How much can the file size be reduced?

Results vary by PDF. Files with lots of redundant internal data can shrink significantly; already-optimized files may not change much.

SimpleCyto

Compress PDF

Name: Compress PDF
Author: SimpleCyto

New

Reduce PDF file size instantly in your browser

PDF Tools

How to Use Compress PDF

1Upload a PDF file
2Click Compress PDF
3View the size reduction stats
4Download the compressed file

About Compress PDF

Compress PDF reduces file size by re-saving with optimized object streams. Displays before/after sizes and savings percentage. No content is removed — only internal structure is optimized.

Frequently Asked Questions

How much can the file shrink?

It depends on how much redundant data the PDF contains. Already-optimized files may see little change.

Is compression lossless?

Yes. No content is removed — only the internal PDF structure is optimized.