Compress Image to 20 KB

Where 20 KB comes up

SSC, railway, bank and state exam forms usually want a signature of 10–20 KB and a photo of 20–50 KB, often as JPG only. Some bank exam forms also ask for a left-thumb impression and a handwritten declaration, each with its own size limit, so read the notification for every item.

How to get a photo or signature under 20 KB

1. Drop the image on the box. The “Any photo under 20 KB” preset is already chosen.
2. For a signature, switch the Form preset to Signature, which also sets a 280 × 100 px size.
3. Use the crop button on the file row to trim the empty paper around it.
4. Download the result and check its size in the file row before uploading.

How it works

The tool lowers JPEG quality first and only shrinks the image if quality alone isn't enough, so text in a signature stays crisp.

For signatures

Sign in black ink on white paper, photograph it in daylight, then crop tightly with the crop button before compressing — the “Signature” preset also sets a 280 × 100 px size.

When the form gives pixels as well as KB

Some notifications specify dimensions too, such as a width and height in pixels or a size in centimetres. Type the pixel values into Max width and Max height and the image is resized before it is compressed. Watch for minimums as well: a small, clean signature can come out below the lower limit some portals set, such as 10 KB. If that happens, raise the quality slider or allow a slightly larger pixel size and save again.

If the portal still says no

Check the format first. Many forms accept only .jpg or .jpeg, so pick JPG under Output format if you started with a PNG screenshot or an iPhone photo. For a full application photo with more room, Compress image to 50 KB keeps more detail, and the Passport size photo page crops to 3.5 × 4.5 cm for you.