Strict upload limit
Compress image to 20KB online
Create a very small image for strict portals, lightweight avatars, and low-size document requirements. For best results, use a simple photo and JPG or WebP output.
Original
How to make an image smaller than 20KB
A 20KB image is extremely small, so the tool may need to reduce both quality and dimensions. Use a tightly cropped image, remove unnecessary background, and choose JPG or WebP. If your file contains text, check the preview before downloading because very small targets can soften fine details.
Why is 20KB hard to reach?
Modern phone photos contain millions of pixels. Reaching 20KB often requires reducing dimensions as well as quality.
What images work best?
Simple portraits, icons, and small document photos work better than complex screenshots or detailed landscapes.
20KB guide
When should you use a 20KB image?
Choose 20KB when a website has a very strict upload rule, such as a small signature image, low-resolution avatar, admit-card photo, or lightweight document thumbnail. For portrait photos, crop tightly around the face before compressing. For signatures and scans, remove empty margins first so the useful area stays readable after compression.
Recommended 20KB settings
- Output format: JPG or WebP
- Max width: 600–900px
- Best for: signatures, avatars, tiny ID photos
- Avoid: detailed screenshots and text-heavy pages
Expected output size by resolution and quality
Approximate file sizes for common resolutions. Actual results vary with image content.
| Resolution | Quality 80 | Quality 70 | Quality 60 | Quality 50 |
|---|---|---|---|---|
| 4000×3000 (12MP phone) | 800-2000 KB | 500-1200 KB | 300-700 KB | 180-400 KB |
| 2000×1500 (5MP) | 250-600 KB | 150-350 KB | 90-200 KB | 55-120 KB |
| 1280×960 (1.2MP) | 100-250 KB | 60-150 KB | 40-100 KB | 25-65 KB |
| 800×600 | 35-90 KB | 22-55 KB | 15-35 KB | 10-22 KB |
Tip: For best results with the 20KB target, resize your image to approximately 400px wide first, then compress.