Compress Image to 20KB

Need a photo under 20 KB? Compress image to 20KB here: drop your JPG, PNG or WebP and it is automatically made as sharp as possible while staying under the limit. Ideal for scanned signatures and small photos on exam, job and government application forms.

How to compress an image to 20KB

The tool searches for the highest quality that still fits under 20 KB. It first lowers the JPG quality step by step; only if the image is still too large at a low quality does it reduce the pixel dimensions, just enough to fit. So you get the sharpest image the limit allows, without trial and error.

Where a 20KB limit is common

Online application forms for exams, jobs, scholarships and government services often set strict limits: a signature under 10 to 20 KB and a photo under 20 to 50 KB. A phone photo is usually 2 to 5 MB, a hundred times too big, so it has to be compressed hard.

At 20 KB, the tool keeps the full picture but reduces its pixel size, typically to 300 to 500 pixels wide, which is exactly what these forms display. For a signature, photograph it on plain white paper in good light and crop tightly around it: a clean, high-contrast signature stays crisp even at 10 KB.

Tips for the best result

• Crop first. Cutting away empty background leaves more of the 20 KB for what matters. Use the image resizer & cropper, then compress here.
• Choose JPG for photos. It is accepted by every upload form and gives the smallest files for photos. PNG keeps transparency but needs more space.
• Check the exact limit. We count 1 KB as 1,000 bytes and stay under it, so the result is accepted whether a website counts 1,000 or 1,024 bytes per KB.
• Different limit? Type any size in the KB box; the image is recompressed instantly.

Private by design

Your images are processed by your own browser and never uploaded to a server, so they stay on your device. There is no watermark, no sign-up and no limit on how many images you convert.