Lock PDF and Encrypt PDF for Computer 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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Discover the simplicity of processing PDFs online

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Upload your document in seconds
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Fill out, edit, or eSign your PDF hassle-free
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Download, export, or share your edited file instantly
Top-rated PDF software recognized for its ease of use, powerful features, and impeccable support
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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:
This is my first experience with PDFiller.....so far, it is good. However, I do not like that there is not a contact # to speak to someone in customer support. .
Marsha Z
2016-10-17
I was needing a temporary custody order for my grandchildren. I found exactly what I needed on PDFfiller and it made for a great experience. I will be using this product as needed in the care and control of my Grandkids life.
Patricia F
2017-08-04
Honestly- it is not straigth forward tool- you need to spend time and learn how to use it so it is not exceptionally user friendly. I found SignNow very complex!
ana
2019-05-03
Good utility but service was even better I used this a couple of times. It was good, but other than that specific task I had no use of it, I let the trial run out and a week after I was charged and they were gracious enough to give me a refund and cancel the subscription with no fuss. Greatly appreciated.
Soni KS
2020-03-25
PDFfiller for Real Estate Overall this software has made is easier to get paperwork to my clients and have the fill in and sign online. This software is great for my business. I can easily send over pdf files and they can fill them our and sign all online. It is convenient and easy to use. This software performs well and there is nothing negative to report. It is a great way for clients to file out paperwork and sent back to me when they are finished.
Jessica H.
2020-02-04
Perfect for my needs! I found it super easy to use - was looking for a product like this and it really met my needs! I have used it for basic tasks and it works great. I feel like if I ever want to do more creative documents that I will need more training. This feature is a bit complicated to me.
Christine D.
2018-05-18
I have tried various programs to change… I have tried various programs to change PDF's, and I find this one the easiest to use. It is much more intuitive than some of the others.
Brenda
2021-10-20
AWESOME TOOL! I must admit, I ALWAYS find myself coming back to pdffiller.com when in need of form completion and even creation! DEPENDABLE TOOL! Thank you for EXISTING pdffiler!
Charisse C
2021-09-25
It is cumbersome to upload every document, fill it out, then download it. I wish there was a free program that let you fill out and sign pdf documents directly
Lori K
2020-06-19

Lock PDF and Encrypt PDF for Computer

Protect your sensitive documents with our Lock PDF and Encrypt PDF feature for computers. This tool gives you peace of mind by ensuring that only authorized users can access your files. You handle confidential information daily; safeguarding it is essential for your privacy and security.

Key Features

Securely lock PDF files to prevent unauthorized access
Encrypt PDF documents to add an extra layer of protection
Simple and user-friendly interface for easy management
Support for bulk processing of multiple PDF files
Customizable password settings for enhanced security

Use Cases and Benefits

Ideal for businesses handling sensitive information
Perfect for freelancers sharing creative work securely
Useful for educators who protect student data
Excellent for anyone wanting to keep personal documents safe
Facilitates secure document sharing without compromising confidentiality

This feature effectively addresses your need for document security. By locking and encrypting your PDFs, you eliminate the risk of unauthorized access to your files. Whether you are a business professional or an individual, you can rest assured that your important documents remain confidential and secure.

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!

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?
Contact Support
Open the PDF and choose Tools > Protection > Encrypt > Encrypt with Password 6. If you receive a prompt, click Yes to change the security. 7. Select Require A Password To Open The Document, then type the password in the corresponding field.

How to Lock PDF and Encrypt PDF for Computer - video instructions

#1 usability according to G2

Try the PDF solution that respects your time.
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