Unlock PDF and Lock PDF for Windows For Free

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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
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

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:
So far it has met my needs and wants. While there has been a struggle with removing the Electronic disclosure page, their technicians and chat support are quick to respond.
Kory H
2018-05-29
What do you like best?
PDFfiller was easy to use and the electronic signature feature was great. When I had a small issue customer service responded quickly and solved the problem right away.
What do you dislike?
I have nothing I really disliked, I had no problems downloading the document, filling in the required fields and electronically signing them.
What problems are you solving with the product? What benefits have you realized?
I was able to fill out and electronically sign a health certificate quickly and easily.
User in Veterinary
2019-07-20
PDFfiller Review In my job, we send out contracts and W-9 forms to meeting attendees all the time. PDFfiller is great because attendees can quickly "sign" and send their documents right back, without having to print the forms, sign them manually, and then deal with faxing/scanning/or taking a picture to send it back. I like how seamless PDFfiller is. Sometimes, the actual signature does not populate, and all that shows is a stamp saying the person signed it. However, with things like contracts and W-9s, we need an actual signature, whether it be manual or digital.
Dana K.
2019-07-23
i find it easy to use. but i was wondering if there's a way to order a 3page document that when i wright on the first it goes through the other 2 so i can have a copy for the customer and 2 for the ofice.
Kevin B
2023-12-11
i highly recommend this online Editing… i highly recommend this online Editing platform, it has the best editing tools and cheap. Customer support was ? . Had a problem with my Visa card but An agent called"Alex" was helpful , he solved my issue in a kind and professional way, thumbs up
Mr. C D The voice
2022-06-01
Have not been able to successfully append a document more than 5 pages. That process does not appear to be very user friendly to figure out. Would love some guidance on how to do specific things with this program now that I have purchased it for a year!
Gretchen L
2022-01-31
I've been a customer of ********************** for almost 2 years now. The program has completely upped my game from writing business letters, filling out pdfs, faxing important documents - there is no limit to what you can do with a program like PDFFiller. But, what really pulled me in, other than the superb professional look and quality that PDFFiller gives my correspondence, was the help I received when I needed it. For example, I needed help with merging two documents that I needed to fax. I received help via the Chat Box within seconds of asking for assistance. It's like having your own IT team 24 hours a day! I also just found out that outbound faxes are included in the price and, if you want your own inbound fax number, $20.00 a month gets you your own fax number! The list goes on and on. I can't say enough about PDFFiller! Complete professionalism, confidentiality, and customer oriented. Try **********************! You will not be disappointed!
Veron B
2021-08-11
Appreciate their support and trustworthy I used their services and subscribed annually by mistake but when I asked to cancel the order and refund amount, they immediately processed the refund. I really appreciate.
Jabaran Singh
2021-01-02
Just want to let you know that the… Just want to let you know that the people that work for PDFiller are great people. In these hard time we are going thru I had to cancel my account and request refund. They said they could help, they did and I received a notification via email the second day after my request back to PayPal. THANK - YOU
jeff hertel
2020-04-27

Unlock PDF and Lock PDF for Windows

Managing PDF files can be challenging, especially when it comes to securing your sensitive documents or needing access to locked files. With our Unlock PDF and Lock PDF feature for Windows, you can easily control who accesses your files and maintain your privacy. This tool allows you to quickly unlock PDFs for editing or lock PDFs with passwords to keep your data safe.

Key Features

Easily unlock password-protected PDFs for editing and printing
Securely lock PDFs with user-defined passwords
User-friendly interface for quick operations
Batch processing to save time on multiple files
Support for various PDF formats

Potential Use Cases and Benefits

Unlocking PDF files to make changes for work or personal projects
Locking confidential documents before sharing to prevent unauthorized access
Batch unlocking or locking multiple PDFs for efficiency
Enhancing document security for sensitive information such as contracts or reports
Facilitating collaboration while maintaining control over document access

With the Unlock PDF and Lock PDF feature, you address common issues such as restricted editing and data breaches. You can now confidently manage your documents, ensuring both accessibility and security. Whether you are a professional working with important files or an individual wanting to protect personal information, this tool meets your needs effectively.

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
Click CHOOSE FILE. It's a green button on the right side of the page. Select your PDF file. In the window that opens, go to the location in which your PDF is stored, then click the PDF once to select it. Click Open. Enter the user password. Click UNLOCK. Click VIEW & DOWNLOAD IN BROWSER.
Drag and drop your document in the PDF Password Remover. Confirm that you have the right to the file and click 'Unlock PDF!'. The decryption process should start right away. Modify your PDF further, or click 'Download File' to save the unlocked PDF.
Go to Finder > locate your file and double-click it to open it in Preview. Enter the password to unlock the PDF document. Once your PDF file is unlocked, click on File > Export as PDF > enter the file name and set its destination > hit Save. That's all, the new PDF file you just saved will no longer require a password.

#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