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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:
amazing way for buisness startup helps out so much . no need to send mail everything is just through your computer. saves you time a lot of time. i highly recomment this.
Ketian
2014-05-01
I like the ease of use. I do think the help system needs and upgrade. Should have a searchable index. It is hard to find topics. I am an experienced software guy and just want to find out how to do thinks.
david o
2017-06-04
What do you like best?
I like that it's pretty intuitive and easy to use.
What do you dislike?
Loading times are a little long sometimes.
What problems are you solving with the product? What benefits have you realized?
Processing of any kind of documents.
Carolien Gilbert
2019-01-28
What do you like best?
Easy to use, and safe for signatures, recommend this product
What do you dislike?
Love this product, there has not been any issues
What problems are you solving with the product? What benefits have you realized?
Electronic signatures on HIPPA related forms
Administrator in Health, Wellness and Fitness
2019-01-28
What do you like best?
I like being able to edit and/or fill-in .PDF documents. I also like that I can retrieve documents that I have previously worked on.
What do you dislike?
I'd like to be able to change the font in the text option, as it doesn't always look right if mismatched.
Recommendations to others considering the product:
I'm not sure how I first heard of PDF FILLER, but am I ever glad that I found it. My advice would be to try it out and see if it suits your needs. I like many of its features, especially the left pane that shows the document pages, and the ability to select only those that you want to include in a print or save maneuver.
What problems are you solving with the product? What benefits have you realized?
One use that I have for the program is for one of our telecommuter workers - so that she can enter details on employee time cards, and it looks better than handwriting in notes. Uploading the documents she needs is a breeze, and the program alerts me to activity, for example, when she emails the documents to us for distribution.
Paula Yankauskas
2019-05-28
What do you like best?
It can edit and sigh.We can use it as daily works.
What do you dislike?
It can not merge more than two pages. If we have 2 or more pages to merge, it failed.
What problems are you solving with the product? What benefits have you realized?
None
User in Defense & Space
2019-08-15
Great Program with pretty much all you need This is a great program and I'm able to do what I want to so far. The only reason I did not give 5 stars is I think it is a little expensive for the service and it's not really user friendly I would think if you were not pretty computer literate. Outside of those two things...IT GREAT!
Les Spradlin
2020-01-22
Kara is awesome. I had a great experience with Kara at Technical Support. She took control of my screen via Zoom and resolved my problem. I can't say enough good things about her.
Robert Hanelt
2024-02-28
pdfFiller’s customer service pdfFiller’s customer service is exceptionally attentive to their customers. Their fast and prompt reply makes them a step above the rest.
Margaret Dixon
2025-04-05

Easy Lock and Unlock PDF online and more, with pdfFiller

If you have ever experienced any issues with trying to Lock and Unlock PDF using the online solutions only, you're not alone. Although those are very common features which most tools provide separately, hardly any of them provide the full compatibility to perform both together. By using pdfFiller, you can start to get your time back and complete work faster.

pdfFiller is a professional, online PDF editing tool that actually works from the cloud. Just open a web browser, log in to your account, opt for a sample, and Lock and Unlock PDF in minutes. With our service, the process of editing files in PDF is simple, seamless even. An advanced set of features enables you to do what you need and much more. Here are the most helpful features you can use within your documents on pdfFiller:

01
Electronic signatures. Certify forms or agreements right from your device
02
Smart export. Send a file by email or fax, transfer it to the cloud, or simply download a sample in one of the available formats: PDF, DOCX, XLSX, PPTX, and JPG
03
Templates. Generate reusable forms and fill them out as many times as you want
04
Fillable fields. Insert them to let customers to enter data
05
Layout management. Rotate, delete, or add new pages to accomplish your goals
06
Watermarks. Protect your content by placing your logo or name on pages

pdfFiller is not only suitable for Lock and Unlock PDF but keeps your data protected. Your data is stored and transferred among the servers firmly following the GDPR standards, and encrypted. Thanks to the two-factor authorization, there's no need to go another day with your data exposed to unauthorized third parties.

Value your time and get started with pdfFiller for a more streamlined approach to your document management.

Lock and Unlock PDF Feature

Protecting your PDF files has never been easier. Our Lock and Unlock PDF feature provides a simple way to secure your documents. With just a few clicks, you can lock sensitive files and control who can access them. When you need to share a document, unlock it quickly and easily, maintaining the flexibility you need.

Key Features

Secure your PDF files with strong encryption
Easily lock and unlock PDFs with user-friendly controls
Customize permissions for individual users
Protect against unauthorized editing, copying, and printing
Maintain document integrity during the sharing process

Potential Use Cases and Benefits

Share finance reports while keeping sensitive information secure
Send contracts that only authorized parties can view or edit
Protect personal documents when sharing through email or cloud storage
Secure educational materials for students with access restrictions
Allow collaboration without risking information leaks

This feature solves your problem of document security. You can lock confidential PDFs to prevent unauthorized access. When you need to share information, simply unlock the document for authorized users. With this feature, you gain control, ensuring that your important files remain protected throughout their lifecycle.

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 Use the Lock and Unlock PDF Feature in pdfFiller

The Lock and Unlock PDF feature in pdfFiller allows you to secure your PDF documents and control who can access and edit them. Follow these simple steps to use this feature:

01
Log in to your pdfFiller account. If you don't have an account, you can sign up for free.
02
Upload the PDF document you want to lock or unlock. You can do this by clicking on the 'Upload' button on the main dashboard.
03
Once the document is uploaded, click on the 'Lock' or 'Unlock' button, depending on what you want to do with the PDF.
04
If you choose to lock the PDF, you will be prompted to set a password. Make sure to choose a strong password that is not easily guessable. This will ensure the security of your document.
05
After setting the password, click on the 'Lock' button to apply the lock to the PDF. Now, only users with the password will be able to access and edit the document.
06
If you want to unlock the PDF, simply click on the 'Unlock' button. You will be prompted to enter the password that was set earlier. Once the correct password is entered, the PDF will be unlocked and can be accessed and edited by anyone.
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After locking or unlocking the PDF, you can download the secured document to your computer or share it with others via email or a link.
08
If you need to make any changes to the locked PDF, you can unlock it using the same password and then re-lock it after making the necessary edits.
09
Remember to keep your password secure and share it only with trusted individuals. This will help protect the confidentiality of your locked PDF documents.

By following these steps, you can easily lock and unlock PDF documents using the pdfFiller Lock and Unlock PDF feature. Enjoy the added security and control over your important files!

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 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.
Most of the reasons why you can't edit PDF files have to do with the software you are using. If you use the wrong or substandard software, you may be unable to edit a PDF document. You therefore need the best software in the business and that can only be PDF element.

#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