How to use the Compress Image to 20 KB
- Drop one or more photos onto the box — Target file size is already set to 20 KB.
- Pick an output format if you need one (JPEG works everywhere; WebP is smaller).
- Each image is saved at the best quality under 20 KB. Check the before/after view, then download one image or all as a ZIP.
Where 20 KB limits come up
Online application forms often ask for a signature or thumbnail under 20 KB — exam and job applications, bank and government portals, some visa forms.
How it fits the image under 20 KB
Instead of guessing a quality, the tool tries qualities and keeps the highest one that stays under 20 KB. If even low quality is too big, it reduces the width and height step by step — so text and faces stay as sharp as the limit allows. PNG images are reduced by lowering the number of colors first.
Tips
For a signature, crop tightly around it first with the image cropper and use JPEG; a 20 KB limit is easy to meet once the empty paper is gone.
Need a different size? Change Target file size on the page, or use the image resizer for exact pixel dimensions.
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Tools that pair well with the Compress Image to 20 KB
- Image Compressor — Shrink photos and graphics by 50–90% without visible quality loss.
- JPG to WebP Converter — Convert JPG photos to WebP to make pages load faster — usually a quarter to a third smaller with no visible difference.
- ID Card Scanner — Photograph or upload the front and back of an ID card, driver’s license, residence permit or bank card, drag the corners to straighten each side, and get both on one A4 or Letter page at real size — ready to print or save as a PDF.
- Compress PDF — Shrink PDFs for email, upload forms and websites.