Browser-local workspace

Resize images without uploading

Change image dimensions with browser-local processing and keep control of the original file.

No upload
No sign-up
JPG, PNG, and WebP

PixelShrink workspace

Local only

Drop images into the darkroom

Choose up to 20 JPG, PNG, and WebP images. Files are checked and decoded on this device.

Choose images

Nothing selected yet

Width (px) Height (px) Lock aspect ratio Resize by percentage Maximum-size preset Do not upscale Output format JPG background

Per image

25 MB

Images per batch

Batch limit

150 MB

A practical guide

Change the pixels that matter, without guessing the shape.

The image resizer changes width and height for JPG, PNG, and WebP files directly in your browser. You can enter exact dimensions, scale by percentage, or choose a maximum-size preset. Aspect-ratio lock prevents accidental stretching, while “do not upscale” stops a small source from being enlarged beyond its original dimensions.

Reducing dimensions often has a larger effect on file size than repeatedly lowering quality because the output contains fewer pixels. The final byte count still depends on the format and image content. If you convert to JPG, choose the background used behind transparent pixels; PNG and WebP can retain transparency.

How to use it

From file to finished in four moves

Add one or more supported images and let the browser read their original dimensions.
Enter a width and height, pick a percentage, or apply a maximum-size preset. Leave aspect ratio locked for natural proportions.
Keep “do not upscale” enabled unless you knowingly need a larger output, then choose the output format.
Resize locally, inspect the resulting dimensions and size, and download individual files or a ZIP.

Format notes

Know what changes—and what does not.

Dimensions and file size are different

A 1200 × 800 image always has 960,000 pixels, but its byte size varies with format, quality, and visual complexity.

Upscaling cannot invent detail

A larger pixel grid may satisfy a dimension requirement, but it cannot restore sharpness that was absent from the source.

Transparency follows the output format

PNG and WebP can preserve alpha. JPG cannot, so transparent areas are filled with the selected background color.

Good fits

Useful choices for real files.

Consistent shop thumbnails

Fit product images inside an 800 × 800 maximum while keeping each item’s natural proportions and avoiding enlargement.

A social preview image

Use the 1200 × 630 preset as a practical starting canvas, then confirm the crop and composition in the platform that will display it.

Privacy by design

Your image does not become our file.

The browser reads dimensions and creates resized pixels locally. The selected files and generated results are not uploaded to PixelShrink’s application server. Only the normal page request reaches the host, and closing or resetting the page releases the temporary browser object URLs.

Frequently asked questions

Answers before you start.

What does aspect-ratio lock do?

It keeps width and height proportional to the first ready image, preventing the squeezed or stretched look caused by changing one side independently.

Why did my requested size come out smaller?

When “do not upscale” is enabled, PixelShrink caps the result at the source dimensions. A maximum-size preset also fits within its box rather than forcing both sides exactly.

Will resizing crop my image?

No. This phase scales the complete image to the calculated dimensions; it does not crop or change the composition.

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