Compress Image to 100 KB

How to compress an image to 100 KB

100 KB holds a sharp photo at around 1,000 to 1,200 pixels wide, which is enough for any on-screen use. Phone photos are typically 2 to 5 MB, so the biggest saving comes from resizing to a sensible width; the quality search then finds the best setting that fits. The tool starts at up to 1,400 pixels on the long edge and adjusts both until the file lands under 100 KB.

1. Choose or drop one or more images above (on a phone, tap the box to pick from your gallery).
2. Leave the target at 100 KB, or type your form's exact limit into Custom target.
3. Each image is compressed on your device; the result shows its exact size and a green tick when it fits.
4. Download one file, or all of them as a ZIP.

Where the 100 KB limit comes up

Web forms, listings and document portals. Typical places:

• Online application and registration portals
• Marketplace and classified listings with upload caps
• Website images where each photo should stay light
• Support tickets and helpdesk forms

What fits in 100 KB

Most photos fit at 1,000–1,200 px wide at a quality of 70–85. Screenshots with lots of flat colour fit at larger sizes.

Watch out: Screenshots of text can look worse as JPG than as PNG at the same size. If the text gets fuzzy, crop the screenshot tighter before compressing.

How the tool decides

It first tries a high quality at the largest size allowed. If that is too big, it searches for the highest JPG (or WebP) quality that still fits. Only when quality would have to drop below about 50 does it reduce the pixel dimensions instead, because a slightly smaller sharp photo looks better than a full-size blocky one. The target is treated as 100,000 bytes so it passes checks that count a kilobyte as either 1,000 or 1,024 bytes.

Need an exact pixel size too? Resize first with the image resizer or crop with the image cropper, then compress here. For the background on why photos are so large, read the image compression guide or how to reduce image size for email.