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Resize image to 20 KB

A 20 KB limit is common for small passport photos and signatures on exam, job and government forms. Add your picture and the tool lowers the quality step by step, and makes the picture smaller only if it has to, until the file is under 20 KB (20,000 bytes).

Drag and drop images here

or

You can also paste images with Ctrl+V.

JPG, PNG, WebP, GIF (first frame) and BMP. No sign-up and no daily limit.

Your images never leave your device.

Options

Resize by

Higher quality gives a sharper picture and a bigger file.

How to use it

  1. Add your image

    Drag it here or choose it from your phone or computer. JPG, PNG and WebP all work.

  2. Check the 20 KB limit

    The 20 KB limit is already selected. If your form asks for a different size, change it in the Preset list.

  3. Resize and download

    Press Resize images, check the result and download the JPG.

What a 20 KB image looks like

20 KB is very small, about the size of a short text file. A photo of 200 by 230 pixels can usually fit in 20 KB as a JPG, while a large phone photo of 4000 by 3000 pixels has to shrink a lot first. The tool does both steps for you: it lowers the JPG quality and, only when needed, reduces the number of pixels.

Signatures and simple scans compress very well because they are mostly white paper. Photos of faces with detailed hair or a patterned background need more data, so for those you may need a 50 KB limit instead.

Tips for a 20 KB photo

  • Crop closely around the face or the signature first. Less empty space means a smaller file at the same sharpness.
  • A plain white or light background compresses far better than a busy one.
  • If the form also needs exact pixels, enter them under Size and keep the file size limit on.
  • Always check the official instructions of your form. Photo and signature limits differ between exams and portals.

Frequently asked questions

How do I reduce a photo to 20 KB?

Add the photo, keep the 20 KB limit selected and press Resize images. The tool searches for the highest JPG quality that fits under 20 KB and makes the picture smaller only if that is not enough.

Is 20 KB the same as 20,000 bytes?

Here it is. Some systems count 1 KB as 1,024 bytes, so a file under 20,000 bytes is under the limit either way.

Can I use this for a signature?

Yes. Sign with a dark pen on white paper, photograph it in good light, crop close to the signature and resize it to 20 KB. There is also a separate page for resizing signatures.

Is my photo uploaded?

No. Everything happens in your browser, so the picture stays on your device.