Will the image quality be bad at 20 KB?

For small social-media thumbnails and form uploads it will look fine. For large print photos some loss is expected.

What formats are supported?

Input: JPEG, PNG, WebP. Output: JPEG or WebP (your choice).

Is there a file size limit?

No hard limit, but files over 100 MB will show a warning and may be slow on low-end devices.

Can I compress multiple images at once?

Bulk mode coming soon! Currently one image at a time.

Will my file be uploaded to a server?

No. Everything runs in your browser using WebAssembly. Your file never leaves your device.

Compress Image to 20 KB

Reduce your photo to under 20 KB in under a second — free, private, browser-only.

🔒 Your file never leaves your device

Drop your image here

JPEG, PNG, WebP · click, paste or camera

📎 Click⌨️ Paste📸 Camera

📖 How to use

Upload your photo, hit Compress, and MilliPDF will binary-search the best quality setting to land under 20 KB without visible damage. Supports JPEG and WebP output.

Compress Image to 20 KB

📖 How to use

❓ Frequently Asked Questions

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