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Lock with a password

Protect PDF

Add a password and strong AES-256 encryption so only the right people can open it.

This tool shows you how to protect a PDF by password. Upload your file, choose a password, and download a protected PDF that only opens for people who have it — free, no signup, no watermark.

Some documents aren't meant for everyone — a contract, a statement, personal paperwork. Adding a password encrypts the PDF so it stays private if it's emailed to the wrong person or stored in the cloud. It runs on the server, needs no account, and deletes files after processing — a fast way to password protect a PDF on any device.

How to use it

  1. 1Upload the PDF you want to protect
  2. 2Choose a password for the file
  3. 3Tap protect to add the password
  4. 4Download your password-protected PDF

Key features

  • Protect a PDF by password — free online, no signup
  • Adds an open password to your PDF
  • Encrypts the file so only people with the password can open it
  • Helps keep private documents private
  • Runs in any browser on desktop and mobile
  • Files deleted automatically after processing

What it does

  • Adds a password to a PDF
  • Encrypts the file so it asks for the password to open
  • Keeps the contents private from anyone without it
  • Protects a document before you share or store it
  • Works with no login and no signup

What you get

  • A password-protected copy of your PDF
  • A file that asks for the password to open
  • Your original content kept intact
  • Secure processing with automatic file deletion

Common use cases

  • Protect a PDF before emailing it
  • Lock a private document with a password
  • Secure a file before storing it in the cloud
  • Keep a shared report readable only by the right people
  • Add a password to a sensitive form

Who it's for

  • Anyone emailing a private document
  • Office workers sharing confidential files
  • Freelancers sending client paperwork
  • Students protecting personal documents
  • People storing sensitive PDFs online

Before and after

BeforeA private PDF opens for anyone who has it.
AfterIt opens only for people with the password.
BeforeA file emailed by mistake is fully readable.
AfterWithout the password it stays locked.
BeforeA cloud-stored document has no protection.
AfterA password keeps it private.

Good to know

Why people trust it

How to protect a PDF by password for free

Not every PDF is meant for everyone. A contract, a bank statement, or personal paperwork can end up emailed to the wrong person or sitting in a shared cloud folder. Adding a password keeps the file private: it can only be opened by someone who has the password, so a misdirected email or a shared drive isn't a problem.

To protect here, upload your PDF, choose a password, and download the protected copy. The file is encrypted, so anyone who opens it is asked for the password first. This is how to protect a PDF by password, free, with no account and no watermark.

Wondering how to password protect a PDF without software? This works right in your browser — no install, no signup. It's a simple way to encrypt a PDF: upload, set a password, and download. Whether you're securing a document before email or before storing it online, only the right people can open it.

Keep your password somewhere safe — without it the file can't be opened — and share it through a separate channel from the file itself. Everything runs on the server and your files are deleted automatically after processing, so protecting a private document stays private. A simple, free way to password protect a PDF — no account required.

Also known as: password protect pdf, encrypt pdf, lock pdf, secure pdf.
FAQ

Frequently asked questions

How do I protect a PDF by password for free?

Upload your PDF, choose a password, then download the protected file — free, with no signup or watermark. It can only be opened with the password.

Does it encrypt the PDF?

Yes. The file is encrypted and asks for your password to open, so its contents stay private from anyone without it.

What happens if I forget the password?

Keep your password safe — without it the protected file can't be opened, so store it somewhere secure and share it carefully.

Can I protect a PDF on Mac or mobile?

Yes. It runs in any browser, so you can password protect a PDF on Windows, Mac, iPhone and Android with nothing to install.

Is it really free with no sign up?

Yes. Protecting a PDF is completely free, with no account, no signup and no watermark. Files are deleted automatically after processing.

🔒 Processed privately on the server 🗑️ Files deleted automatically 🚫 Never shared with third parties