PDF Quality: Vector vs Raster Pages

Two PDFs can look identical on screen and behave completely differently. One has crisp vector text that prints at any size; the other is a stack of JPEG images. Knowing what's actually inside dictates how you compress, archive, and print.

What's Inside a PDF Page

When to Rasterize

Rasterizing collapses everything to pixels. You lose searchability, accessibility, and editability — but you gain absolute visual fidelity, no font substitution risk, no transparency issues, and a guarantee that the recipient cannot extract or alter content as text.

• Final-stage approvals: "what you see is what gets printed."
• Legal exhibits: capture the document state without giving away searchable text.
• Older RIPs: some print pipelines mishandle live transparency; flattening to raster avoids it.
• Embedded fonts you can't license: rasterize pages with the problematic font to keep the look.

When to Keep Vector

• Long-term archives — vector text remains crisp at any future zoom, font substitution aside.
• Anything searchable or screen-reader accessible — raster pages need OCR to be searchable.
• Small file sizes for text-heavy documents — vector text often compresses to a few KB per page.
• Documents that may be edited later.

Choosing Resolution

When you do rasterize, pick DPI based on the finest detail you must preserve. 300 DPI is the print standard for body text; 600 DPI captures fine hairlines and small caps; 150 DPI is plenty for monitor viewing. Doubling DPI quadruples bitmap size, so don't reach for 1200 DPI without a real reason — it almost never improves perceived quality.