Image upscale / quality restoration
Upscale by 2× / 3× / 4× / 8×: double the size per pass with stepwise resampling, then bring edges back with USM sharpening and denoising. Drag the center divider to compare original vs upscaled.
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What this doesMathematical interpolation (stepwise 2× resampling) + USM sharpening + 3×3 median denoising quality restoration,
Not an AI super-resolution model: it won't invent details that don't exist.
YesScreenshots, UI mockups, illustrations, scans, pixel artClearly effective (lines come back clean and sharp);
YesPhotos with heavy blur, strong noise, or obvious compression blocksUpscaling gains are limited; higher multipliers tend to smear.
For detail that doesn't exist in the source, use an AI upscaler — this tool doesn't invent it.
Drag images here or click to choose
Multiple supported · one parameter set applies to all
Stepwise resampling opens new canvases during upscaling; images over 8192px on any side are skipped with a reason (browser canvas limit).
With denoising on, each pixel is a 3×3 median — large images get noticeably slower.