Lock PDF and Edit PDF for Windows 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 Dec 12, 2023

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:
Extremely convenient and VERY user friendly. This site made a very daunting situation very tolerable. Love the free week and the on-going rate of $6.00/mo.
Julie W
2018-02-10
Great pdf editing software PDF Filler is an awesome piece of software. It is so good being able to edit docs online and save them without having to worry about retyping information because the pdf provided was not able to be edited There is no version history which means if you make changes to the pdf you can backtrack to an earlier version unless it was saved separately
Travis K.
2019-05-15
The initial setup went smoothly. Once I figured how to save the documents with the correct name after duplicating the original form, I had no problems.
Anthony J
2024-06-13
First review It works better than most others I've tried.It is sometimes a bit difficult to navigate as I dont use it too often. I dii have an issue with support, but they did finally undertand my query and they fixed it up, with a very good explanation.
John
2023-07-16
Took me a minute to get the hang of… Took me a minute to get the hang of it... after that no problem. Not sure if there is a tutorial for typing in text and moving the text where you need it...
Rachel
2021-08-14
Impressive customer service (LIVE support) I did not realise that my free trial expired until I got a charge for the month of December. I contacted 'live support' (which popped in in 20 sec) and Thomas was the most helpful I've ever experienced in customer service. He found out I had 2 accounts and when I explained to him that I actually only used the service once, he promptly offered me refund. I did not even expect one because I honestly thought this is another website that makes money by offering a trial and then charge you once trial is finished (which many of us would forget and only cancel when it is too late). But no, refund is already action, and he also cancelled my account as per my request with no fuss! Thomas, thanks for being extremely prompt and helpful! I will surely use this service next time. Thank you!
customer
2020-12-02
I had an issue with accessing a form… I had an issue with accessing a form shared by a colleague. I wrote to the 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 Wickramasekara
2020-11-02
What do you like best? It’s very user friendly and I can fine forms easily What do you dislike? I don’t dislike any thing , makes printing my insurance certificates a breeze What problems are you solving with the product? What benefits have you realized? Making insurance certificates
Administrator in Insurance
2020-08-30
This is an excellent product/service that was very useful to me, especially because I have a ********** and can't install windows based pdf editing software. After the trial period, I had a family emergency that caused me to forget to cancel my trial (I love pdf filler but planned to subscribe later when I will need it more) so I was auto charged for the subscription once my trial ended. I contacted support to explain what happened and they responded and resolved my issue within just a few minutes. They were prompt, professional, and understanding. I feel great about the service and customer support that I recieved and plan to subscribe to pdf filler in the near future. I wild gladly recommend pdf filler to anyone who wants a great way to edit pdf files with the confidence of working with a company that has excellent customer service.
Sharon L
2020-04-29

Lock PDF and Edit PDF for Windows

Manage your PDFs easily with the Lock PDF and Edit PDF feature for Windows. This tool allows you to safeguard your documents while also providing the flexibility to make necessary changes. Whether for personal or professional use, this feature meets your needs effectively.

Key Features

Password protection for secure access
Editing capabilities for text and images
Merge, split, and resize PDF files
Add annotations, comments, and stamps
User-friendly interface for easy navigation

Potential Use Cases and Benefits

Secure sensitive documents such as contracts and personal data
Prepare presentations or reports by editing existing PDFs
Collaborate with teams by sharing annotated files
Create professional-looking documents through merging and formatting
Easily access and modify project files without starting from scratch

This feature solves your problem by allowing you to maintain control over your documents while providing the tools to edit them as needed. You can prevent unauthorized access and ensure that your changes are reflected instantly. Simplify your document management process and enhance your productivity with this powerful PDF solution.

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
To get started, go to this converter. Drag the PDF file in, click 'Convert entire page' and then 'Choose option'. On the following page, click 'to PDF' in the lower right-hand corner. Click 'Create PDF Now', wait and download your locked PDF file.
Open the PDF and choose Tools > Protect > Encrypt > Encrypt with Password. If you receive a prompt, click Yes to change the security. Select Require a Password to Open the Document, then type the password in the corresponding field.

Video Review on How to Lock PDF and Edit PDF for Windows

#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