Will my image be exactly 100 KB?

It will be just under 100 KB, as close as we can get without going over. We count 100 KB as 100,000 bytes, so the file passes whether a form counts a kilobyte as 1,000 or 1,024 bytes.

Why did my photo get smaller in pixels?

Lowering JPG quality alone can't always reach 100 KB. When it can't, the image is scaled down step by step, just enough to fit. The result shows its new dimensions.

My PNG has a transparent background. What happens to it?

The result is a JPG, which can't store transparency, so transparent areas become white. That is usually what forms want for photos and signatures.

Is my photo uploaded?

No. Compression happens in your browser, so photos, signatures and ID scans never leave your device.

Compress Image to 100 KB

Shrink a JPG, PNG or WebP photo to under 100 KB, in your browser.

Choose images

or drag and drop them here

JPG, PNG or WebP · up to 50 images

Processed entirely in your browser, nothing is uploaded, stored or seen by us.

Something not working, or a feature missing?Report a problem or suggest a tool

How to Use

1Drop in one or more photos, or click to select them.
2The target is already set to 100 KB. Change it if your form asks for a different size.
3Click Compress, then download each image or all of them as a ZIP.

Features

Gets every image under 100 KB automatically
Highest quality that fits, scaled down only when it must be
Works with JPG, PNG and WebP, saved as JPG
Up to 50 images at once, download individually or as a ZIP
No upload, 100% in-browser

Compress Image to 100 KB reduces any photo to under 100 KB automatically. It picks the highest JPG quality that fits and only scales the picture down when quality alone isn't enough, so you get the best-looking file that meets the limit, without uploading anything.

When you need an image under 100 KB

Scanned documents such as certificates, ID cards and mark sheets on application forms
Product and listing photos for marketplaces with upload caps
Images for emails, where small attachments open faster on mobile data

Every form sets its own limits. Check its instructions for the exact file size, format and pixel dimensions before you upload.

What fits in 100 KB

100 KB is enough for a clear photo around 1000 pixels across, or a readable scan of a single document page. Text in scans stays legible as long as the page isn't scaled down too far, so crop away blank borders first with the Image Cropper.

How it gets your image under the limit

If the image is already under 100 KB, you get it back untouched.
Otherwise it's saved as a JPG at the highest quality that stays under 100 KB.
If even the lowest quality is too big, the picture is scaled down a little at a time until it fits.

Need a different size? Change the number in the box, or use the full Image Compressor to compress by quality instead.