Upscale a WebP
A small WebP made twice as large in each direction, with detail drawn in by a trained model.
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How it works
Add your images
Drag and drop, paste, or pick files. They upload over an encrypted connection.
Pick a quality or a target size
Use the quality slider, or tell it exactly how many KB or MB you need.
Download
Save each file, or grab them all at once as a ZIP.
Pictures saved from websites are sized for the page they were on, and that is often smaller than you need. A product image 600 pixels wide looks fine in a shop grid and thin on a slide or a printed sheet. This page doubles a WebP in width and in height with a super-resolution model, which predicts edges and texture where plain enlargement only spreads the existing pixels apart.
The result comes back as a WebP with four times the pixels. If the image has a transparent background, as cut-out product pictures and stickers do, the transparency is carried through and enlarged with it.
Images of up to one megapixel can be upscaled free of charge and without an account; the Pro plan allows 2.25 megapixels. The model runs on our own servers and no other company sees the picture. Uploads are encrypted and removed within one hour.
Web images are small on purpose
A site that serves WebP has usually done its homework. Its images are resized to the width of their slot and compressed as far as they will go, because that is what makes pages fast. The file you save is therefore the lean version, and both of its economies work against an upscaler: there are few pixels to start from, and the lossy compression has already softened fine detail and left faint blocks in smooth areas.
The model handles the first well and the second less well. It rebuilds sharp outlines convincingly, and it enlarges compression marks along with everything else. If the site offers a larger version of the picture, on a zoom view or a product detail page, save that one and upscale it, or use it as it is.
What doubling achieves
From 600 to 1200 pixels, a picture goes from thumbnail to something that fills half a laptop screen cleanly, enough for a presentation or a catalogue page on screen. From 1000 to 2000 it becomes printable at about 17 centimetres wide. Each pass doubles once. A second pass is possible as long as the picture going in is still within the size limit, which on the free plan means the first source can be no larger than 500 by 500.
Do not expect a small web image to become poster material. Two passes take 400 pixels to 1600, and every guess the model made in the first pass is magnified in the second.
Stills only, and a note on file size
An animated WebP is treated as a still: the first frame is upscaled and the others are left out. Moving images are not what this model is for.
The upscaled WebP has four times the pixels and is typically two to three times the size of the file you started with. That is still far lighter than the same picture as PNG. If the result is headed for a program that does not open WebP, change the output format in the editor to JPG, or to PNG when the transparency has to survive.
Frequently asked questions
Does the upscaled image stay a WebP?
Yes, unless you choose another format in the editor. JPG and PNG are both available.
Is a transparent background kept?
Yes. Transparent WebP images come back transparent at the new size.
Will it sharpen a blurry WebP?
It adds resolution, and edges come out crisper. It cannot restore detail that focus or heavy compression removed.
How large can the WebP be?
One megapixel before upscaling on the free plan, about 1150 by 860, and 2.25 megapixels on Pro.
What happens to an animated WebP?
Only its first frame is upscaled. The result is a single still image.
Is this the same as setting a larger size in Resize?
No. Resize with enlarging stretches the pixels and gives a soft result. The upscaler uses a model to draw plausible detail, which looks noticeably sharper.
Related tools
- Upscale an image 2xDouble the width and height with a model that reconstructs detail instead of blurring it.
- Upscale a JPGMake a small JPEG photo twice as large in each direction, with sharper detail than stretching gives.
- Resize a WebPNew pixel dimensions for a WebP, with its transparency and its animation intact.