I use https://upscalepics.com to upscale, denoise & compress images. I found it to be the easiest way to get my work done. You get a perfectly upscaled image with 100% noise reduction and artifacts removal via their AI magic. They have trained their AI with tens of thousands of images. There is no need to install anything as it works directly on your browser.

Why did I find this better than others?

• I have tried multiple upscalers around the world, but this is the only upscaler that does not store your images, thereby ensuring that whatever you do on their website is 100% private to only you.
• Also, they are the only upscaler who compress images while they upscale.
• They support everything & anything upto 1296 Megapixels (provided you have good RAM). This output dimension is almost rare to reach and literally no other upscaler provides this output even for the best RAMs.
• It supports output conversion format. For eg: If you upload a PNG image, you can convert it to WEBP, or JPEG right while upscaling the image. It helps to save the image quality further had the conversion done by other websites without upscaling.
• You can upscale, compress and denoise unlimited images at once. It supports bulk processing.