Fix a 3D model

A model you have, made right. Repair it so it prints or paint it new textures. Fewer triangles, same look: Reduce. A clean new mesh for editing or animation: Remesh. A smaller file, same model: Compress. The model stays open as you move between the five.

Questions

Repair, remesh or reduce?
Repair when a slicer or an engine rejects the file: holes, flipped faces, loose parts. Reduce when the model looks right but has too many triangles: same look, fewer of them. Remesh when you want a clean new mesh of even faces, for editing or animation. Compress when the file is too big to send or load: same model, fewer bytes. Retexture when the shape is right and the look is not.
Is my file uploaded?
Remesh sends it to our server and Retexture to a GPU online, and neither keeps it. Repair, Reduce and Compress run in your browser.