Compress PDF
Shrink PDF files until they are small enough to email – especially effective for scanned documents. All compression runs in your browser, with no upload and no server ever seeing your paperwork.
Drop PDF files here
PDF files · up to 50 files · 100% on your device
How it works
- 1
Choose PDF files
Drag one or more PDF files into the field above – whole batches are compressed one after another.
- 2
Pick a compression level
“Balanced” (150 dpi) for comfortably readable documents, or “Strong” (100 dpi) for the smallest file – e.g. for tight mailbox limits.
- 3
Save the smaller PDF
Save the result straight from the browser and compare the file size before sending.
Your benefits
Finally fits the attachment
Mailboxes often cap attachments at 10 or 20 MB. Scanned contracts and receipts typically shrink to a fraction of their size with raster compression.
Confidential paperwork stays local
The documents people need to shrink – contracts, applications, medical letters – are usually confidential. Here they demonstrably never leave your device.
Honest about the method
Pages are rebuilt as compressed images. That's ideal for scans; for text documents the text is no longer selectable afterwards – we say so openly instead of hiding it.
Frequently asked questions
Is my PDF uploaded for compression?
No. Compression runs entirely locally in your browser. Your file never leaves your device – our Content Security Policy makes uploads technically impossible.
How does the compression work technically?
Every page is rendered in the browser and written back into the PDF as a compressed JPEG (raster compression). Scans and image-heavy documents see the biggest savings.
Does text stay selectable in the PDF?
No. After raster compression the pages consist of images – text can no longer be selected or searched. For scans that's irrelevant; for text documents keep the original as well.
How much smaller will my PDF get?
It depends on the content. Scanned documents often shrink by 70 to 90 percent. Already highly compressed PDFs barely shrink – in rare cases the raster version can even come out larger.
What do “Balanced” and “Strong” mean?
“Balanced” renders at 150 dpi and stays crisp on screen. “Strong” uses 100 dpi for the smallest file – fine for reading, ideal when every megabyte counts.