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How to merge password-protected PDFs

Combine locked PDFs into one file when you know each open password—or one shared passphrase. Browser-local merge for mixed locked/unlocked stacks.

Open Merge PDF files ↗

What people are asking

Staff assembling packets where some exhibits are encrypted and some are not.

Half the exhibits are locked with the same year-end password. Enter it once as default; merge the rest.

What Merge PDF files actually does

  • Per-file passwords plus optional default password for shared passphrases.
  • Reorder after unlock during the merge workflow.

What it does not do

  • Crack unknown passwords.

Steps

  1. Open Merge PDF files.
  2. Add files; enter each open password (or one default).
  3. Reorder; download the merged PDF.

Related guides

Merge without Adobe · Unlock known password · Batch password protect

Go deeper

Scenario guides hub · Open Merge PDF files · All PDF tools · Privacy

Last updated 2026-08-20 · Research-backed long-tail