Protect PDF
Add a password to open a PDF and restrict printing/copying.
Protect PDF
Free online tool · instant results
Protect PDF workspace
What it does
Add a password to open a PDF and restrict printing/copying.
Best for
Add a password to open a PDF and restrict printing/copying.
Time
~1 min to complete
Pricing
Free forever
Access
No signup required
Privacy
Runs in your browser
Overview
About this tool
A clear look at what this tool is for and why people use it.
Protect PDF
Add a password to open a PDF and restrict printing/copying.
Files are processed in private temporary storage and deleted automatically. Downloads use short-lived signed URLs.
Why use it
Benefits
Everything you need for a fast, confident answer — nothing you don’t.
Free PDF processing in your browser sessio
Free PDF processing in your browser session
Secure private temporary storage with auto
Secure private temporary storage with automatic cleanup
Signed short-lived downloads
Signed short-lived downloads
Dark mode and mobile-ready workspace
Dark mode and mobile-ready workspace
Walkthrough
How to use
Simple steps from empty form to a result you can use.
-
1
Upload one or more
Upload one or more PDF files (drag and drop supported).
-
2
Configure options if shown, then process.
-
3
Download the result using
Download the result using the secure link before it expires.
-
4
Files are deleted automatically after the retention period.
Under the hood
How it works
Follow the path from input to output — transparent and easy to scan.
Pages are re-exported and
Pages are re-exported and SetProtection applies RC4 password security with print/copy permissions set.
Pro tips
Tips
Small habits that make this tool even more useful day to day.
Get accurate results
Double-check units and inputs before you rely on Protect PDF output for anything important.
Work faster
Use the examples below as a starting point, then tweak values to match your scenario.
On any device
This tool is mobile-friendly — bookmark the page so you can reopen it in one tap.
Watch out
Common mistakes
Avoid these slip-ups so your result is ready the first time.
Leaving required fields blank
Enter every value the workspace asks for before calculating — empty fields usually block a result.
Using invalid numbers
Avoid negative values or percentages outside a valid range unless the tool explicitly allows them.
Mixing up units
Keep units consistent (currency, length, weight, time) so the formula returns a meaningful answer.
FAQ
Frequently asked questions
Straight answers to the questions people ask most.
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