Lock PDF and Password Protect PDF for Mobile Gratis

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Every PDF tool you need to get documents
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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.

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What our customers say about pdfFiller

See for yourself by reading reviews on the most popular resources:
I have found it useful to complete a myriad of forms required for our charity administration electronically - rather than having to print, complete, scan etc.
Chris M
2017-09-20
PDFfiller is a great program and easy to use. When you need to sign a document and email...and don't want to have to print, sign, scan and email...this is the program for you. Works great for the real estate agent.
Tom G
2018-10-18
Perfect for on the go! Time saver and so convenient to have this! You can access from everywhere It's very easy to log on away from your desk to edit and send a document for a signature. I'm a logistics manager and I'm always on the go and most of the time I get phone calls away from my desk so its handy to be able to pull this software up on my phone to send important documents - especially customs paperwork when zip need to Nothing! You can pretty much find any document form needed in their library to assist you with your needs. You can even edit the document if need be.
Verified Reviewer
2019-05-01
I looked through all of the court libraries, many online results, etc to find what I needed to represent myself in court against my ex to defend my parenting rights, and this was the only place a found the form I needed, that was writable and downloadable. I appreciate this so much in such an already stressful situation, thank you pdfFiller.
Michelle M
2024-08-05
Work and Study Budy Overall I love the app and all the features it offer! The benefits totally outweigh the cost. Amazing app! What I like most about the feature is I can use it both for work to fill out pdf files and for my personal studies where I can write notes, comment, add highlights and more to the file. What I least like about this is it can be a bit pricey to maintain especially if I were only a student. But good thing I am also using it for work so I can really maximize its use.
Llana Melissa S.
2023-02-16
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 really like it not just because of the amazing features but it was absolutely free and could allow me download my work without paying a dime, cheers to the entire team
ken
2021-11-15
best customer service I've experienced Software works good, had no problem at all. The customer service was top notch. They helped resolve my account problems within the first hour I sent out the form. Polite and efficient. The excellent service provided was the last and fith star.
ye
2021-10-21
Great application for anyone that constantly has to have documents filled and e-signed! Would recommend it for anyone in an HR or customer service role in a business.
Andrew D
2021-09-27

Lock PDF and Password Protect PDF for Mobile

Secure your documents with our Lock PDF and Password Protect PDF feature, designed for mobile users. This tool empowers you to manage your sensitive files easily. Now, you can share important documents with confidence, knowing that only authorized users can access them.

Key Features

Lock PDF files with a secure password
User-friendly interface for easy navigation
Compatible with various mobile devices
Fast encryption process for quick locking
Option to remove passwords when needed

Potential Use Cases and Benefits

Protect personal documents like tax files and legal contracts
Safeguard business proposals and presentations
Ensure privacy for sensitive information shared via email
Control access to creative works before publication
Enhance data security when sharing files online

With this feature, you can resolve the anxiety of unauthorized access to your files. By locking your PDFs with a strong password, you take control of your information. This solution not only protects your sensitive data but also helps you maintain your privacy. Say goodbye to worries and enjoy peace of mind as you handle important documents.

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.
One-click option to protect a PDF with a password Choose File > Protect Using Password. Alternatively, you can choose Tools > Protect > Protect Using Password. Select if you want to set the password for Viewing or Editing the PDF. Type and retype your password.
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.
Choose Tools > Protect > Encrypt > Remove Security. Remove Security: The options vary depending on the type of password security attached to the document. If the document has a Document Open password, click OK to remove it from the document.

How to Lock PDF and Password Protect PDF for Mobile - video instructions

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