Available nowPDF tool

Protect a PDF with a password

Set a password for opening a PDF and configure supported document permissions.

This tool creates an AES-256 encrypted copy with user/owner passwords and viewer-enforced permissions.

PDF tool

When this tool helps

This tool creates an AES-256 encrypted copy with user/owner passwords and viewer-enforced permissions. The situations below show what this workflow is designed for so you can choose the tool before uploading a document.

Require a known password to open a copy.
Set viewer permissions for printing and copying.

How it works

Password protect PDF online

The “Password protect PDF online” workflow consists of 3 consecutive stages. Review the settings and expected output at each stage because processing creates a new copy instead of overwriting the source.

01Upload file
Upload the source PDF here.
02Choose settings
Choose the settings and review the expected result before processing.
03Get the result
Download a separate result without changing the source file.

What you can do

The capabilities below describe what is included in the workflow and the resulting file. Use them to confirm whether this tool completes the task or whether another processing stage will be needed.

Open password
Permission settings
Encryption check
Safe password handling

Limits and important details

Limits keep the result predictable by describing supported files, processing boundaries and PDF properties that may require manual review. Read them before starting, especially for complex documents.

A separate output is created; the source PDF remains unchanged
PDFs are not stored in a permanent document library
An inactive guest session expires after 15 minutes
The hard session limit is 2 hours

Before you start

Keep the source file until the result has been reviewed
Check whether the PDF is password-protected or digitally signed
Identify the pages and objects that are expected to change
Use a non-sensitive test copy for an unfamiliar workflow

Result checklist

Open the downloaded copy in a second PDF viewer
Review every changed page at normal and enlarged zoom
Check text search, links, forms and visual quality where relevant
Confirm that confidential data and metadata meet the intended use

Example

Protect a copy with a password

The “Protect a copy with a password” scenario follows a source file through to a separate result. It shows which action is performed and what should be checked after download.

Input: A synthetic unencrypted PDF.
Action: Set a user password and restrict printing in supporting viewers.
Result: A separate AES-256 encrypted copy with verified encryption status.

Privacy

Temporary processing in Germany, EU

The file is processed only inside a temporary guest session. Access closes when the session ends, and source and result files follow the service deletion lifecycle.

No permanent document library
No external AI, OCR or PDF providers
15-minute inactivity timeout
2-hour hard session limit

FAQ

Questions and answers

These answers apply specifically to “Password protect PDF online” and extend the main instructions. They cover settings, expected output and the cases that most often need clarification before processing.

Which protection options will be available?

An open password and separate supported PDF permission settings are available.

Will the password be stored?

Passwords will not be stored or included in logs and analytics.

Are print and copy restrictions impossible to bypass?

No. Permissions are enforced by the viewer and are not DRM.

Help center

Common errors and next steps

When processing cannot continue, the service shows a reason code and a safe next step. Resolve the stated issue and upload again or choose another mode; the source document remains unchanged.

FILE_TOO_LARGE

The source file is larger than the current upload limit.

Choose a PDF of up to 50 MB and upload it again.

PDF_PASSWORD_REQUIRED

The PDF is encrypted and cannot be processed without a known password.

Enter the document password in the password prompt, or choose another file.

Help center →

Help center

Useful guides

Practical guides provide context that does not fit into a short procedure: how to choose a mode, understand processing consequences and handle the document safely.

Passwords, redaction and PDF security How to share a PDF without leaking hidden data How files are stored and deleted

Editorial and technical review: 2026-07-20 · next review: 2026-10-18