# Compress & Optimize PDFs

Compressing a PDF reduces its size mainly by saving embedded images at a lower resolution or quality and dropping data that the pages do not use. Optimizing can also mean converting to PDF/A, the ISO 19005 archiving standard, which requires embedded fonts and forbids encryption so the file can be reproduced reliably later.

## Tools

- Compress PDF (Coming soon): Reduce the file size of a PDF so it fits email attachment and upload limits.

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Category: [PDF Tools](https://techolm.com/pdf-tools)