Compress Image to 20 KB

A 20 KB limit is one of the most common – and most frustrating – rules on online application forms, especially for signatures and small photos. A modern phone photo is often 3–5 MB, 200 times too big. This page is preset to 20 KB, so you only need to upload the image and download a file that fits, at the best quality possible.

Common uses

• Upload signatures to recruitment, exam and scholarship portals.
• Submit small passport-style photos on government and university sites.
• Attach thumbnails where systems allow only tiny files.
• Prepare avatars for legacy forums and intranet profiles.

Tips for best results

• Scan or photograph signatures on plain white paper with good light.
• Crop the signature tightly – white space still costs bytes.
• Set a maximum width of 300–400 px for signatures.
• Convert to grayscale first for even sharper signatures at 20 KB.

Hitting 20 KB with a phone photo

The compressor first tries to reach 20 KB at full resolution by lowering JPEG quality. A large photo cannot reach 20 KB this way while staying readable, so it then reduces the dimensions step by step – typically down to 400–800 pixels on the long side – until the file fits. The result panel shows the final size, quality and dimensions so you can check them against the form's rules.

When the portal also needs pixel sizes

Some forms specify both file size and dimensions, such as 140×60 pixels for a signature. Enter the larger dimension as the maximum width or height, and the image will be resized before compression.