Compress PDF
Shrinks and optimizes the images inside a PDF and its structure. Text and vector graphics are left untouched.
Runs in your browser. Files aren’t uploaded.
Choose a PDF
Drop a PDF here, or choose from your device.
How to use Compress PDF
- 1Choose a PDF.
- 2Pick High compression for the smallest file, or Low to keep images closer to the original.
- 3Select Compress PDF and compare the original and new sizes before downloading.
Good to know
- Compression works on the photos and scans inside a PDF: they are scaled down and re-saved as JPEG. Text, fonts and vector graphics are kept as they are.
- PDFs that are mostly text often can’t get much smaller. If the result wouldn’t be smaller, you’ll be told and the original is kept.
- Images with unusual colour formats (such as CMYK) are left unchanged.
- Password-protected PDFs need their password; the compressed copy isn’t password-protected.
Supported files
- Input
- PDF, up to 150 MB
- Output
- A smaller PDF, if it can be made smaller
Processing happens on your device, so very large files depend on its memory. Free, with no sign-up or watermark.
What people use it for
- Get a scanned PDF under an email or upload size limit
- Shrink photo-heavy reports before sharing
- Save storage on large image PDFs
Compress PDF questions
Something else? Visit support
It depends on what’s inside. PDFs made of photos or scans usually shrink the most; text-only PDFs often can’t get much smaller. You see both sizes before downloading, and if the result isn’t smaller the original is kept.
High gives the smallest file and is fine for reading on screen. Medium is a balance. Low keeps images closest to the original, which suits printing.
No. Only photos and scans inside the PDF are recompressed. Text, fonts and vector graphics are left untouched.