How is this different from resizing an image?

Resizing spreads the pixels you already have across a bigger area, so the picture ends up larger and softer in one move. This puts back edges and texture that the small version does not contain, by guessing what the photograph would have looked like at four times the size. Side by side on a real photo the difference is not subtle.

Is my picture uploaded?

No. The enlarging happens on this page, on your own machine, and no request carries the picture anywhere. The one thing that is fetched is the enlarger itself, about 5 MB, the first time you use the tool. Your browser keeps it after that.

Why is there a size limit?

Because your machine is doing the work rather than a rented graphics card. A million pixels is eighty one squares and a couple of minutes; twice that is twice the wait and a result some phones cannot hold. Saying no at the start beats a progress bar that dies at ninety percent.

Small faces, where it will confidently invent features nobody had. Text, which comes back crisp and occasionally wrong. And anything already sharp: it fills in what is missing, so a picture that is missing nothing comes back much the same, only larger.

Will it fix a blurry photo?

Sometimes, and not the way people hope. Softness from having too few pixels is exactly what this is for. Motion blur, a missed focus or heavy compression are damage in the pixels that are there, and enlarging them enlarges the damage too.

Does it work on logos and flat artwork?

It was built for photographs, so that is where it is strongest. Flat art comes back cleaner than a plain resize but can lose the exactness of a hard edge. If you still have the original as an SVG, scaling that will always beat enlarging a picture of it.

ON YOUR DEVICE · FREE

Upscale Image

Four times bigger, and it never leaves your machine

…

1
Choose a picture
Up to a million pixels, which is 1000 by 1000 or any other shape with as many. Small is the point here: this exists for the picture that is already too small, and it is read from disk rather than sent anywhere.
2
It is enlarged a square at a time
The picture is cut into small squares and each one is enlarged on its own, because the thing doing the enlarging works at one fixed size. Every square reads a strip of its neighbours before it starts and is faded into them where they meet, which is what keeps the joins from showing. Budget a second or two per square and watch the counter.
3
Download
Four times the width, four times the height, as a PNG. Transparency survives, and nothing of ours is stamped on it.

FAQ

How is this different from resizing an image?: Resizing spreads the pixels you already have across a bigger area, so the picture ends up larger and softer in one move. This puts back edges and texture that the small version does not contain, by guessing what the photograph would have looked like at four times the size. Side by side on a real photo the difference is not subtle.
Is my picture uploaded?: No. The enlarging happens on this page, on your own machine, and no request carries the picture anywhere. The one thing that is fetched is the enlarger itself, about 5 MB, the first time you use the tool. Your browser keeps it after that.
Why is there a size limit?: Because your machine is doing the work rather than a rented graphics card. A million pixels is eighty one squares and a couple of minutes; twice that is twice the wait and a result some phones cannot hold. Saying no at the start beats a progress bar that dies at ninety percent.
What is it bad at?: Small faces, where it will confidently invent features nobody had. Text, which comes back crisp and occasionally wrong. And anything already sharp: it fills in what is missing, so a picture that is missing nothing comes back much the same, only larger.
Will it fix a blurry photo?: Sometimes, and not the way people hope. Softness from having too few pixels is exactly what this is for. Motion blur, a missed focus or heavy compression are damage in the pixels that are there, and enlarging them enlarges the damage too.
Does it work on logos and flat artwork?: It was built for photographs, so that is where it is strongest. Flat art comes back cleaner than a plain resize but can lose the exactness of a hard edge. If you still have the original as an SVG, scaling that will always beat enlarging a picture of it.

Upscale Image

Choose a picture

It is enlarged a square at a time

Download

FAQ

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