PDF tools

Add a passwordto any PDF.

Lock a PDF before you email it or store it somewhere shared. Anyone who opens the copy will need the password you set.

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One-time purchase · macOS 26 or later · Works offline

Add Password open in OneMacApp, with its settings in the inspector.

How it works

Three steps.Nothing to learn.

  1. 1

    Drop your PDFs

    Add one document or a batch. Every file gets the same password.

  2. 2

    Type a password

    Enter it in the inspector. Pick something you will remember, or keep it in your password manager.

  3. 3

    Press Add Password

    Locked copies land in a dated OneMacApp folder in Downloads. The unprotected originals stay where they were.

The details

Everything you’d want.Nothing you wouldn’t.

  • Asks before it opens

    The protected copy needs the password to open in Preview, a browser or any other PDF reader.

  • Lock a batch at once

    Drop in a folder of statements or reports and protect them all with one password in a single step.

  • Your password stays local

    The password is used on your Mac to lock the file. It is not sent anywhere.

  • Originals kept

    OneMacApp writes new, protected copies, so you always have the open version for yourself.

Add Password

Opens
PDF
Saves as
Password-protected PDF
Setting
One password for the batch
Batch
Any number of files at once
Originals
Never changed

FAQ

Questions,answered.

Open Add Password, drop in the PDF, type a password in the inspector and press Add Password. The locked copy is saved in a new folder in Downloads.

The protected copy cannot be opened without it, and OneMacApp cannot recover it. Your original, unprotected file is still in its usual place, so keep that or store the password somewhere safe.

Yes. Drop in as many as you like. They all get the password you typed.

No. Any standard PDF reader, including Preview on a Mac and the readers built into browsers, will ask for the password and then open the file.

Use Remove Password with the same password. It saves an open copy of the PDF.

More pdf tools

Same app.Plenty more to do.

Add Password is one of 39 tools in OneMacApp.

Video, audio, images, PDFs and on-device AI in one native Mac app. Pay once and every tool is yours, including the ones we add next.

Get OneMacApp · $29₹1,499

One-time purchase · macOS 26 or later