PDF compression guides

PDF to JPG vs PNG

Choose the image format by page content and downstream use.

By PDFStay Editorial Team

Last updated

Choose JPG for photographic PDF pages when smaller image files matter and some compression artifacts are acceptable. Choose PNG for screenshots, diagrams, line art, and text-heavy pages where sharp edges matter more than byte size. Neither format preserves PDF text, links, forms, bookmarks, or signatures. Export a representative page in both formats and compare readability, dimensions, transparency, and destination limits.

Why does PNG often look sharper for text and diagrams?

PNG uses lossless raster compression and preserves exact pixel edges, while JPG approximates image detail to reduce storage. JPG artifacts are more visible around high-contrast text, thin lines, and flat-color regions.1, 2, 3

Decision guide for pdf to jpg vs png
SituationPractical actionWhat to verify
Photos and continuous tonesStart with JPGInspect faces and gradients1
Text, UI, or diagramsStart with PNGCheck dimensions and file size2

How should you verify the final PDF?

  1. Keep the original file unchanged and work from a clearly named copy.
  2. Compare the same page at the final display size and retain the original PDF for document features.1
  3. Open the exact downloaded file in a second viewer before sending or uploading it.
  4. Save the destination receipt or delivery evidence when the document matters.

FAQ

Is PNG always sharper than JPG for a PDF page?

PNG avoids JPEG artifacts, but useful sharpness also depends on render resolution. Photographs may be much larger as PNG without a meaningful benefit.

Which format is better for diagrams and screenshots?

PNG is often preferable for flat colors, text, lines, or transparency, provided the destination accepts the resulting file size.

Sources

  1. MDN Web Docs — Image file type and format guideofficial technical documentationSource reviewed:
  2. PDFStay PDF to Images toolPDFStay first-party dataSource reviewed:
  3. PDFStay Privacy PolicyPDFStay first-party methodologySource reviewed: