"100% Free and privacy friendly"
Biggest lie of 21st century. Maybe you are honest, but forgive me for not trusting you. It's just no a world we're living in.
Please use my tool to verify what I just wrote in the comment, I worked hard to bring AI models to work on the browser. It's free if you want to upscale 5 images at once. You can upscale as many images as you want. Free forever. If you want to upscale 1000's of images at once you should get the premium. if you don't want it then that's fine, you can upscale 5 images at once for free, after it's upscaled then upscale another set of 6 images for free, etc.