ClockworkPDF

Combine multiple PDFs into one document. Options include blank-page insertion for odd page counts, page-number footers, page-size normalization, AcroForm field handling, bookmark merging, and an optional table of contents.

Divide a PDF into multiple files. Split after every page, even/odd pages, specific page numbers, or every *n* pages.

Pull selected page ranges from one or more PDFs. Output a single combined file per source, or separate files for each range.

Insert pages from a second PDF into a base document on a repeating interval (for example, every *n* pages).

Rotate pages in batch across multiple files. Target all pages, even/odd pages, or a custom page range at 90°, 180°, or 270°.

Interleave pages from multiple PDFs into one output file (useful for duplex printing or combining front/back scans).

Reduce file size with lossless and image-based optimization. Options include stream compression, metadata removal, unused-object cleanup, structure rebuild, image re-compression, and removal of annotations, forms, or attachments.