Why resizing matters more than you'd think
Resizing is the most under-used way to shrink an image. A modern phone or camera produces photos 4000–6000 pixels wide, but most places you'll actually use an image — a blog post, a profile picture, a marketplace listing, an email — display it at 800–2000 pixels. Sending the full-resolution file wastes most of those pixels and inflates the file size for no visible benefit.
Because file size scales with the number of pixels (width × height), the savings are dramatic: halving both dimensions removes three-quarters of the pixels. That's usually a far bigger reduction than the quality slider alone can achieve, and the two stack.
Picking a max width
- 1920px — a safe default for full-width web images that still look sharp on large screens.
- 1200px — typical for in-article images and blog content.
- 800px — fine for thumbnails, list images, and most email use.
- For high-DPI ("retina") screens, double your display size — e.g. set 2400px for an image shown at 1200px — to keep it crisp. See the resizing guide for the full reasoning.
You only set the width. The height is calculated automatically so the image keeps its proportions — nothing is stretched. Images already narrower than your max width are left untouched.
How to resize
- Enter a Max width in pixels.
- Pick an output format and quality (JPG at 85% is a good general choice).
- Drop your images above. Each is scaled down and re-encoded.
- Download individually or as a ZIP.
Combine resizing with WebP for the biggest reduction.
Related reading: resizing images for the web and image formats and page speed.