I got tired of opening Preview Export choose format choose folder just to turn a HEIC into a JPG. So I built a tiny radial menu that appears right under your cursor when you give a dragged file a little shake.
What you can do:
Convert images, PDFs, Office docs, video and audio
SATF is a free, open-source radial menu for macOS and Windows. Shake the file you're dragging, drop it on a format, done: images, PDF, Word, Excel, PowerPoint, video, audio and archives.