Compress PDF Online — Free, Private, No Upload

How to compress a PDF

1. Drop your PDF into the box above — it opens instantly, nothing is uploaded.
2. Pick a level: Balanced keeps text selectable; Strong and Maximum flatten pages to images for far smaller files.
3. Hit Compress and download. The size saved is shown, and you can grab a privacy receipt proving the file never left your device.

Frequently asked questions

Is it really free?

Yes — compression is fully free, with 5 free tasks a day. Pro (

/mo) removes the daily cap.

Is my PDF uploaded to a server?

No. Kameleo compresses the file inside your browser using WebAssembly. You can verify it: open your browser's Network tab while compressing — no file upload happens.

Why is my PDF still big after Balanced?

Balanced repacks the PDF's internal structure without touching image quality. If the file is mostly scanned images, choose Strong or Maximum — they re-encode pages and typically save 60–90%.

Will the text stay selectable?

On Balanced, yes. Strong and Maximum flatten each page to an optimized image, so text is no longer selectable — that trade-off is what makes the file dramatically smaller.