Aggressive but controlled reduction
Reaching 20KB typically needs low quality (30-50%) and small dimensions (600-800px wide). This is ideal for ID photos, signatures and thumbnails.
Target file size
Compress Image to 20KB
Some application forms and legacy systems require images under 20KBLessMB helps you shrink photos and scans to that size locally in your browser
compress image to 20kbreduce image to 20kbimage compressor 20kbcompress photo to 20kbreduce image size to 20kb
Select an image, lower quality and dimensions, and check the output size below.
Drop your file here, or
Compress JPG, PNG, GIF, WebP, AVIF, JXL, and SVG images in your browser.
Files stay on your device
JPG · PNG · WebP · GIF · AVIF · SVG
No upload required100% free foreverWorks in your browser
Steps
Quick workflow
Use this simple browser workflow to get a smaller file while keeping the original on your device
- Select your image file.
- Choose WebP output format.
- Lower quality to 30-50%.
- Reduce width to 600-800 pixels.
- Download and verify the file is under 20KB.
What to know before you start
Prefer WebP output
WebP keeps more visual detail than JPEG at very low file sizes, so it is the best choice when the target is as small as 20KB.
Iterate to the target
LessMB shows the output size before download, so you can fine-tune quality and dimensions until the image fits within 20KB.
FAQ
Compress Image to 20KB FAQ
Short answers for the most common questions about this workflow and LessMB's local browser compression
No uploadFree toolBrowser-based
Can I compress an image to exactly 20KB?
Exact size depends on content and dimensions. Use the live output size preview to adjust settings until you reach the target.
Is 20KB enough for an ID photo?
Yes. Most ID and signature uploads only need a small, clear image. A 600px wide photo at moderate quality fits well within 20KB.
Are files uploaded?
No. LessMB processes images locally in your browser session.