Report the page count, per-page dimensions and document metadata of a local PDF. Read-only: the file is never modified. Call this before merging or extracting so page numbers are known to be valid.

Combine two or more local PDFs into a single file, in the order given. Runs entirely on this machine with pdf-lib — nothing is uploaded and no URL is fetched. Refuses to overwrite an existing output unless overwrite is true.

Write a selection of pages from a local PDF into a new file, leaving the original untouched. Pages are 1-based and may be given as a list and ranges, e.g. "1-3,7,10-12". Order is preserved, so "3,1" produces a two-page file in that order.

Normalize messy text: collapse repeated spaces, strip trailing whitespace and invisible characters, unify line endings, and optionally collapse blank lines, convert smart punctuation to ASCII, or remove URLs. Runs entirely offline — nothing is uploaded and no network call is made.