PDF Compression Guide

Compression choices affect readability, file size, and whether forms remain acceptable for upload portals.

Scanned PDFs

For ordinary records, grayscale around 150 to 200 DPI is often readable. For small print, stamps, or signatures, keep more detail.

Text PDFs

Text-heavy PDFs usually shrink well because fonts and repeated objects can be optimized without damaging readability.

Final Check

After compression, zoom in on names, dates, QR codes, signatures, and small print before sending.

Practical example workflow

Prepare a separate sharing copy before editing a PDF. Keep the original file private, then create a review copy for compression, merging, redaction, OCR, or upload-size adjustments.

Open the final PDF in a different viewer from the one that created it. Check page order, rotated pages, missing fonts, links, signatures, stamps, metadata, bookmarks, and whether text can be searched or copied when that matters.

Quality checks before sending a PDF

If the PDF contains personal, financial, medical, school, or client information, remove unnecessary pages and use real redaction instead of covering text visually. Search for redacted words after saving to confirm they are gone.

For official submissions, keep a full-quality archive copy and a smaller upload copy with clear filenames. If a portal has file-size or format rules, check those rules before the deadline rather than compressing repeatedly at the last minute.