Hundreds of PDFs to split, merge
and stamp — one file at a time is the slow way.

• Split — by page ranges (1-3, 4-6, 7-10) or every N pages
• Merge — any number of PDFs, in your order
• Rotate — all pages or a selection, 90 / 180 / 270 degrees
• Extract — pull pages (2, 4-5) into a new file
• Text watermark — adjustable opacity; center (diagonal), top or bottom

Every output is re-opened and force-parsed page by page. The report confirms the file opens, the page count matches, page conservation adds up (split parts sum back to the source; a merge equals the sum of its inputs), rotations really landed, and the watermark is really on every page. Inputs that can't be opened are listed as problems — never silently dropped.

Seeded acceptance suite (10-page document + 4-page document with a blank page and a pre-rotated page): one batch of 6 operations produced 10 outputs, 10 verified — merge 10 + 4 = 14 pages with order intact, rotate +90° exact, watermark confirmed on all 10 pages. The re-check caught a deliberately truncated output, a fake PDF and a page-count mismatch. 20 of 20 acceptance checks pass.