Image Resizer

Resize images by pixels or percentage — free, in your browser.

Processed locally – files never leave your device

Drop images here or click to browse

JPG, PNG or WebP · up to 50 MB each · paste works too

Resize by

Width (px) Height (px) Aspect-ratio lock

Next: try Image Cropper — Crop freely or to fixed ratios.

Need a photo at exactly 1920 pixels wide, or half its current size? This free image resizer does both: type exact pixel dimensions, or shrink by percentage, with an optional aspect-ratio lock so nothing gets stretched. It works on JPG, PNG and WebP, one image or a batch.

Everything runs in your browser, so your images stay private. After resizing, you can trim the edges with the Image Cropper, or shrink the file size without changing dimensions using the Image Compressor.

How to use

Drop one or more images onto the box above, or click to browse.
Choose pixels or percentage, set the size, and keep the aspect-ratio lock on unless you want to stretch.
Pick a preset size, or type your own width and height.
Download each resized image, or all of them as a ZIP.

Why use Toolsvine

Resizing sounds trivial, yet many tools upload your photos, add a watermark, or limit you to one image at a time. Toolsvine resizes locally with the canvas, so there is no upload, no watermark and no limit — and batch mode resizes a whole set of images to the same dimensions in one pass. The dimensions shown are measured from the real output file, not guessed.

Pixels, percentage and aspect ratio

An image's size is its width × height in pixels — a 4000 × 3000 phone photo has 12 million pixels. Resizing to 1920 × 1440 keeps the same shape but with fewer pixels, so the file gets smaller too. Percentage mode is simpler: 50% halves each side, which quarters the total pixel count. The aspect ratio is the shape — width divided by height — and the lock keeps it fixed, so changing the width updates the height automatically and the photo never looks squashed.

Common sizes

Use	Size (px)
Full HD wallpaper	1920 × 1080
Instagram post	1080 × 1080
Blog / website photo	1200 × 800
Profile picture	512 × 512
Thumbnail	320 × 240

One warning: enlarging a small image does not add detail — a 400-pixel photo stretched to 2000 pixels just looks blurry. Resizing down is always safe; resizing up is best avoided unless you have no choice.

Frequently asked questions

Will resizing stretch my photo?

Not with the aspect-ratio lock on — it is on by default. Change the width and the height follows automatically, so the photo keeps its shape. Turn the lock off only if you deliberately want to stretch or squeeze the image.

Can I resize by percentage?

Yes. Switch to percentage mode and pick 25%, 50% or 75%, or type any value. 50% halves the width and height, which makes the file roughly four times smaller in pixel count.

Does resizing reduce the file size?

Yes, almost always. Fewer pixels mean less data to store, so a photo resized from 4000 px to 1200 px wide is typically several times smaller on disk as well.

Can I resize many images to the same size?

Yes. Drop in a batch and every image is resized to the dimensions you set. Download them all at once with the ZIP button.

Are my images uploaded anywhere?

No. Resizing runs entirely in your browser using the canvas. Your images never leave your device.