Image or PDF for a document upload?

Follow the form. If it accepts both, PDF is safer for multi-page proofs; a single ID card is fine as a JPG.

Can I hit exactly 100 KB rather than just under it?

The tool searches for the largest file that still fits your budget, so results typically land within a few kilobytes of the target rather than far below it.

Resize an image to 100 KB

100 KB is a common upload cap for ID documents, certificates and scanned proofs. Drop your photo in below — the target is already set to 100 KB, and everything runs inside this browser tab, so the image never leaves your device.

Target file size

Dimensions

Output format

How to get a photo under 100 KB without it turning to mush

Crop before you compress

Empty background costs bytes. Cropping tight on the subject leaves more of the size budget for the detail that matters.

Match the required dimensions

Most forms cap both KB and pixels. Set the dimension preset here as well so a 100 KB file is not rejected for being the wrong shape.

Use JPG for photos

PNG stores photos far less efficiently. Choosing JPG output often reaches the target with visibly better quality.

Who asks for 100 KB?

100 KB is the standard ceiling for ID documents, certificates and scanned proofs on visa portals, tender submissions and enterprise HR systems.

Settings that actually reach 100 KB

At 100 KB you can keep a full A4 scan at 1500 px on the long edge and still read 8-point print. Colour photographs at this budget are effectively indistinguishable from the original on a screen.

The mistake that gets uploads rejected

Merging several scans into one image to save uploads. Portals usually want a single-page PDF instead — use the merge and PDF tools rather than stacking images.

Questions about 100 KB uploads

Image or PDF for a document upload?: Follow the form. If it accepts both, PDF is safer for multi-page proofs; a single ID card is fine as a JPG.
Can I hit exactly 100 KB rather than just under it?: The tool searches for the largest file that still fits your budget, so results typically land within a few kilobytes of the target rather than far below it.