Keep the source
Save the originals before merging or splitting. For password-protected or restricted documents, check the permitted operations first.
Check order and orientation
After merging, review the first and last pages and every junction between files. When splitting, check that the entire intended range is included. Reopen rotated pages to verify orientation.
Review readability after compression
Results depend on embedded images and existing compression. Zoom into small text and drawings. Preserve originals when clarity matters.
Use PDF One
PDF One provides merge, split, rotation, compression and watermark tools. Reopen processed files before sharing. Check the store for paid features and prices.