Open your 3D models.
Choose the format you need. Sizes and the up direction are adjusted for you.
Press Convert, turn the model in the preview, and save.
3D printing formats (STL, 3MF) use millimetres; web and AR formats (GLB, USDZ) use metres. The size is converted so the model is the same real size. You can turn this off.
Colours and textures are kept between GLB, glTF, FBX and USDZ where possible. STL has no colours, and textures that are separate files can't be loaded.
No. Everything happens inside your browser, on your own device. The site's security settings stop the page from sending your files anywhere.
Yes. No sign-up, no daily limit and no watermark.
Yes, in Safari, Chrome and other modern browsers. You can open files from the Files app or your downloads, and save the results back.
Customer lists, contacts, bank exports and the routes you run from home stay on your phone or computer from start to finish.
How it stays private100 converters for the files people use every day.