Why Is My PDF So Large? Find the Real Cause Before Compressing
A PDF with ten scanned pages can be larger than a hundred-page text report. File size is usually driven by images, not just page count.
Keep an original copy, define the rule before processing, and verify the result after processing.
Scan resolution is often the main cause
High-DPI color scans can grow very quickly. Text-only documents rarely need photo-level resolution.
Choose scanning settings based on whether the file is for printing, archiving, or mobile reading.
Embedded images also matter
Large PNG files, camera photos, or uncompressed graphics can inflate a PDF.
If possible, resize and compress source images before creating the PDF.
Remove unnecessary content first
Blank pages, duplicates, and unused attachments still consume space.
Content cleanup before compression usually makes more sense.
Do not optimize past readability
Aggressive compression can make small text, barcodes, or signatures hard to read.
Use readability as the lower limit, then reduce only unnecessary file weight.
Open the matching WUCJ tool and try the workflow directly in your browser.
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