Protect PDF

Add strong password protection to a PDF — set a password once, and only people who know it can open the file.

About this tool

Before sending a sensitive PDF — a contract, a financial statement, personal records — adding a password means only someone who knows it can open the file, even if it ends up in the wrong inbox.

Set a password once and this tool encrypts your PDF with AES-256, a strong, industry-standard form of encryption. Share the password with your recipient through a different channel than the file itself for the best protection.

How it works

  1. 1. Upload your PDF file.
  2. 2. Enter and confirm a password.
  3. 3. Download your password-protected PDF.

Supported formats

Accepts: PDF — Max file size: 100MB — Output: .pdf

Accepts a single PDF file up to 100MB. Output is the same PDF, encrypted with the password you set.

Features

Privacy & security

Your file is transferred securely and automatically deleted from our servers after 1 hour.

Frequently asked questions

How strong is the encryption?

PDFs are encrypted with AES-256, a strong, widely trusted standard.

What if I forget the password?

There's no way to recover it — we don't store your password, so keep it somewhere safe.

Is this free?

Yes, protecting PDFs is free.

Is my password stored anywhere?

No — your password is never logged or stored, and your file is deleted automatically after 1 hour.

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