Image Resizer

Resize images to exact pixel dimensions, for profile pictures, listings, banners, or anywhere with a size requirement. Batch-friendly, with aspect ratio protected by default.

Private by design: This tool runs entirely in your browser using its built-in image engine. Your files are not uploaded to a server, and nothing you convert is stored or logged. See how in-browser processing works.

How to use the image resizer

Drop your images onto the upload area: JPG, PNG, and WebP all work.
Enter a width, a height, or both. With “keep aspect ratio” on, images scale to fit your size without distortion.
Click Resize, then check the new dimensions shown on each file.
Download images individually, or everything as a ZIP.

Fit vs exact size

With keep aspect ratio on (the default), every image scales to fit inside the box you set: nothing distorts, and a batch of mixed photos each keeps its own proportions. Untick it and images stretch to exactly the width x height you enter: only do that when a destination demands exact dimensions and you accept the distortion.

Common target sizes

Square avatars and profile pictures: 400x400 or 512x512. Full-HD displays and presentations: 1920x1080. Web page hero images: around 1600px wide. Thumbnails: 300-400px wide. Entering only a width calculates each image's height automatically. The easiest way to make a set of images uniform.

Enlarging images, honestly

Upscaling works, but no resizer can invent detail that wasn't captured: enlarged images look progressively softer the further you push. Modest bumps (up to ~1.5x) usually pass; doubling a small image won't look like a photo taken at that size.

Resize first, then compress

For upload size caps, resizing is the heavy lifter: halving an image's dimensions cuts its pixel count by 75%. Follow up with the Image Compressor if the file needs to be smaller still.

Good to know

With aspect ratio locked, your images are scaled to fit within the box you set: nothing gets stretched.
Unchecking “keep aspect ratio” stretches images to exactly the width and height you enter.
Downscaling keeps images sharp. Upscaling beyond the original size works, but can't invent detail that isn't there.
The new dimensions are added to each filename, like photo-1200x800.jpg.
Resizing keeps the whole picture and changes its size. To keep only part of the frame, use the Image Cropper; to turn a sideways photo upright, use the Image Rotator.
Making a small image bigger here just stretches its pixels. If you need it larger and sharper, the Image Upscaler uses an on-device AI model to rebuild detail as it enlarges: then come back here for the exact final dimensions.

Frequently asked questions

Can I resize several images to the same size at once?

Yes, drop in a whole batch and every image is resized with the same settings. With aspect ratio on, each image fits your bounds using its own proportions.

What happens if I only enter a width?

The height is calculated automatically from each image's aspect ratio, handy for making a set of images all the same width.

Are my images uploaded to a server?

No. Resizing runs entirely in your browser: your images never leave your device.

How do I make all my images the same width?

Enter just a width and leave height blank, every image scales to that width with its height calculated from its own aspect ratio.

Does resizing reduce image quality?

Downscaling stays crisp, high-quality smoothing is applied. JPG and WebP results are re-encoded at 92% quality; PNGs stay lossless.

What about DPI for printing?

This tool works in pixels. Print size depends on the DPI your printing software applies, 300 DPI needs roughly 1200x1800 px for a 4x6" print, for example. Resize to the pixel count your print size requires.

How do I know which file is which after resizing?

The output dimensions are stamped into each filename, photo-1200x800.jpg, so versions never get mixed up.

Guides for this tool

How to Upscale an Image Without Losing Quality"Without losing quality" is the phrase everyone searches and no tool can literally promise. Enlarging an image means inventing pixels that weren't there. The question is whether the invented pixels look right, and modern super-resolution models are genuinely good at that, within limits worth knowing before you start.
How to Increase Image ResolutionA form rejects your photo for "low resolution". A printer says 300 DPI. A website wants 1200 pixels wide. These sound like the same problem and they are not. Sorting out which one you have is most of the work.

Image Resizer is one of 15 image tools, convert between formats, then compress, resize, crop, or rotate.