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Compress an image to 100 KB

One hundred kilobytes is a common ceiling for profile photos, application forms and document scans.

  • Nothing is uploaded. Your browser does the compression, so the file stays on your device.
  • Lands under the real limit. We aim a little below it, so the upload goes through first time.
  • Fast. A 30 second 1080p clip fits into 10 MB in about two seconds on a desktop.
Where are you sending it?

Custom size 100 KB. We aim for 97 KB, a small safety margin so the file never lands just over.

Sent to our servers: 0 bytes. It all happens in this tab.

When you need 100 KB

Job and exam portals, profile pictures, CMS thumbnails, and email signatures.

What to expect

A photo lands around 700 to 900 pixels wide with good quality. Our search tries the highest quality that fits, then shrinks the picture only if it has to.

How big a picture fits in 100 KB

Rough pixel sizes at good quality. The tool checks the real result, so treat these as a guide.

What it isAbout this many pixels
Detailed photo (landscape, crowd)570 x 380
Typical photo or headshot700 x 470
Scan, signature or screenshot of text1,210 x 810

How we hit the number

We try the highest quality that fits. If the picture still will not fit even at a lower quality, we reduce the pixel size a step at a time until it does. Photos are saved as JPEG by default, which every form accepts. You can switch to WebP or PNG with the format menu.

The target we aim for is 97 KB, which is 3 KB under 100 KB, so the file is not turned away over a few bytes.

Questions people ask

JPEG or WebP?

JPEG works everywhere, so it is the default. WebP is smaller at the same quality if the site accepts it.

Why not just lower the quality?

Below a certain quality, artifacts show. Reducing the pixel size as well keeps the picture clean.

Related

Limits change. We link the official page wherever there is one, and the safety margin means a small change is unlikely to matter. Last updated 2026-11-09.