Media Viewer manual

Two chapters. Including what that “upload these files?” prompt actually means — the question people ask most.

Pick a folder and every image and video inside it is listed at once. Use the arrow keys to flick through them one by one.

The case it is built for: you have a folder full of images on disk and you want to skim it quickly — without opening a viewer app and clicking each file, and without waiting for some gallery program to build an index.

Open the tool

Supported formats

KindExtensions
ImagesWebP, PNG, GIF, JPG, JPEG, AVIF, BMP, SVG
VideoMP4

You can filter to just some of them — only GIFs, say, or everything except MP4.

What it does

⚠️ About that “upload these files?” prompt

After you pick a folder, your browser asks whether you want to “upload” the files.

This tool uploads nothing. That sentence is your browser's standard warning before it hands a whole folder to a web page — it describes what the page could do, not what it is doing. Every read (thumbnails, previews, sizes and dates) happens on your own machine.

It is the question people ask most, so it has its own chapter: Why your browser asks about uploading.

A few things to know upfront

Read-only. This tool cannot rename, delete or move anything — read access is all it is given.

Videos have no thumbnails. They show an extension badge in the list and play when opened. Generating a video thumbnail means decoding a frame, which is not something this tool does.

No backend, no account, nothing to install.