How to Reduce PDF Size

Reduce PDF size with PDF file compression online free — Reduce PDF size

Add a large PDF for PDF file compression online free — Upload large PDF

Save the smaller file after PDF file compression online free — Download reduced PDF

Pick quality level for free unlimited PDF compression — Select quality

Need a smaller attachment? PDF file compression online free helps when email or portal limits reject large scans. Start with a medium setting, then tighten only if the size is still too high.

Download the reduced PDF file after compression — Download smaller PDF

Email systems and government portals often cap attachment size. Reducing PDF size is usually about compressing embedded images, not deleting your content.

Steps

Open Compress PDF.
Add the large PDF.
Choose a compression level. Medium is a good starting point for mixed text and scans.
Download the smaller file and check both file size and readability.

If the file is still too big

Run compression again with a stronger setting.
Split the document with Split PDF and send parts separately.
Remove blank pages if the scan includes many empty sheets.

Related guide: Compress without losing quality.

Open Compress PDF

Related tools and guides

Merge PDF · Compress PDF · Protect PDF · JPG to PDF · PDF to Word · PDF Tools hub · All guides · FAQ