About the Protect PDF
Send contracts, payslips and medical records safely by locking them with a password. Set the password needed to open the PDF and an optional owner password for permissions, and download an encrypted copy (128-bit).
How to Use the Protect PDF
- Click the upload box and choose your file, or simply drag and drop it in.
- Adjust the available options to match what you need.
- Click the action button and let House of Convert do the work in seconds.
- Download your result instantly — no email, no account, no watermark.
Why Use the Protect PDF at House of Convert?
- Free forever — every tool on this site is free to use, with no hidden limits.
- Private by design — your file is processed for this request only and never stored on our servers.
- Fast — results are usually ready in a few seconds, even for larger files.
- No installation — works entirely in your browser, on desktop or mobile.
Frequently Asked Questions
How do I password protect a PDF?
Upload the PDF, type a password and click Protect. Download the encrypted PDF.
What is the owner password for?
It controls permissions such as printing and editing. If you leave it empty, it’s the same as the open password.
How strong is the encryption?
128-bit encryption, supported by all common PDF readers.
What makes a good PDF password?
At least 12 characters with letters, numbers and symbols. Use our Password Generator for a strong one.
How do I send the password safely?
Share it separately — for example by SMS or phone, not in the same email as the PDF.
What if I forget the password?
It can’t be recovered here. Keep an unprotected copy somewhere safe.
Can I protect a PDF without Acrobat?
Yes, this free tool works in any browser.
How do I remove the password later?
Use Unlock PDF with the password.
Does the Protect PDF tool work on iPhone and Android?
Yes.
Does the Protect PDF tool store my file and password?
No, both are discarded immediately.