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Compress an image to 300 KB

Three hundred kilobytes leaves plenty of room for a sharp photo.

  • 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 300 KB. We aim for 291 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 300 KB

Visa and permit portals, insurance claims, and blog images.

What to expect

Most phone photos come out around 1200 to 1500 pixels wide and look like the original at normal size.

How big a picture fits in 300 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)980 x 650
Typical photo or headshot1,210 x 810
Scan, signature or screenshot of text2,090 x 1,390

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 291 KB, which is 9 KB under 300 KB, so the file is not turned away over a few bytes.

Questions people ask

Can I compress several photos?

Yes, one after another. Each runs in your browser, so there is no upload wait between them.

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.