Compress image to 10 KB

Get a signature or small photo under 10 KB in seconds, right in your browser.

Free, no sign-up
Files never uploaded
No watermark
No limits

Choose a photo or drop it here · JPG, PNG, WebP, HEIC

Target sizeKB Width (optional)px Height (optional)px

Your photo is processed in your browser and is never uploaded.

How to compress an image to 10 KB

Tap Choose a photo and pick an image from your phone or computer.
Check the target size. Change it if your form needs something different.
Tap Download JPG and upload the file to your form.

Where 10 KB limits are common

A 10 KB limit usually applies to signatures and small photos on recruitment and admission portals. It's one of the strictest limits you'll see, so a normal phone photo has to be reduced a lot.

What to expect from a 10 KB image

At 10 KB, an image is best at around 150 to 350 pixels wide. That's plenty for a signature or a small profile photo on a form. DocSlim reduces the dimensions automatically until the file fits while keeping the JPEG quality as high as possible.

Getting a clean 10 KB signature

Sign with a black or dark blue pen on plain white paper.
Take the photo in daylight and avoid shadows from your phone.
Crop tightly around the signature so there's little empty space.
If the form asks for a size like 140 × 60 pixels, enter it in the width and height boxes.

Frequently asked questions

Why does my 10 KB image look small?

To fit in 10 KB with good clarity, the image has to be a few hundred pixels wide. That's the size forms display it at, so it will look fine once uploaded.

Can I compress a PNG signature to 10 KB?

Yes. Choose the PNG and DocSlim converts it to a JPG under 10 KB. Transparent areas become white, which is what most forms expect.

Is my photo uploaded to a server?

No. The compression runs inside your browser on your own device. Your photo is never uploaded, stored or seen by anyone.

Is this tool free?

Yes. It's completely free, with no sign-up, no watermark and no limit on how many images you compress.

Why is the result a little under the limit instead of exactly the limit?

Forms reject files that are even one byte over. DocSlim counts 1 KB as 1,000 bytes and aims just below your limit, so the file passes whether the website counts 1 KB as 1,000 or 1,024 bytes.