Which PDF Compression Level Should I Use?
Direct answer
Start with Recommended for ordinary screen sharing. Use Less when print, fine detail, handwriting, or scan accuracy matters. Use Extreme only for a strict size limit and inspect the result carefully.
Why this happens
No level is universally best because a PDF can mix crisp vector text with low-resolution scans, photographs, diagrams, and screenshots. The most sensitive page should influence the setting.
Less compression retains more image detail but may miss a tight upload cap. Recommended balances file size and normal screen readability. Extreme downsamples and recompresses images more aggressively.
A portal accepting the file does not prove the content is usable. Always open the downloaded copy and inspect the details the recipient needs.
Quick selection guide
- Less: print, photographs, handwriting, barcodes, medical or evidentiary scans.
- Recommended: reports, ordinary forms, email copies, and general portal uploads.
- Extreme: last resort for a strict cap when splitting is not permitted.
- Original only: digitally signed files and required PDF/A archival masters.
What BytesPDF does
BytesPDF exposes the three modes explicitly and rejects digitally signed PDFs. Actual savings are shown after processing rather than promised in advance.
Related answers and guides
Related privacy-sensitive scenarios
Scenario guides with destination checks for the document you are preparing.
Test your PDF locally
PDF content stays in the browser tab and is not uploaded to BytesPDF servers.