Choose Merge PDF for
- Combining invoices
- Joining reports
- Creating document packs
- Putting scanned pages in one file
Merge PDFversusCompress PDF
Merge PDF vs Compress PDF: What Is the Difference?
Understand when to combine documents and when to reduce their file size, including the best order for common PDF workflows.
Quick decision
Merge when several PDFs must become one document. Compress when a PDF is too large to upload, email or store. For multiple large files, merge first and compress the final document.
Feature
Merge PDF
Compress PDF
Main purpose
Combine multiple documents
Reduce document file size
Page count
Usually increases
Usually stays the same
Document order
User controls file and page order
Original page order is retained
Possible quality change
Normally none
Images may be recompressed
Typical workflow
Organise first
Optimise before sharing
Choose Compress PDF for
- Email attachment limits
- Portal upload limits
- Reducing storage use
- Faster document sharing
Related tools
Frequently asked questions
What is the main difference between Merge PDF and Compress PDF?
Merge when several PDFs must become one document. Compress when a PDF is too large to upload, email or store. For multiple large files, merge first and compress the final document.
When should I use Merge PDF?
Combining invoices, Joining reports, Creating document packs, Putting scanned pages in one file.
When should I use Compress PDF?
Email attachment limits, Portal upload limits, Reducing storage use, Faster document sharing.