Password Protect and Secure PDF File for free

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Up to 100 MB for PDF and up to 25 MB for DOC, DOCX, RTF, PPT, PPTX, JPEG, PNG, JFIF, XLS, XLSX or TXT
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Last updated on Sep 20, 2025

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Users Most Likely To Recommend - Summer 2025
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Every PDF tool you need to get documents
done paper-free

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Create & edit PDFs

Generate new PDFs from scratch or transform existing documents into reusable templates. Type anywhere on a PDF, rewrite original PDF content, insert images or graphics, redact sensitive details, and highlight important information using an intuitive online editor.
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Fill out & sign PDF forms

Say goodbye to error-prone manual hassles. Complete any PDF document electronically – even while on the go. Pre-fill multiple PDFs simultaneously or extract responses from completed forms with ease.
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Organize & convert PDFs

Add, remove, or rearrange pages inside your PDFs in seconds. Create new documents by merging or splitting PDFs. Instantly convert edited files to various formats when you download or export them.
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Collect data and approvals

Transform static documents into interactive fillable forms by dragging and dropping various types of fillable fields on your PDFs. Publish these forms on websites or share them via a direct link to capture data, collect signatures, and request payments.
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Export documents with ease

Share, email, print, fax, or download edited documents in just a few clicks. Quickly export and import documents from popular cloud storage services like Google Drive, Box, and Dropbox.
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Store documents safely

Store an unlimited number of documents and templates securely in the cloud and access them from any location or device. Add an extra level of protection to documents by locking them with a password, placing them in encrypted folders, or requesting user authentication.

Customer trust by the numbers

64M+
users worldwide
4.6/5
average user rating
4M
PDFs edited per month
9 min
average to create and edit a PDF
Join 64+ million people using paperless workflows to drive productivity and cut costs

Why choose our PDF solution?

Cloud-native PDF editor

Access powerful PDF tools, as well as your documents and templates, from anywhere. No installation needed.

Top-rated for ease of use

Create, edit, and fill out PDF documents faster with an intuitive UI that only takes minutes to master.

Industry-leading customer service

Enjoy peace of mind with an award-winning customer support team always within reach.

What our customers say about pdfFiller

See for yourself by reading reviews on the most popular resources:
I have found the PDF filler to be very useful in completing some legal documentation needed. It was easy to use and the final results were professional.
Anne M
2017-05-01
It is convenient, ensures legibility and a professional appearance, and is easy to use. I have used it only for basic functions - i.e. filling in blank lines. I still need to explore what else it can do.
Anonymous Customer
2017-12-10
I love it but when I was trying to edit document I could only click and erase some fields. I had to use the eraser for the rest. But overall great product.
Anonymous Customer
2018-11-27
What do you like best?
I can open any file anywhere, edit and email or fax without having to print anything. I use this feature all the time
What do you dislike?
A couple of the functions are a bit clunky
What problems are you solving with the product? What benefits have you realized?
I have terrible handwriting and I need to print on PDFs constantly.
Administrator in Insurance
2019-01-30
With PDF Filler, you can create and organize documents in one place. The only thing they need is an invoice based on the work order info. Apart from that, it's great. Definitely recommend PDF Filler. This US Legal Forms feature helps a lot. PDF Filler also has reasonable prices.
Angie
2023-04-16
I used the free trial to compile rent due ledgers for the ************** requirement. I did not cancel on time and was charged $180 dollars. I reached out to support and ****** returned my email within minutes. I provided my information to customer service specialist ****** and he fixed the problem. There wasn't any back and forth emails. It was straight to the point. Thank you ****** for being quick and professional.
Melissa H
2022-04-05
PDFfiller I am happy with the software and it helps me to speed up my paperwork and save my time. What I like most about PDFfiller is that it is very easy to fill out the form electronically. It fills out any blank space of the PDF form from the loaded document. No negative review on this software. The software is so easy and simple to use and I use it at work when I need it.
Tony M.
2020-11-27
I had an issue with accessing a form shared by a colleague. I wrote to the PDFfiller support team and received their response very swiftly. The instructions received via email were very clear and easy to follow. I was able to fix the issue within a very short time. I'm really impressed by the efficiency and quality of customer support.
Pubudinie W
2020-11-02
easy to use and there are a lot of options to have... easy to use and there are a lot of options to have things mailed, emailed, faxed, etc right with a click of a button and entering information. It does have a fee for this BUT it is SUPER convenient so honestly its a very small price to pay to not have to worry about all the extra work i would have to do myself.
anonymous V.
2020-05-20

