Compress PDF
Reduce a PDF's file size — losslessly, or by rebuilding scanned pages as images when you need much bigger savings.
Free No signup Runs in your browser — nothing uploaded
How to compress pdf
- Drop the PDF that's too big to send.
- Pick lossless (keeps text selectable) or rasterise (much smaller, text becomes image).
- See the real before-and-after size before you download.
Frequently asked questions
- Why did lossless compression barely help?
- Because the PDF was mostly text, which is already compact. The bulk in large PDFs is nearly always embedded images — that's what rasterising targets.
- What does rasterising actually cost me?
- The text stops being selectable, searchable and screen-reader accessible, because each page becomes a picture. For scans that's no loss — they were images already.
- What if the result is bigger than the original?
- KIVO tells you and keeps your original rather than handing back a worse file.