Lock a PDF File Made Simple 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
Note: Integration described on this webpage may temporarily not be available.
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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:
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
What do you like best?
Ability to edit, find new documents, esignatures
What do you dislike?
no complaints, nothing I can thing of at this time
Recommendations to others considering the product:
none at this time
What problems are you solving with the product? What benefits have you realized?
Getting properly signed documents
Jane Parsons
2018-01-02
What do you like best?
I can edit PDF files that I use often with ease.
What do you dislike?
I still can not figure out how to save as in the pdf filler to go back and edit the same exact file.
What problems are you solving with the product? What benefits have you realized?
I am saving time which is helping me save money.
Darrel Hayes
2019-01-29
It opens up pretty slow, and everytime I open a document the zoom is set to 134% and I don't know how to set it to 100% other than that the pdf filler is easier than others I've used and the other features work good.
Kristen
2024-02-20
Easy to use. I would like a feature to more easily type in info on blanks on pdfs. Text boxes are clumsy and it is easier to just handwrite the date.
John B
2024-01-23
So far it has been the go-too Application for filling out and converting PDF documents to word. It has helped me greatly in preparing forms for my job.
Andre M
2023-03-01
Outstanding customer service, communication and efficiency!! I highly recommend. They are one of the best, if the THE best company I've ever dealt with!
Kim M
2022-02-02
I highly recommend if you just need to… I highly recommend if you just need to do one project I won't comment on the long term part but I signed up for free trial made edits on a 24 page PDF I received via email and to return via email filled out. I was ripped off by two other pdf companies before I tried this one. both times I did 24 pages of work only for it to paywall it and never recover it even after taking my money.THANK YOU PDFFILLER
John F.
2021-06-10
Great Product Great Product. For years I've sought out a decent option for filling forms and signing them, as an enduser, not a provider of the document. This was very easy to do. I needed my husband's signature on it and the fact that I was able to send him a notification and had him sign from his phone REALLY made my day. AWESOME!!!
emmiejolopez
2020-08-24

How to Lock a PDF File Online

Even if someone without your permission tries to open your document, they won’t be able to access the data. Assure that nothing will happen to your document as long as you follow the steps provided above. You're still able to edit the file and send it to others.

Lock a PDF File Feature

Protect your sensitive documents with the Lock a PDF File feature. This tool allows you to secure your PDF files easily, ensuring that only authorized users can access them. With this feature, you maintain control over your important information.

Key Features

Password protection for your PDF files
User-friendly interface for quick setup
Compatibility with all PDF viewers
Customizable security settings for different needs
Option to remove restrictions if needed

Use Cases and Benefits

Ideal for businesses sharing sensitive documents with clients
Useful for students submitting assignments securely
Effective for freelancers protecting client proposals
Perfect for anyone wanting privacy for personal information

The Lock a PDF File feature addresses your need for document security. By using this feature, you can prevent unauthorized access to your files, which helps reduce the risk of data breaches and maintains your peace of mind.

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 Lock a PDF File Made Simple

Locking a PDF file is a simple and effective way to protect your sensitive information. With pdfFiller's Lock a PDF File Made Simple feature, you can easily secure your PDF documents and prevent unauthorized access. Follow these steps to lock a PDF file:

01
Log in to your pdfFiller account. If you don't have an account, sign up for free.
02
Upload the PDF file you want to lock. You can either drag and drop the file or click on the 'Upload' button.
03
Once the file is uploaded, click on the 'Lock' button in the toolbar.
04
A pop-up window will appear. Here, you can set a password for your PDF file. Make sure to choose a strong password that is not easily guessable.
05
After setting the password, click on the 'Lock' button to secure your PDF file.
06
Your locked PDF file is now ready. You can download it or share it securely with others.

By following these simple steps, you can easily lock your PDF files and ensure that only authorized individuals can access them. Keep your sensitive information safe and secure with pdfFiller's Lock a PDF File Made Simple feature.

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
Drag and drop files to the workspace or browse for files by clicking on Add File(s). Click on the drop-down arrow and choose to Scanned PDF. Set destination folder for the PDF to create and press Start: to start the conversion.

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Try the PDF solution that respects your time.
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