an Android phone in Chrome.

This surprises people because the tool is right there on their laptop, and the mental model is that a browser is a browser. It is not — extension support is the dividing line.

What Android can do that iPhone cannot

Some Android browsers do support extensions, which gives Android users an option iOS users do not have. If you are committed to an extension-based workflow on mobile, that is the route. Be realistic about the trade: you are switching your daily browser to accommodate one tool, the mobile extension experience is generally rougher than desktop, and extensions built for desktop layouts often behave oddly on a narrow screen.

The share-sheet approach and its limits

The YouTube app's Share button gives you the video URL, which you can paste anywhere. This works well with any web-based tool: share, copy the link, open the tool, paste. It works badly with extension-based tools, because there is nothing to paste the link into — the extension only exists inside a desktop browser page.

One practical note: share links sometimes arrive with tracking parameters attached. Any reasonable tool handles that, but if a paste fails, trimming the URL back to the plain watch link is worth trying.

Causes unrelated to Android

Before assuming the platform is the problem, rule out the causes that affect every device:

• No caption track. Check the video on desktop via the three-dot menu → Show transcript. If it is missing, no tool works anywhere. See "no transcript available".
• A restricted video. Private, members-only and most age-restricted uploads do not expose captions to third parties — details here.
• A very long video. Expect thinning past the opening rather than an explicit error, on any device. See summaries cut off on long videos.
• Free-tier limits. Daily and weekly caps apply the same on mobile as on desktop, and often surface as a control that does nothing rather than a clear message.

Data saver and background restrictions

Aggressive battery optimization and data-saver modes can interrupt requests that take a while to complete, and summarizing a long video is exactly that. If a summary fails partway on mobile but succeeds on the same video on desktop, try disabling data saver for the browser and keeping the screen on while it processes.

What works reliably on Android

A web-based summarizer, because there is no extension in the equation. YT Summarizer runs in whatever browser you already use — share the video from the YouTube app, paste the link, and get an overview, key points and takeaways in about a minute. Nothing to install, nothing to switch browsers for, and the same account and library as on your laptop, so a summary made on your phone is there on your desktop later.

Related reading: the same problem on iPhone, and summarizing without an extension.