On your device

Preview every file in a folder

Your file explorer lists them; this shows you what is inside them. Windows draws a thumbnail for pictures and videos and gives everything else the same grey icon, so a folder of PDFs, spreadsheets, markdown and code is a wall of identical rectangles. Here each one previews itself, and you find what you want by looking rather than by opening forty files one at a time.

Coming soon

This tool isn’t available just yet — it’s on the way. Meanwhile, explore the other free tools.

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Questions

Is my folder uploaded?: No. The folder is read inside this browser tab and nothing is sent anywhere — open your Network tab while you use it and you will see zero uploads. It is also why this can exist at all: reading somebody’s whole folder is not a thing you would do with a site that takes copies.
Why does Windows only show thumbnails for photos?: Explorer ships thumbnail handlers for images and video and falls back to a generic icon for everything else. So a folder of forty PDFs, spreadsheets and markdown files is forty identical rectangles, and the only way to find one is to open them one at a time.
Can I delete files from here?: In Chrome and Edge, yes — and they move to a _trash folder inside the folder you picked rather than being destroyed, so getting one back is a drag in File Explorer. Other browsers do not offer the folder permission that requires, so the button is not shown there rather than failing when you press it.
What can’t it preview?: Photoshop, Illustrator, Word, Excel, PowerPoint and archives — each needs a parser or a rasteriser a browser does not have. Those files are still listed, with the reason, because hiding them would make your folder look emptier than it is.
How many files can it handle?: Free previews up to 30 files, which covers most real folders. Pro removes the cap. Either way it stops before it would try to render something like node_modules, and tells you it stopped.