What upscaling methods are available?

The tool uses Lanczos resampling, a high-quality interpolation algorithm that produces sharp, artifact-free results. Choose 2x or 4x enlargement.

What image formats are supported?

JPG, PNG, and WebP images are supported. The output format matches the input — upload a JPG, get a JPG back.

The upscaled result cannot exceed 100 megapixels. For a 4x upscale, this means input images up to about 2500x2500 pixels.

Use Image Upscaler online for free on PrivaTools. Privacy-first file processing — no sign-up, no uploads stored.