Lock PDF and Prevent Printing PDF for Mobile 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:
This has been a great investment. Documents look polished and crisp and are easily distributed. Broad applications from real estate to submitting insurance claims. Loving it!
Gina M G
2014-05-19
I have used PDF filler for completing new hire paperwork and the service is amazing! It's user friendly, dependable, and the customer service is top notch!! Jonathan N. Nashville, TN
Jonathan N
2014-07-21
Once you get used to the typing sequences - it is the bomb!!! DITTO but at first it is extremely frustrating & if do not use it on a regular basis - you always recall the truly pain in the ----- re this aspect.
Linda M
2018-03-18
What do you like best?
I have been using pdf filler for approximately 2 years now - and I can't say enough good things about it. It's very easy to convert documents into a fillable format.
What do you dislike?
I can't think of anything - as the features I've currently used meets my expectations.
What problems are you solving with the product? What benefits have you realized?
It allows me to convert any document into a professional fillable document.
Jimmy Johnston
2019-02-25
Provided ease by timely consistence and effortless interface in preparing & modifying quality forms. Ease of use. From downloading to modifying. Short learning curve. Provided easy solution to modifying old forms by scanning/uploading and easy modification. From what little I used it to create new forms, more flexibility would have been nice for import and modifying images. But since I rarely used this program for creation I may not have explored the features properly.
Jason B.
2017-11-15
What do you like best? Editing, merging and marking-up PDF documents and particularly drawings (I am an architect) is easy to do on the program. Editing, deleting selected pages and merging are the most common features that I use, and this is easily done on pdfFiller. It would be helpful if the program has better ways to draw lines and circles, etc., as these are basic needs when marking-up drawings. These features need to be improved. What do you dislike? Drawing features are not user friendly and need to be improved. Highlighting, which is available on pdfFiller, can only be done in straight lines and not at an angle or in curved shapes. This needs to be improved. What problems is the product solving and how is that benefiting you? Editing and merging PDF documents, marking-up PDF drawings. These are my most critical needs for document review and pdfFiller allows me to do all of this easily.
Verified User in Construction
2022-11-01
So far I am really liking pdfFiller So far I am really liking pdfFiller. It's simple to use and has many tools at your finger tips that makes filling out paperwork even easier when you can't get ink for your printer, or you own your business where filling out important documents just looks much neater when done on computer than your own chicken scratch.
Zackary Davis
2021-07-31
What do you like best? It is user friendly, very easy to navigate and to find the features I need regularly such as text and erase What do you dislike? Nothing that stands out. Again I use it every day and it has greatly reduced time spent on admin work Recommendations to others considering the product: It's worth the investment What problems are you solving with the product? What benefits have you realized? I have many forms sent to me (employee evaluations, intern evaluations) that are in pdf and pdf filler has been an affordable way to turn those forms around quickly
Gary Thandi
2021-04-19
Very easy to use, only thing is learning for a beginner is how to save the files so that they are editable in Microsoft word, and the work of art is not all over the place in the word document, thanks a lot! 10 stars for the service!
sterling c
2025-04-08

Lock PDF and Prevent Printing PDF for Mobile

Protecting your sensitive documents is essential in today’s digital world. The Lock PDF and Prevent Printing PDF feature for mobile gives you the control you need to secure your important files. You can easily lock your PDFs, preventing unauthorized access and ensuring your data remains private.

Key Features

Lock PDF files with a password
Restrict printing options for documents
Compatible with various mobile devices
User-friendly interface for easy navigation
Fast processing for quick security measures

Potential Use Cases and Benefits

Protect confidential business documents during travel
Secure personal information stored in PDF form
Prevent unauthorized sharing of important files
Maintain control over the distribution of sensitive content
Enhance compliance with data protection regulations

This feature resolves your document security concerns. By locking and restricting printing of your PDFs, you prevent exposure to unauthorized access and maintain the integrity of your information. Adopting this solution allows you to work confidently, knowing your data is well-protected.

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
Start by downloading the app from Google Play. Next, open it > password protection > import the PDF from your device memory. If you don't see any directory, clear the app data and try again. Now, you'll see two password option owner password and user passwords.
The “Permissions” setting controls restrictions that can be placed on the PDF file. To prevent printing of a PDF file, uncheck the “Allow the document to be printed” option. You must always enter a master password when security options are enabled or when a user password is set.

#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