Compress image to 10KB

1. 1Choose one or more images, or drop them on the box. JPG, PNG, WebP, AVIF and iPhone HEIC all work.
2. 2If the form gives a pixel size (photos are often about 200 × 230, signatures about 140 × 60), type it in Width and Height. Otherwise leave them empty.
3. 3Download each JPG, or Download all for one ZIP. Every file’s new size is shown, so you can see it is under 10KB before you upload.

Highest JPG quality (out of 100) that kept each photo at or under the limit. Measured 17 October 2026 with Pillow 11.3 (libjpeg-turbo) on 1024 × 1024 product photos and a 1792 × 2304 one ("Biker jacket"); browsers use their own encoders, so expect close, not identical, results. Around 80 and above looks like the original.

Rule of thumb: 10KB holds a clear photo of about 200 pixels on the long side, which is the size passport-style form photos use anyway. A signature on white paper fits easily; clean it first with the signature resizer.

The tool saves a JPG at quality 92 first. If that is over 10KB, it searches down to quality 40 for the highest setting that fits. Only if quality 40 is still too big does it shrink the picture, choosing a size where quality stays around 75, because fewer pixels at good quality look better than more pixels at poor quality. 1 KB is counted as 1,000 bytes, so the file also passes forms that count 1,024.