Password Protect PDF: lock and secure your PDF file For Free

Forms filled
Forms signed
Forms sent
Function illustration
Activate an encrypted folder to secure PDF
Function illustration
Create a password to open the folder
Function illustration
Move your PDF there to lock it
Function illustration
Enjoy your password protected PDF

Users trust to manage documents on pdfFiller platform

All-in-one PDF software
A single pill for all your PDF headaches. Edit, fill out, eSign, and share – on any device.

Instructions and Help about secure pdf scanned

With pdfFiller, you can add a password to PDF and protect it in a few simple steps.

Use the Encrypted Folder in the Documents section to add a layer of security to your documents with two-factor authentication.

To activate the Encrypted Folder, enter your mobile phone number. Receive an activation code and create and confirm a password for the Folder.

To add documents to the Encrypted Folder, move them from any other folder. Lock the Encrypted Folder by clicking the key icon or wait for it to lock automatically after 10 minutes of inactivity.

Now your documents are securely stored in the Encrypted Folder and won’t appear in My Documents. Access them by entering the password you’ve set.

How to password protect PDF with pdfFiller:

Activate the Encrypted Folder using your phone number.
Set a secure password to protect the files in the Folder.
Move your documents to the Encrypted Folder.
Enter the password when you need to access your documents.

How to Password Protect PDF: lock and secure your PDF file - video instructions

How to Password Protect PDF: Lock and Secure Your PDF File

Protecting your PDF files with a password is an essential step to ensure the security of your sensitive information. With pdfFiller's Password Protect PDF feature, you can easily lock and secure your PDF files. Follow these simple steps to get started:

Log in to your pdfFiller account. If you don't have an account yet, you can sign up for free.
Once you're logged in, click on the 'MyBox' tab at the top of the page.
In the 'MyBox' section, locate the PDF file you want to password protect and click on it to open it.
After the PDF file opens, click on the 'Protect' tab in the top toolbar.
From the dropdown menu, select 'Password Protect'.
A dialog box will appear where you can enter your desired password. Make sure to choose a strong password that is not easily guessable.
Confirm your password by entering it again in the 'Confirm Password' field.
Optionally, you can choose to set additional permissions for your PDF file, such as allowing or disallowing printing, copying, or editing.
Once you've set your password and permissions, click on the 'Protect' button to apply the password protection to your PDF file.
Your PDF file is now password protected! You can download it or share it securely with others while ensuring that only authorized individuals can access its contents.

By following these steps, you can easily lock and secure your PDF files using pdfFiller's Password Protect PDF feature. Enjoy the peace of mind knowing that your sensitive information is protected!

This may be useful because it may not be necessary to distinguish ‘all biology knowledge to ‘all engineering-relevant knowledge s’, depending on the context. However, we also should be aware that it may not be the case, that ‘all engineering-relevant knowledge is related to ‘all biology knowledge s’. Footnotes Author contributions: T.O., R.C., J.F., D.R., T.S., T.S.K., J.L., K.K.S., M.N., F.P., A.×., and R.A. designed research; T.O., M.P., D.R., T.S., T.S.K., J.L., F.P., A.×., R.K.L., N.M., F.P., and R.A. performed research; R.C., J.F., J.D., J.K., D.R., J.F., V.C., M.A., N.M., F.P., S.C., A.×. performed laboratory work and sample processing; T.O., N.M., F.P., S.C., J.L., K.K.S., M.N., F.P., A.×., and R.A. analyzed data; and T.O., X.A., B.A., R.A. wrote the paper. If you’re not comfortable using a web-based version of any book or course, it is easy to download any PDF version of the book directly from this site by logging in to your Account.. Find all required ‘all biology practical s’—from course listings, to syllabus, to course videos, to course notes, to syllabus revisions, to course evaluation forms, to laboratory manuals, to lab evaluations, to faculty evaluations, to student evaluations—along with an easy way to upload your own PDF's to collaborate with your classmates or other learners. The entire class library, with all the classes, lecture notes, videos and assignments, plus the required textbook, is packed up and ready to go. There's no more waiting for your instructor to answer your question, no more searching for your notes, and no more confusion when your questions go unanswered. Get instant access to all classes, lectures, videos, assignments, and more with this comprehensive class solution. Start with the free trial, so you can save time learning. With one-click, edit course materials. With one-click, edit a textbook or lab manual, or even use your own personal library. In the online learning tools, you can change course material, revise and review a course, add to a lab manual, collaborate with classmates and other learners, and manage your own library from virtually anywhere.

What our customers say about pdfFiller

See for yourself by reading reviews on the most popular resources:
Ashlin M. I
The site is a bit slow, and often will freeze during filling. Otherwise it is well worth the $72.00 I paid although it was supposed to be a free trial for 30 days.
Patrick O. O
as an insurance broker I encounter too often forms from insurance companies that are not editable yet. Which makes preparing them for our clients some stupid and unncessary extra work (and for the clients to finish them). PDFfiller is a great tool to help with that in q fast and easy way.
Desktop Apps
Get a powerful PDF editor for your Mac or Windows PC
Install the desktop app to quickly edit PDFs, create fillable forms, and securely store your documents in the cloud.
Mobile Apps
Edit and manage PDFs from anywhere using your iOS or Android device
Install our mobile app and edit PDFs using an award-winning toolkit wherever you go.
Get a PDF editor in your Google Chrome browser
Install the pdfFiller extension for Google Chrome to fill out and edit PDFs straight from search results.

pdfFiller scores top ratings in multiple categories on G2

For pdfFiller’s FAQs

Below is a list of the most common customer questions. If you can’t find an answer to your question, please don’t hesitate to reach out to us.
Yes, all the documents you have in your pdfFiller account can be password-protected with the help of the Encrypted Folder.
The Encrypted Folder is a place to lock PDF documents with an additional layer of security. To access the folder and its contents, you will need to enter the password.
To activate, click Encrypted Folder in the Documents section, enter your mobile phone number, and then enter the activation code you receive via text message. After that, create and confirm your unique password.
If you did not receive an activation code, click “Send the code again” at the bottom of the activation popup, and make sure your mobile phone number is entered correctly. Please keep in mind that the text message may take a few minutes to arrive.
To reset your Encrypted Folder password, click “Forgot your password?” at the bottom of the Encrypted Folder login popup. You'll be returned to the authentication screen and asked to enter your mobile phone number again.
eSignature workflows made easy
Sign, send for signature, and track documents in real-time with signNow.