Utilore

Enlarge a Picture

A logo needs to go on a poster, a photo has to fill a slide, a form demands at least 1000 pixels. All of that is enlarging — and all of it is honest work with the pixels that already exist. What the camera did not capture cannot come back, and this page does not pretend otherwise.

or drop them here

A picture: JPG, PNG, WebP, HEIC. Up to 40 MB

No new detail will appear. Enlarging recalculates the pixels that are already there — what the camera did not capture cannot be recovered, and anything that “restores” it is drawing something that was never in the frame.

The picture stays on this device: it is enlarged inside the tab and nothing is uploaded. Nothing is downloaded either — there is no model here, only arithmetic, so the page works with the network off.

What this is good for: printing a small logo bigger, filling a slide, feeding a form that demands a minimum size. What it will not do: make a blurred licence plate readable, or turn a screenshot into a photograph.

Nearby: Image Resizer · Compress Image · Crop Image · Photo Editor

How to use

  1. Choose a picture — JPG, PNG, WebP or HEIC.
  2. Pick how much bigger: two, three or four times. The result size and weight are shown before you press.
  3. Press “Enlarge”, look at the one-to-one comparison, and download the PNG.

Good to know

Why there is no neural network here

Networks that “restore” a blurred face do not recover it — they invent a plausible one. On a holiday snapshot that is a matter of taste; on a document, a product photo or a still from a camera it is a forgery, and the person using it usually does not know that. So this page does arithmetic instead: the pixels that exist are recalculated, and nothing is added. It costs nothing to download, works with the network off, and never invents a detail you will later have to defend.

Enlarged in steps, not in one jump

Going straight from 500 pixels to 2000 leaves a soft, smeared edge. Doubling twice reaches the same size with a visibly cleaner result — the same arithmetic, a better order. On top of that there is an optional edge contrast: an unsharp mask does not add detail, it gives back the contrast that resampling ate at the borders. Its strength is capped, because past a point it draws halos that look like sharpness and print like a defect.

The comparison is part of the answer

Under the result there is a piece of the picture at one to one: on the left the same fragment simply stretched, on the right the recalculated one. That difference is the entire honest benefit of the tool, and it is better shown than described. It also makes the limit visible: if the original is blurred, both squares are blurred, and no setting on this page will change that.

Frequently asked questions

Is the picture uploaded anywhere?

No, and nothing is downloaded either. There is no model here, only arithmetic — after the page has loaded it works with the network switched off.

Will a blurred photo become sharp?

No. Enlarging recalculates what is there; it cannot recover what the camera never captured. Tools that promise otherwise are drawing a plausible guess, which is a different thing from a photograph.

Why was my picture enlarged less than I asked?

Because above sixteen megapixels a browser canvas returns an empty file rather than an error. When the requested size crosses that line, the tool enlarges as far as it safely can and says by how much.

Why is the result a PNG and so heavy?

PNG keeps every pixel exactly, which is what you want after enlarging: a JPEG would add its own artefacts on top. The weight is shown before you press — if it is too much, use the image compressor afterwards.

What is this actually good for?

Printing a small logo bigger, filling a slide, passing a form that demands a minimum size. It will not make a blurred licence plate readable, and it will not turn a screenshot into a photograph.

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