Easy Password Protect and Secure PDF File and much more, with pdfFiller

If you have ever been fed up with using single-function programs where you are only capable of complete one manipulation at a time, we understand how you feel. Hours are wasted switching back and forth among multiple solutions. Try using pdfFiller to get things done sooner and speed up these processes.

pdfFiller is a professional, web-based PDF editing tool that actually works from the cloud. In order to Password Protect and Secure PDF File, you just need to open a web browser, log in, opt for a document template, and Password Protect and Secure PDF File in minutes. The process of editing files in PDF is simple, smooth actually. An advanced set of tools enables you to do what you need and even more. Here are the most helpful tools you can use within your documents on pdfFiller:

01
Templates. Generate reusable forms and fill them out as many times as you want
02
Electronic signatures. Certify agreements and contracts straight from your device
03
Fill out fields. Obtain the data from your recipients the smart way
04
Watermarks. Place your logo or business name on the document's pages to protect yourself from plagiarism
05
Extensive export. Send a document by email or fax, transfer it to the cloud, or download in one of the available formats: PDF, DOCX, XLSX, PPTX, and JPG
06
Page management. Rotate, delete, or add new pages

pdfFiller is not only convenient for Password Protect and Secure PDF File but keeps the data secure. Your data is stored and transferred among the servers firmly following the General Data Protection Regulation standards. Thanks to the two-factor authorization, you don't need to go another day with your data exposed to unauthorized third parties.

Value your time and get started with pdfFiller today for a streamlined approach to how you Password Protect and Secure PDF File.

Password Protect and Secure PDF File Feature

Securing your PDF files has never been easier. With our Password Protect and Secure PDF File feature, you can ensure your sensitive documents remain private and safe from unauthorized access. This feature gives you peace of mind while sharing or storing vital information.

Key Features

Easily set strong passwords to restrict access to your PDF files
Encrypt your documents for added security
User-friendly interface for quick setup
Compatibility with various PDF readers
Ability to customize permission settings for viewing, printing, and editing

Potential Use Cases and Benefits

Secure financial reports and sensitive business documents
Protect personal information such as medical records or legal documents
Share confidential files with clients or colleagues without risks
Comply with data protection regulations and enhance overall security stance

This feature is crafted to solve your security challenges. By allowing you to password protect and encrypt your PDFs, it ensures only authorized individuals have access to your sensitive information. With our solution, you can confidently share your documents, knowing they are well-guarded.

Get documents done
from anywhere

Create, edit, and share PDFs even on the go. The pdfFiller app equips you with every tool you need to manage documents on your mobile device. Try it now on iOS or Android!

How to Password Protect and Secure a PDF File with pdfFiller

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

01
Log in to your pdfFiller account. If you don't have an account yet, you can sign up for free.
02
Once you're logged in, click on the 'MyBox' tab at the top of the page.
03
Select the PDF file you want to password protect and secure from your MyBox folder.
04
After selecting the file, click on the 'Protect' button located at the top of the page.
05
A drop-down menu will appear. Click on the 'Password Protect' option.
06
Enter a strong and unique password in the provided field. Make sure to choose a password that is not easily guessable.
07
Confirm your password by entering it again in the 'Confirm Password' field.
08
Click on the 'Protect' button to apply the password protection to your PDF file.
09
Once the password protection is applied, you can download the secured PDF file to your computer or share it securely with others.
10
To open the password-protected PDF file, you or the recipient will need to enter the correct password.
11
Remember to keep your password safe and avoid sharing it with unauthorized individuals.

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

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.
What if I have more questions?
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Click the Select a file button above, or drag and drop a PDF into the drop zone. Enter a password, then retype it to confirm the password. Click Set password. Sign in to download or share your protected PDF.
Click the Select a file button above, or drag and drop a PDF into the drop zone. Enter a password, then retype it to confirm the password. Click Set password. Sign in to download or share your protected PDF.

#1 usability according to G2

Try the PDF solution that respects your time.
Users Most Likely To Recommend - Summer 2025
Grid Leader in Small-Business - Summer 2025
High Performer - Summer 2025
Regional Leader - Summer 2025
Easiest To Do Business With - Summer 2025
Best Meets Requirements- Summer 2025