Compress an image to 100 KB

100 KB is the limit of many application forms for a scanned certificate or ID, and a sensible size for a photo sent by e-mail or put on a website: it opens instantly on a phone and still looks like a photo, not a thumbnail.

At 100 KB a typical phone photo comes out about 1,000 × 700 pixels at a quality of 72 or more, sharp on a laptop screen. The tool gets there by searching for the best quality at the largest size that fits, and then passes the JPEG through MozJPEG's lossless optimiser, which removes a few more percent without touching a pixel and spends that room on a little more quality.

Compress your image to 100 KB

Drop your image here or click to browseSupported: JPG, PNG, WebP, HEIC, AVIF, GIF, BMP, TIFF • Max 100MB

How to get an image under the limit

  1. Upload the image: JPG, PNG, WebP, HEIC from an iPhone, and more.
  2. 100 KB is already selected. Under More options you can add a minimum, exact dimensions, or choose WebP.
  3. Press Compress and download the result; the page shows its size, dimensions and quality.

What the file will be

  • Under 100 KB whichever way the site counts a kilobyte.
  • The largest picture at a clean quality, so it still looks like a photo.
  • A PNG screenshot or a scan is converted to JPG, which is many times smaller for the same look.
  • Transparent areas of a PNG are placed on white, since JPG has no transparency.

Questions about 100 KB images

For one A4 page of ordinary print, yes: in our test a full page of text came out about 850 pixels across, saved in greyscale, and stayed readable. Small print needs more: choose 200 KB if the form allows it, or scan only the part that matters.
Because a PNG keeps every pixel exactly and cannot be brought down to a size you choose; a JPG can. For a screenshot with text, choose 200 KB if the form allows it: text needs more detail than a photo.
Type the original width and height under More options. The picture is then never resized, only its quality is adjusted, and if that cannot reach 100 KB the page tells you the smallest size it can reach at those dimensions.
Each compression uses 3 credits. Without an account you have 50 free credits a month, and a free account has 300. A failed compression uses none.

Other sizes

Compress an image to 20 KBCompress an image to 50 KBCompress an image to 200 KB Any size you choose