This page opens with Target size set to 100 KB and the output format set to JPG. Drop one image or a whole folder of them, and every file comes out below 100,000 bytes.
How the tool gets under 100 KB
The compressor encodes your image at JPG quality 92 first. If that is already under 100 KB, you get it as it is: no point in losing detail you have room for. If it’s too big, the tool tries quality 40, and when that fits it searches the range in between, halving the gap each time, until it has the highest quality that still fits. That takes six or seven attempts and usually well under a second per photo.
If even quality 40 is over 100 KB, the picture has more detail than 100 KB can hold at its current size. Instead of dropping the quality further, which makes blocky, smeared pictures, the tool reduces the width and height a step at a time and searches again. How far depends on the picture: a portrait against a plain wall keeps more pixels than a landscape full of leaves and gravel, because smooth areas cost far fewer bytes than fine texture.
Reading the result
Each row shows the old and the new size, the percentage saved, the final dimensions and the quality that was used. “Resized from 4032×3024” means the tool had to reduce the pixels to fit. Drag the divider in the compare view to check faces and text, and use Zoom to 100% to see the real pixels.
Where a 100 KB limit comes up
Limits around 100 KB are common on job portals, school and university applications, government and exam forms, profile pictures and older email systems that cap attachments. When a form also names pixel dimensions, enter them under Maximum size › Custom width × height first, so the tool compresses the picture at the size the form expects. Some forms also set a minimum, such as “between 20 KB and 100 KB”. A small image can come out below it even at the tool’s top quality of 92; if that happens, switch to the Quality tab and move the slider toward 100, which makes the same picture larger.
Tips
- Crop away empty background before you compress: fewer pixels leave more of the 100 KB for the face or document.
- A scanned page with text stays sharper as PNG than as a heavily compressed JPG, but only if the form accepts PNG.
- Photos lose their location and camera data here by default, which is what you want for most uploads.
The settings on this page
| Mode | Target size: under 100 KB (100,000 bytes) |
|---|---|
| Format | JPG |
| Maximum size | Original dimensions |
| Metadata | Removed (EXIF, GPS location) |
Every setting can be changed in the tool above; the page only chooses where it starts.