Example: an 11-megapixel camera photo at 100 KB
A 3719 × 3056 harbour photo from a Sony DSLR (public domain, Wikimedia Commons), with File size set to 100 KB.
Three photos at 100 KB
| Photo | Before | After | Pixels | Score |
|---|---|---|---|---|
| Harbour (DSLR, 3719 × 3056) | 4.97 MB | 99.3 KB | 2434 × 2000 | 64 |
| City at night (iPhone, 3024 × 4032) | 7.37 MB | 98.8 KB | 1170 × 1560 | 61 |
| Rocky coast (4008 × 2015) | 1.71 MB | 99.1 KB | 1827 × 919 | 63 |
Public-domain photos from Wikimedia Commons. The score compares each result with the original at the same size: 80 looks the same at normal viewing, 60 shows small flaws up close.
When you need 100 KB
100 KB is a common limit on job portals, online applications and email signatures, and a good size for product thumbnails. At 100 KB the three photos above kept 1560 to 2434 pixels on the long side. If a form also asks for exact dimensions, resize to those first.
How to compress an image to 100 KB
- Drop your photos above, or choose them, up to 30 at a time. File size is already set to 100 KB.
- Check each result's file size. If an image can't get under 100 KB, PicoDiet shows the smallest result it found and tells you. Open any image to compare it with the original, zoomed in.
- Download one, or all of them as a ZIP. To try another limit, pick it above the results.
PicoDiet lowers the quality first and reduces the dimensions only when a full-size image would look blotchy. Photos come out as JPEG, which most upload forms accept; images with transparency stay PNG and GIFs stay GIF. How PicoDiet picks the size
What happens to your images
Uploaded over HTTPS to the nearest of our servers, processed automatically, and deleted within 3 minutes after you finish. Never shared, sold or used for training. No account needed. Privacy policy
Questions about 100 KB
Will the file be exactly 100 KB?
A little under, usually within 3% of 100,000 bytes. That also passes forms that count a kilobyte as 1024 bytes. If the image already looks the same as the original in less, you get the smaller file.
Why did my photo get fewer pixels?
At 100 KB a full-size photo would look blotchy, so PicoDiet makes it smaller and keeps the largest size that still looks clean. The harbour photo became 2434 × 2000 at score 64.
Can I choose another size?
Yes. Pick another size above the results, or type your own under Custom, in KB or MB (such as 1.5 MB). You can also give one image a size of its own.
Does it work for PNG, HEIC and screenshots?
Yes. Photos become JPEG, including iPhone HEIC photos. Screenshots and graphics keep their format; a PNG gets fewer colours before it gets fewer pixels.
Are my images private?
Yes. Images are uploaded over an encrypted connection to the nearest of our servers, optimized, and deleted within 3 minutes after you finish. They are never shared, sold or used for training, and there is no account to sign up for. Details are in the privacy policy.