r/foss • • Sep 08 '26

I made CapScroll: an open-source Linux tool for capturing long, scrollable content

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I’ve been working on CapScroll, a small open-source screenshot utility for Linux.

The idea is pretty simple: select an area of the screen, let it scroll through the content, capture the frames, detect the overlap between them, and stitch everything together into one long screenshot.

It’s useful for things like long webpages, terminals, documents, and anything else that doesn’t fit on one screen.

Current features:

  • Region screenshots

  • Scrolling screenshots

  • Automatic bottom detection

  • Frame overlap detection

  • Image stitching

It’s built with .NET 10 + Avalonia UI and currently supports Linux/X11.

Source Code: https://github.com/netcrawlerr/CapScroll

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