SurveyPassword protect a PDF
Lock a PDF so it only opens with your password. Uses strong AES-256 encryption.
or drop them here
Your files stay on this device
How to password protect a PDF
- Choose a PDF.
- Type a password twice, and choose whether people can print or copy.
- Press Lock PDF and save it.
Lock a bid set before you send it
Add a password to bid documents, pricing or contracts, and choose whether people can print or copy from them.
Private
Your files stay on your device. Nothing is uploaded.
Free
No sign-up, no watermark on your file, no daily limit.
Works offline
Once the page loads, it keeps working without the internet.
Any device
Phone, tablet or computer, in Chrome, Edge or Safari.
Questions
How strong is the lock?
It uses AES-256, the strongest kind PDFs support. A long password is what keeps it safe.
What if I forget the password?
We never see your password or your file, so we can't get it back. Keep the password somewhere safe.
Can I do several files at once?
Yes. Choose or drop several files. Each one gets the same settings, and you save them all in one ZIP.
Will it open in other apps?
Yes. Adobe Reader, Preview, Chrome, Edge and other PDF apps ask for the password and open it.
Are my files uploaded?
No. The tool runs in your browser, so your files never leave your device. Nothing is sent to us or kept after you close the tab.
Is it free?
Yes. There is no sign-up, no watermark on your file and no daily limit.
More free PDF tools
Sign PDF
Draw or type your signature onto a PDF.
Flatten PDF
Lock markups and form answers into the page.
Unlock PDF
Take the password off a PDF you can open.
Remove hidden data
Strip metadata, scripts and attachments from a PDF.
Edit PDF details
Change the title, author and keywords.
Remove markups
Strip comments and markups off a PDF.
Need to mark up the PDF too?
Survey is a full PDF app for drawings. Add pens, shapes, clouds and count markers, and keep every sheet in sync on your computer, iPad and phone.
Open Survey free