Ledge - Free Mac menu-bar file shelf with a built-in WebP converter
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Hold files on a temporary shelf while you drag between apps, and convert images between formats without leaving your Mac. Shake a file while dragging and a shelf opens under your pointer. Includes batch conversion between HEIC, JPG, PNG, TIFF, GIF, AVIF, PSD, PDF and WebP (output as WebP, PNG, JPEG or GIF), Rename, custom actions and iCloud links. Free, open source, no uploads.

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Hi everyone, I’m NeeL, the maker of Ledge. I built it because the file shelf apps I tried were either trials or too limited, so I made a free, open-source one with no limits.
Shake a file while you drag it and a shelf opens under your pointer, so you can park files while you move between apps. It also converts images between WebP, PNG, JPEG and GIF in batches (HEIC, JPG and PNG to WebP, WebP back to PNG or JPEG), all on your Mac with no uploads. Plus Rename, custom actions and iCloud links. About 3 MB.
One heads-up: it isn’t notarized yet, so macOS will warn you the first time you open it. The README explains how to approve it.
I’d love to hear how shake-to-open works in the apps you use and what you’d like added.