When do you need a photo under 100 KB?
100 KB is the most common limit for passport-style photos on job, university and visa application forms.
Forms usually reject a bigger file without explaining why, so it helps to aim slightly under the limit — this tool always stays at or below the size you set.
How the tool reaches the size
- It first tries lower JPG (or WebP) quality, searching for the highest quality that fits.
- It never goes below about 45% quality, because lower values produce visible blocks. If the photo still does not fit, it reduces the dimensions step by step instead.
- The result shows the final size and quality, so you can see exactly what you are uploading.
Tips for the best result
- Start from the original photo, not a screenshot or an already compressed copy.
- Crop away empty background first with the crop tool — fewer pixels means more quality for the face.
- If the form also asks for exact pixels (for example 600×600), resize first, then compress.
- Choose JPG for photos. PNG cannot be compressed to a target size this way.
How to use the Compress Image to 100 KB
- 1Drop your photo or paste it with Ctrl+V.
- 2The target is already set to 100 KB — change it if you need a different limit.
- 3Download the result; its final size is shown next to it.
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Frequently asked questions
Are my files uploaded anywhere?
No. Everything runs inside your browser on your own device. Nothing is sent to a server, so it works even offline once the page has loaded.
How does it reach the size limit?
It searches for the highest JPG quality that fits under the target. If the photo is still too big at the lowest sensible quality, it reduces the dimensions step by step until it fits.
Will the result be exactly 100 KB?
It will be just under 100 KB, never over. Forms ask for a maximum size, so slightly under is exactly what you need.