How to Compress a PDF Without Losing Quality

The 25 MB email limit

Gmail caps attachments at 25 MB. Outlook is 20 MB. Most upload forms cap somewhere between 5 and 10 MB. Compressing a PDF is usually the answer — but compress too aggressively and text turns fuzzy.

What actually happens when you compress a PDF

A quality compressor doesn't just "shrink the file"; it makes several targeted decisions:

1. Re-encode images using more efficient formats.
2. Downscale oversize images.
3. Strip metadata — thumbnails, unused fonts, revision history.

Choosing a compression level

Lazy PDF's Compress PDF tool offers three preset tiers: Low, Medium, and High compression. Select the one that fits your balance of file size versus image clarity.

Open Compress PDF →