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MyImageToolbox

Resize Image

Client-side

Change image dimensions by percentage, exact pixels or longest side, for one photo or many.

Runs 100% in your browser · If you allow preferences, this browser saves the resize mode and sizes — never your images

Drag and drop your images here

or

JPG, PNG, WebP, GIF, BMP, AVIF, HEIC · up to 50 MB per file

Your images are processed in your browser and are not uploaded. You can also paste an image with Ctrl+V.

How do you want to resize?

Downscaling is done in several steps for sharp results. The original format is kept whenever the browser can write it.

What does Resize Image do?

Resize Image changes the width and height of your pictures. Use it to prepare photos for a website, a marketplace listing, a social network profile, a presentation or an online form that only accepts images up to a certain size. It works with one image or with dozens at once, and every image keeps its own proportions unless you decide otherwise.

Three ways to resize

  • By percentage scales every image by the same amount, for example 50% to halve both sides. Ideal when you simply want everything smaller.
  • Exact size sets a width and height in pixels. With Keep aspect ratio on, each image is fitted inside that box without being stretched; switch it off to force the exact dimensions, for instance for a 1200×630 social preview image.
  • Longest side limits the biggest dimension, so a portrait and a landscape photo end up equally “large”. 1920 px is a good value for screens, 1080 px for social networks and 800 px for e-mail.

The option Never enlarge small images stops images that are already smaller than the target from being blown up, which would only make them blurry and heavier.

Quality and formats

Large reductions are done in several halving steps with high-quality smoothing, which produces sharper results and avoids the jagged edges of a single big jump. JPG, PNG and WebP images keep their format. Formats that browsers cannot write, such as GIF, BMP or HEIC, are saved as PNG when they have transparency and as JPG otherwise. Each file name includes the new dimensions, so you can tell versions apart at a glance.

Private by design

The resizing happens in your browser. Your images are never uploaded, so the tool is safe for personal photos and confidential material, and it keeps working even on a slow connection.

How to resize images

  1. Drop your images or click Choose images.
  2. Pick a mode and enter the percentage or the size in pixels.
  3. Click Resize images and check the new dimensions shown next to each file.
  4. Download the images one by one or together as a ZIP.

Frequently asked questions

Does resizing reduce the file size?

Yes, usually a lot: half the width and height means a quarter of the pixels. For even lighter files, use Compress Image afterwards.

Can I enlarge a small image?

Yes, untick “Never enlarge”. The image becomes bigger but cannot gain detail it never had, so it will look softer.