Protect PDF
Protect PDF files online for free. Add password protection before sharing sensitive documents with UsePDF.io.
Drop a PDF to protect
Upload one PDF and lock it with a password.
or drag files here
Use a password you can share securely with the people who need access.
Supported formats
Source PDF
Review the uploaded PDF before protecting it.
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Upload a PDF to preview its pages here.
Upload a PDF to begin
Add a password to protect your PDF before sharing it.
Password protection
What this tool does
Protect PDF adds password protection to a document before you send, store, or share it.
Set a password, export the protected file, and share the password through a separate channel. This helps reduce accidental access to sensitive PDFs.
Upload one PDF and download a password-protected version. UsePDF.io keeps the workflow simple: upload your file, review the result when preview is available, and download the output when processing is complete.
How to use it
- 1Upload a PDF.
- 2Enter and confirm a password.
- 3Download the protected PDF.
Supported formats
File privacy: Files are processed only for the action you request. We avoid using document contents for analytics, and you should only upload files you have permission to process.
Related tools
Frequently Asked Questions
Is Protect PDF free to use?
Yes. You can use Protect PDF on UsePDF.io for free with no sign-up required for the basic workflow.
Do I need to create an account?
No. You can start in the browser without creating an account. Some higher-volume limits may require signing in later.
Are my files secure?
Files are processed only to complete your requested task and are not used for analytics, resale, or training. Avoid uploading documents you are not authorized to process.
Which file formats are supported?
Protect PDF supports PDF. The page also shows accepted upload types before you choose a file.