Compress an image to 100 KB
A popular limit for web forms, applications and email attachments.
- Private by defaultDeleted within an hour
- Super FastProcess in seconds
- No Sign-upStart instantly
How it works
Add your images
Drag and drop, paste, or pick files. They upload over an encrypted connection.
Pick a quality or a target size
Use the quality slider, or tell it exactly how many KB or MB you need.
Download
Save each file, or grab them all at once as a ZIP.
100 KB is comfortable enough that most photos get there with only a quality reduction, keeping them looking sharp. Pick the "100 KB" preset from the Target size menu, add your photo, and the tool searches for the highest quality that still fits under the limit.
If a photo is unusually large to start with, for example a 12-megapixel camera photo, reaching 100 KB may need a small amount of resizing too, which this tool does automatically when quality alone isn't enough. The result always tells you exactly what it reached.
Your photo is sent over an encrypted connection and deleted within one hour, and with no sign-up needed you can try a few quality or crop choices quickly. If you're not sure which output format to pick, JPEG is usually the safest default for ordinary photos at this size, reaching 100 KB with less visible compromise than PNG. Compare the compressed result side by side with the original at normal viewing size before deciding it needs further adjustment.
How the search for 100 KB works
The tool does not guess a quality and hope. It encodes your picture several times, at most seven, trying qualities between 20 and 92 and halving the range each time, and keeps the highest one whose file is at or under 100,000 bytes. Only when even the lowest quality is too big does it reduce the dimensions, in steps, and run the search again on the smaller picture.
So you always get the best-looking version that fits, and the result tells you what it took: the size reached and the final width and height.
What 100 KB is enough for
For a JPEG, 100 KB holds a clean photo of roughly one megapixel, about 1200 by 800. That is plenty for a blog post image, a marketplace listing, a profile picture or an email signature. It is too little for a full-screen hero image on a large monitor, where the same budget would have to be stretched over far more pixels. For that job, pick 200 or 500 KB instead.
Getting more quality out of the same 100 KB
Three choices change how good a 100 KB file looks. First, the format: WebP and AVIF pack more detail into the same bytes than JPEG, so use them when the destination accepts them. Second, the dimensions: if the picture will be shown 800 pixels wide, resize it to that before compressing, so no bytes are spent on pixels nobody will see. Third, the crop: removing an empty sky or a wide margin leaves more of the budget for the subject.
Frequently asked questions
Will 100 KB look noticeably worse than the original?
For most photos, no. 100 KB is large enough that the quality loss is usually hard to see at normal viewing sizes.
What file formats can I compress to 100 KB?
JPEG, PNG and WebP are all supported; JPEG usually reaches the target with the best visual quality.
Can I compress several photos to 100 KB at once?
Yes, the batch limit is 20 images on the free plan and 500 on Pro.
Does the download keep my original filename?
Free accounts get "name-min" as the filename; Pro accounts can set their own pattern.
Is 100 KB counted as 100,000 or 102,400 bytes?
As 100,000 bytes. That is the smaller of the two definitions, so the file passes a 100 KB check whichever way the other side counts.
My image is already under 100 KB. What happens?
It is still encoded at the best quality that fits. When that would not make the file any smaller, you get your own file back, marked as already optimised.