PDF Toolbox

Fifteen tools, one app, bought once: split a PDF by page ranges (1-3,7,9-12) or every N pages; merge several PDFs in order, interleaved or reversed; compress and see the real before/after size; add a watermark, page numbers or Bates numbers; set or remove a password; read the words off a scan so they can be selected and searched; and run a job across many files at once.

The real problem with a PDF app is not whether it works offline. It is what it does to your file once you trust it: corrupted files, blank saves, lost annotations, disappearing pages. PDF Toolbox is built around one rule — your file is never modified, and every PDF it writes is checked before you see it. Your original is opened read-only; every job builds a new file, checks it, and only then hands it to you. If a check fails you get a plain error and no file, never a broken one labeled as done.

Bought once. Fully offline — no account, no analytics, no network requests.