Shelf

Shelf is your Mac's second memory — saves screenshots, links, PDFs and notes, understands their content, and brings them back when you describe what you remember.

Shelf is a Mac app that transforms how users retrieve saved content by acting as a second memory for their computer. Unlike traditional file systems that rely on filenames and folders, Shelf reads the content inside screenshots, PDFs, links, and notes using OCR and semantic understanding, then connects related items automatically. When users need something, they simply describe what they remember and Shelf finds it. Everything runs locally on the Mac — no account, no cloud, no folders required. Compatible with macOS 14 and above on both Apple Silicon and Intel machines, Shelf is free and designed for anyone who saves more than they can ever find again.