Compression
Techniques used to reduce file size while balancing quality.
Definition
Reduces bytes by encoding text, vectors, and images more efficiently.
Why it matters
Directly impacts upload speed, storage cost, and sharing constraints.
Related PDFHQ workflows
Use this concept when optimizing, converting, validating, or troubleshooting document workflows.
Related Knowledge
Image-specific size reduction methods used inside and outside PDFs.
Compression that preserves all original data.
Compression that permanently discards some detail for smaller files.
Portable Document Format is a fixed-layout document standard designed to preserve appearance across software, operating systems, and devices.
JBIG2 is a bi-level image compression standard optimized for scanned text-like pages.
Reducing image pixel dimensions to lower file size and processing cost.
The relationship between original size and compressed output size.
Common PDF compression filter based on DEFLATE.
Dots per inch, a common density measure in scanning and printing.
Tools to Apply This
Combine multiple PDF files into a single document.
Reduce file size without sacrificing readability.
Split one PDF into multiple files by page range.
Add text or image watermarks to PDF documents.
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