Drag & drop an image here
or
PNG, JPG or WEBP — processed locally on your device, up to 400% larger
How the Image Upscaler works
Guide last reviewed: 28 September 2026
Upscaling increases an image's pixel dimensions and makes the result look as plausible as possible — it can't invent detail that was never captured, but a well-built upscaler gets much closer than a basic resize. This tool combines three techniques: a high-quality resize (better than the default scaling a browser or image viewer applies automatically), edge-aware noise reduction that smooths grain and compression artifacts while leaving real edges alone, and unsharp-mask style sharpening that restores the edge contrast that resizing and denoising soften. All of it runs as plain JavaScript and Canvas operations — no AI model download, no server round-trip, so it starts working the instant the page loads.
How to upscale a photo
- Bring in the photo you want to enlarge — drag it onto the page or click to browse (PNG, JPG, or WEBP).
- Pick an output size from 100% up to 400% of the original.
- Toggle Reduce noise and Sharpen detail on or off, or start from the Gentle Enhance / Heavy Enhance presets and adjust from there — the preview updates live as you change settings.
- Download the result as a PNG once you're happy with it.
Getting the best result
- Noise reduction and sharpening pull in opposite directions — too much noise reduction can make skin or fabric look waxy, and too much sharpening can introduce visible haloing around edges, especially on already-grainy scans. Balance the two rather than maxing out either.
- For a heavily degraded scan, lean on noise reduction first (try Gentle Enhance) — there's more to clean up, so a lighter sharpening pass looks more natural on top of it.
- For a clean but simply low-resolution digital photo, Heavy Enhance tends to look better, since there's less noise to worry about amplifying.
- Compare settings before committing. Toggling noise reduction and sharpening on and off costs nothing — the live preview means you can try a few combinations on your specific photo rather than assuming one setting is always right.
Common uses
People use this to prepare old or low-resolution family photos for printing, clean up screenshots and scanned documents, resize product photos up to a marketplace's minimum resolution requirement, and generally sharpen photos that look soft after being resized down and back up by another app. Because it needs no AI model download, it also works well as a quick one-off tool on a slow connection or a device with limited storage.
Frequently asked questions
How large can I upscale an image?
Up to 400% (4x) in each dimension. Very large source photos are automatically capped during export to keep your browser tab responsive — the tool tells you if this happened and by how much.
Will this restore detail that was never in the original photo?
No — no upscaler, AI-based or otherwise, can reconstruct detail the camera never captured. What this tool does is make the enlarged image look as clean and natural as possible rather than soft and blurry, which is what a basic resize alone produces.
Does it work on photos with transparency?
Yes. Sharpening and noise reduction only ever touch the RGB color channels, never the alpha (transparency) channel, so a transparent PNG's edges stay exactly as clean as they started.
Why does it not need to download an AI model, unlike the Background Remover?
Upscaling, denoising, and sharpening are classic, well-understood image-processing operations that don't require a trained neural network to do well — they're implemented directly as math over pixel values, which is why this tool starts working instantly with no download.