Compress Image to 20 KB – Free Online Tool

Twenty kilobytes is very little for a picture. A normal phone photo is often several thousand KB, so it has to shrink to a tiny fraction of its size.

GetTaskCraft first tries to keep the pixel size and lowers the JPG or WebP quality. If even the lowest quality is still too big, it makes the picture smaller in pixels, step by step, until it fits. This is why a very detailed picture can come out noticeably smaller in width and height than the original.

A PNG cannot be shrunk by quality because it is lossless. When you set a target size, the tool saves the result as WebP or JPG instead and tells you so. Choose JPG under Save as if your form only accepts JPG.

The result depends on how much detail the picture has. These are rough guides, not promises:

• A signature written with a dark pen on white paper usually stays readable at a fairly large width, because the empty white areas cost almost nothing.
• A face photo has to become small. Expect a short side of a few hundred pixels and some softness when you zoom in.
• A scan of a document with small text may become hard to read. If the text matters, 20 KB is probably too small, so check whether a larger file is allowed.
• A picture with a plain background compresses much better than one with a busy background, leaves or fine patterns.

• Crop tightly. Remove empty borders and the parts you do not need, so the pixels you keep are the ones that matter. The Crop Image tool on this site can do this.
• Resize to the pixel size the form asks for. If the notice gives a size in pixels, set it with the Resize Image tool first, then compress to 20 KB.
• Use good light and a plain background. Dark, grainy photos contain a lot of noise, and noise is expensive to store.
• For a signature, use a dark pen on white paper and photograph it straight on, with no shadow across the page.

This tool treats 1 KB as 1,024 bytes, as most computers do. Some websites count 1 KB as 1,000 bytes. A file of 20 KB here is about 20.5 KB by that count, and a strict website could reject it. If you are close to the limit, enter 19 KB to leave a margin.

Always follow the size, file format and pixel dimensions given in the official notice for your form. They differ between forms and can change, so this page cannot tell you what yours needs.