Compress PDF
Reduce PDF file size by up to 90% online free. Compress large PDFs for email, web upload, or storage without losing quality. No signup required.
How it works
- 1
Upload your PDF
Upload the PDF you want to compress.
- 2
Compress PDF
Click Compress. ConvertAPI reduces the file size while preserving readability.
- 3
Download
Download the compressed PDF. Files are deleted after 2 hours.
Frequently asked questions
How much can it compress?
Compression depends on the PDF content. PDFs with many images can be reduced by up to 90%. Text-heavy PDFs typically see 20–50% reduction.
Will quality be affected?
The tool uses smart compression that balances file size and visual quality. Text remains sharp and readable.
Can I compress a password-protected PDF?
No. Remove the password first, then compress.
Is there a file size limit?
File size limits depend on your plan: Freemium 5 MB, Starter 100 MB, Pro 250 MB, Business 500 MB.