PDF compression guides

Compare an Original PDF with Its Output

A practical workflow for PDF output comparison: protect any edited or compressed PDF and check the final PDF before sharing or uploading it.

By PDFStay Editorial Team

Last updated

Compare the source and downloaded output using size, page count, visual detail, and functional checks. Start with the destination requirements, work from a copy, and inspect the downloaded result. Compare page count, text, images, links, forms, orientation, and the details important to the final use. This keeps the workflow reversible and gives you a concrete final file to review before the next step.

Prepare the PDF output comparison before processing

Compare the source and downloaded output using size, page count, visual detail, and functional checks. Record the source filename, size, page count, and any destination rules first. PDFStay's normal PDF output comparison workflow is designed to process the PDF in the current browser session rather than upload it to PDFStay servers. Your own organization or destination policy remains the final authority.1, 2

Pre-processing checks
CheckWhy it matters
Keep an untouched source copyYou can compare or recover the original
Read the destination rulesSize alone may not determine acceptance
Identify any edited or compressed PDFThese details need a close final inspection

Verify the downloaded output

  1. Create a working copy of the PDF output comparison.
  2. Run the task in PDFStay using the /compress-pdf workflow.
  3. Download the result with a distinct, descriptive filename.
  4. Open the exact output and compare page count, text, images, links, forms, orientation, and the details important to the final use.

FAQ

What should I compare between two PDFs?

Compare page count, text, images, links, forms, orientation, and the details important to the final use. Keep the source until the final recipient, portal, or reviewer has accepted the output.

Does PDFStay guarantee that every PDF output comparison will be accepted?

No. PDF behavior depends on the source file, browser memory, document features, and the destination system. Follow the destination instructions and verify the exact output.

Sources

  1. PDFStay — Compress PDF workflowPDFStay first-party methodologySource reviewed:
  2. PDFStay Privacy PolicyPDFStay first-party methodologySource reviewed: