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Upscale Images

Make a small image bigger without it turning to mush. Double or quadruple it, or go straight to Full HD or 4K.

Upscale an image to 4K or Full HD

Drop the image in, choose a size under Upscale to, and press Upscale. It comes back larger and with its edges sharpened.

2× and 4× multiply the dimensions, so a 960 × 540 image becomes 1920 × 1080 at 2×. Full HD and 4K work the other way round: they fit the longer side to 1920 or 3840 pixels whatever the starting size, and the shorter side follows the image's own proportions. Those two are the ones to use when a slot, a screen or a print has a size in mind and you do not want to do the arithmetic.

Images that are already at or beyond the target are left exactly as they are. Upscaling never makes anything smaller, so you can safely run a mixed folder through it.

Keep it sharp with the Sharpen slider

Enlarging always softens an image a little, because the new pixels have to be filled in from their neighbours. To counter that, a sharpening pass runs after the enlargement. The Sharpen slider sets how strong it is, and it starts at 50 percent, which suits most photos. Drag the handle across the preview afterwards to compare the result against the original.

If fine textures start to look etched or grainy, bring the slider down. For text, line art and screenshots you can usually push it higher than for photographs. At 0 you get the plain enlargement with no sharpening at all.

Is this a photo quality enhancer?

Only in one sense, so it is worth being precise. Enlarging spreads the detail an image already has across more pixels and sharpens the result; it does not create detail that was never captured. A clean 1000-pixel photo upscaled to 4K will look fine on a 4K screen. A blurry photo will become a bigger blurry photo. The tool does not rescue bad sources, and it does not pretend to.

This is deliberate scaling, not an AI model. AI upscalers can look impressive because they invent plausible texture, but invented texture is a real problem for faces, text and anything that has to be accurate. What you get here is a larger, sharper version of exactly the picture you gave it, produced in a second or two on your own machine.

Where it earns its place: a logo that only exists at 300 pixels and needs to go on a slide, product photos that are a touch too small for a template, an old screenshot for a presentation, or a wallpaper that needs to fill a 4K monitor. In all of those the source is sharp and the problem is only the pixel count.

Frequently asked questions

Is this an AI upscaler?

No. It uses bicubic scaling followed by a sharpening pass, running as code in your browser. That means no invented details, no waiting, and no uploads. If you need a blurry image reconstructed, an AI tool is the right choice; if you need a sharp image bigger, this is.

Does upscaling improve the quality?

It adds pixels, not information. On a sharp source the result looks clean at the larger size. On a soft or heavily compressed source it only makes the softness bigger.

What is the difference between resizing and upscaling?

Both change dimensions. Resize is for making images smaller or hitting exact numbers. Upscale is for making them larger, and adds the sharpening step that enlargement needs.

Are my photos uploaded anywhere?

No. Everything on this page runs inside your browser, so the files never leave your device. That is also why there is no file size limit and why the tool keeps working if your connection drops.