Resize images online by pixels
Set an exact width and height for a website, marketplace listing, profile, or document without installing software.
More local processing options
Up to 20 files; 25 MB each (HEIC 20 MB, SVG 1 MB). Maximum 8192 px per side and 32 megapixels. Files stay on this device.
AVIF reading and export depend on your browser. Unsupported formats report an error without uploading your file. SVG accepts only static shapes: no text, CSS, references, scripts, images, animation or external resources.
HEIC exports a single still image. Live Photo video, extra frames and original metadata are not retained.
Done before the upload bar would finish.
Choose an image.
Enter the target width or height.
Export the resized image in your preferred format.
What the browser does — and where it stops.
PixelNook re-encodes pixels with your browser’s canvas codecs. File size and visual quality can vary by browser, format, dimensions, and source image; a requested maximum size is a target, not a guarantee.
Browser API referenceReviewed 7 September 2026 · Method and source checked · Automated tests passed
Questions, answered.
Can I keep the original aspect ratio?+
Yes. Keep the ratio lock enabled and changing one dimension updates the other automatically.
Does resizing happen on a server?+
No. The image stays in your browser and is not sent to PixelNook.
Can I make an image larger?+
Yes, but enlarging a small source can make it look soft or pixelated.