It only takes a few clicks to Lock PDF Files in Android 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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Every PDF tool you need to get documents done paper-free
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.
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.
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.
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.
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.
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
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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 am happy with PDFfiller for the most part. It is a very good editor that makes a normal document look sophisticated. My only complaint is the price. 15$ a month for this? I mean it is a good editor, but 175$ a year is to much for me. Overall, it is a great app for editing with a great package of fun.
2018-08-14
I had such hassle trying to find…
I had such hassle trying to find something to edit my work PDF timesheets, then I came across PDFfiller & it solved all my problem, so easy to use & takes a fraction of the time to fill in my timesheets & email them back to work. I would recommend this product to anyone
2019-02-19
Great PDF
Very easy to use! Updating documents quickly is really helpful and saves me time in my practice. It's great to have the app in case I am not in my office when a change is needed.
There are a few glitches. For example, in order to save a document you have to remember to duplicate it. The emailing feature can be glitchy at times.
2018-12-31
As a real estate broker, I have used the PDF Filler to fill out contracts and personal forms.
Ease of use. I was able to figure out how the software worked and used it within 15 minutes. This was great because I needed it as soon as I could get it working!
I honestly believe the software can be figured out easily by the vast majority of people. If not, they should be able to get assistance easily.
2017-11-24
It is an awesome program... I do so little on it I have to start over every year trying to figure it out... Thanks so much for your help.. I was lost ... You guys are the best...
2022-02-09
I LOVE IT!!!
I LOVE IT!!!! this tool is so awesome and user friendly. You can't get any better than this. and it shows it is only $8.00 a month, so cheap. :)
2021-03-05
Great software
Great software! Very easy to use and does just about everything you would want a PDF editor to do. The only issue I had was when replacing text the text box deleted the line the text was sitting on and I ended up with a break in the line. Other than that I highly recommend!
2020-12-04
Very satisfying!!! It has been a very helpful tool to modify and to fill up forms related to my work. The only thing I regret is not have been subscribed earlier.
2020-05-10
I'm happy with the use of the forms, however it showed a monthy price, so I was suprised when I was charged for the entire year up front. I only needed the product for a couple tax documents.
2025-03-26
Lock PDF Files in Android: Secure Your Important Documents
The Lock PDF Files feature for Android offers a simple and effective way to protect your sensitive documents. With just a few taps, you can ensure that your PDFs remain confidential and accessible only to you.
Key Features
Password protection for all your PDFs
Easy unlocking process for authorized users
User-friendly interface for quick access
No need for an internet connection, works offline
Supports various PDF formats
Potential Use Cases and Benefits
Secure personal documents like bank statements and tax forms
Protect business contracts and proposals from unauthorized access
Share sensitive information with clients while keeping it private
Safeguard academic papers and research data
Prevent data loss and unauthorized editing of important files
By locking your PDF files, you take control of your information. This feature helps you avoid unauthorized access, which can lead to data theft or leakage. With the ability to easily lock and unlock your documents, you can confidently share your files, knowing they are secure. Start using this feature today and enhance the security of your important PDFs.
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
Can you lock PDF files?
Open the PDF and choose Tools > Protection > Encrypt > Encrypt with Password 6. If you receive a prompt, click Yes to change the security. 7. Select Require A Password To Open The Document, then type the password in the corresponding field.
Can you lock a PDF from opening?
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.
How do you create a secure PDF?
Click the Select a file button above or drag and drop a PDF into the drop zone. Enter a password, then retype it to confirm the password. Click Set password. Download the password protected PDF document or sign in to share it.
Video instructions on how to Lock PDF Files on Android
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