Stay mobile Lock PDF Files on Smartphone 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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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:
It is a time saving tool. There are times that I am faced with having to annotate, update or have a document signed immidiately I turn to PDF Filler with confidence...
Leonides V
2018-04-30
For doing signatures electronically this is fantastic! As a transplant patient, it's not a good idea to leave the house during this corona virus time, so this work as a great method to get this done.
Dave D
2020-04-05
What do you like best?
Ability to edit then fax. Simple to find documents that I have scanned to PDF format.
What do you dislike?
Could have a better fax cover sheet, it should be more graphic
Recommendations to others considering the product:
Just do it. Will save you time.
What problems are you solving with the product? What benefits have you realized?
Saves time
Patrick McCarthy
2019-08-15
Thanks to this app I am able to edit my work pdfs Thanks to this app I am able to edit my PDFs so easily. This helps a lot in my corporate life. I do not know what I would do without it. my favorite feature is the one that allows me to edit the order of the pages, and merge PDFs together.
Jaclyn Ramos
2024-09-12
Great Customer Service! I had a billing/subscription issue and it was fixed in less than one minute. I had Sam as a support and he was very pleasant to work with. Thank you for having great customer service.
Brandi Foote
2023-05-26
Totally satisfied with both product and customer service. I recently found out I was paying for two separate accts., and I contacted PDFFiller and they were able to straighten it out for me, I am very satisfied with both their product, and their customer service.
Joan Kraskey
2021-02-23
Definitely recommend!! Pdf filler was easy to use and it has endless things you can fill. I have not come across anything else like it. The team and customer service is top notch, quick, friendly and helpful!
Leah Lewis
2020-10-25
I Will Recomended because I had to edit… I Will Recomended because I had to edit my document multiple times since their was mis information I put. So is could you can edit it again and again.
Francisco Molina
2020-05-11
Being a young 70+ Being a young 70+, I initially had some issues but managed to overcome them relatively easily, and I am very satisfied with the product, and the results I have achieved..
John Jefferson
2020-04-18

Lock PDF Files on Smartphone trouble-free

Are you fed up with having to carry a laptop around anywhere you goonly to be able to open and sign that crucial document? Maybe you have lost clients because of an inability to Lock PDF Files on your Smartphone? Here at pdfFiller, we offer you a solution that frees you from relying on a software with no cloud storage support, to be able to work from any device, anywhere.

pdfFiller is a web-based PDF editor with advanced functionality for smartphone users and allows you to Lock PDF Files on Smartphone just the same way it does on your laptop. You're free to choose how you work. Utilize the web app, desktop application, or the mobile app. Check out the list below to learn the best features available on mobile:

01
Add new objects. Insert texts, crosses, checkmarks, images, text boxes, or simply draw on a document
02
Convert files. Save your records as files in PDF, Word, Excel, or PowerPoint formats
03
eSign documents. Create a legally-binding signature and send a form for signing in seconds
04
Cover sensitive data. Use the Blackout option to hide delicate information that shouldn’t be spread to third parties
05
Export content. Share samples via links, emails, messengers, or fax
06
Request additional authentication. Ask recipients to confirm their identity by taking a photo or linking social media profiles
07
Simplify collaboration. Highlight content or add comments for your colleagues

Manage documents like a professional. Do business right from your browser or install the application. Despite of your choice, all your data is secured with the most up-to-date encryption features, so that nobody could get unwanted access to your data. Don't wait, make the most of professional document management now!

Stay Mobile: Lock PDF Files on Your Smartphone

Introducing the Stay Mobile feature that allows you to lock PDF files directly on your smartphone. This tool focuses on enhancing the security of your important documents and ensuring that your sensitive information remains private.

Key Features

Easy locking mechanism to secure PDF files
User-friendly interface for quick access
Compatible with various smartphone models
Customizable password options for enhanced security
Immediate notifications for unauthorized access attempts

Use Cases and Benefits

Protect personal financial documents from unauthorized viewing during travels
Lock work-related PDF files to maintain confidentiality while collaborating
Secure sensitive medical records to comply with privacy regulations
Prevent accidental sharing of important legal documents or contracts

Stay Mobile effectively addresses your need for document security. By locking your PDF files, you gain peace of mind knowing that only you have access to your important information. This feature empowers you to manage your documents confidently, whether at home, at work, or on the go.

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
How to set a password to protect PDFs on Android. Begin by navigating to the password protection page on your preferred browser. Click the Select A File button to choose and upload your PDF. Create a password and enter the password, then retype it to confirm.
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.
How to set a password to protect PDFs on Android. Begin by navigating to the password protection page on your preferred browser. Click the Select A File button to choose and upload your PDF. Create a password and enter the password, then retype it to confirm.
How To Lock PDF With Password Open Files and tap on Browse (bottom-right in the footer menu). Go for On My iPhone. ... Tap Downloads or any other available folder that stores the PDF that you want to protect. Tap on the document's thumbnail to open it. Use the Share icon. Select Lock PDF. Type a Password and verify it.

Video instructions on how to Lock PDF Files on Smartphone

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