Compress image to 20KB
Photos, signatures and scans under 20KB, with the best quality that fits.
100% Browser-Based — Files Never Leave Your Device
About Compress Image to 20KB
Application portals often reject photos above 20KB. Pick your image and the tool automatically searches JPEG quality from 10% to 90%, and reduces the pixel size only when quality alone isn’t enough, until the file is strictly below 20KB. Need exact pixel dimensions for a form? Tick “Keep original dimensions” so only the quality changes. Select several images to compress them all at once.
How to compress Image to 20KB
- Select one or more images (JPG, PNG or WebP).
- Optionally tick “Keep original dimensions” if your form requires a fixed pixel size.
- Click “Compress to 20KB” and download your image (or a ZIP for several).
Frequently asked questions
Is it safe to compress my photos here? Are my files uploaded?
Nothing is uploaded. PDFToolsFast runs entirely in your browser using JavaScript and Web Workers, so your files stay on your device. You can even disconnect from the internet after the page loads and the tool keeps working.
Will the file be exactly 20KB?
It will be just under it: we aim strictly below 20,000 bytes, so it passes portals that count 1 KB as 1000 or as 1024 bytes, at the highest quality that fits.
Will my photo’s width and height change?
Only if quality alone can’t reach the target. If the portal requires exact dimensions (for example 200×230 px), resize first, then tick “Keep original dimensions” here.
Does it work for signatures and PNG files?
Yes. PNG, WebP and other formats are converted to JPG (transparent areas become white), which is what most portals expect.
What happens if my image is already smaller?
It’s returned untouched, with no quality lost, so you can upload it as it is.