How it works

Drag any row (⠿) to reorder, or use ↑ / ↓ — the merge follows the order shown top to bottom. Quick sort by filename and reverse buttons handle bulk reordering.
Page ranges: each file has a page range box. Leave it blank to include the whole document, or enter something like 1-3,7 to merge only those pages from that file.
Insert blank page adds a separator page between each source document — useful when the merged PDF will be printed double-sided.
Add files in multiple batches; each new selection is appended rather than replacing what's already there.
A short ad plays before your download starts — it helps keep this tool free.
All processing happens locally in your browser using pdf-lib — your files are never uploaded anywhere.