How do I put a password on a PDF for free?

Upload to Protect PDF, set the password, download — the copy is encrypted, free with fair limits.

What is the best kind of PDF password?

A long passphrase you have recorded — length is strength, and recording beats remembering.

How do I send the password to the recipient?

A different channel than the file — email the document, call or message the password.

What if the password gets lost?

The protected copy stays sealed permanently — which is why you archive an unprotected original first.

How to Password Protect a PDF

Protecting a PDF takes thirty seconds; protecting it WELL takes this guide: the setup, the password craft, the sharing protocol, and the one warning everyone learns eventually — passwords we never store cannot be recovered.

Free Encrypted Deleted in 1 hour

1Upload
2Configure
3Download

Drag & drop your file here

or click to browse · Up to 15 MB

Select file

Accepted: PDF

256-bit SSL encrypted No sign-up to start Auto-deleted in 1 hour

Your files are processed temporarily and deleted automatically — there is no general cloud storage. File deletion.

How to protect pdf

Simple steps — no software to install.

1
Upload and set the password
A recorded passphrase.
2
Archive your unprotected original
The lost-password insurance.
3
Share via separate channels
File one way, password another.

Why use our Protect PDF

Secure & private

Files are encrypted in transit and deleted automatically after processing.

Fast results

Optimized processing returns your file in seconds.

Free to start

Core tools are free with daily limits — no install required.

Works anywhere

Runs in your browser on any device, anywhere in the world.

The setup

Upload to Protect PDF, set the password, download the encrypted copy — the contents are now unreadable without it. Free with fair daily limits, works in any browser, nothing installed.

Password craft and sharing protocol

Length beats complexity — a passphrase outperforms a clever word. Record it (password manager or safe note), then share file and password by DIFFERENT channels: document via email, password via call or message. Same-channel sharing protects against nothing.

The permanent warning

Encryption is honest: no password, no access, no recovery — by us or anyone. Archive an unprotected original for yourself before distributing protected copies. Files are processed temporarily and deleted automatically — there is no general cloud storage.

Complete setup walkthrough
Passphrase guidance
Two-channel sharing protocol
Lost-password honesty
Free with fair daily limits