Secure PDF File and Password Protect PDF on Mobile
Discover how to easily secure PDF file and password protect PDF on mobile and make the most of your documents
Create secure and intuitive eSignature workflows on any device, track the status of documents right in your account, build online fillable forms – all within a single solution.

The best way to Secure PDF File and Password Protect PDF on Mobile
Are you feeling hard-pressed to find a trustworthy service for all your paperwork editing and signing needs, including the option to Secure PDF File and Password Protect PDF on Mobile? airSlate SignNow is created to make your document editing and completion process as frictionless as possible, no matter the difficulty. Our platform offers a rich selection of business-ready paperwork editing, signing and collaboration and organization options you’ll find intuitive enough to be equally suitable for beginners and pro users.
- Head to the airSlate SignNow homepage.
- Set up or log in to your existing account.
- Use one of the methods to add your document.
- Open your document in the editor.
- Try out the left and top toolbar and locate the option to Secure PDF File and Password Protect PDF on Mobile.
- Apply other features to optimize or organize your paperwork.
- Save the changes and download the file.
No matter what feature you leverage or the activity you carry out, airSlate SignNow always makes sure that your work is protected and stress-free. Register for airSlate SignNow now and get an integrated solution that is suitable for any workflow!
How it works
eSignatures and beyond — simplify document workflows with advanced airSlate SignNow features
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Best ROI. Our customers achieve an average 7x ROI within the first six months.
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Scales with your use cases. From SMBs to mid-market, airSlate SignNow delivers results for businesses of all sizes.
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Intuitive UI and API. Sign and send documents from your apps in minutes.
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FAQs
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How to password protect files on phone?
Protect your files with Safe folder On your Android device, open the Files by Google app . Scroll to "Collections." Tap Safe folder. Tap either PIN or Pattern. If PIN is selected: Enter your PIN. Tap Next. In the "Confirm PIN" screen, re-enter your PIN. Tap Next. In the "Remember your PIN" screen, tap Got it. -
How do I view a password protected PDF on my iPhone?
Download and the PDF Expert app from the App Store. Open the app's main menu, navigate to the Files Folder, and locate the PDF file. Tap the file, enter the password to unlock it. -
How can I lock a PDF file with a password?
Add a password to a PDF Open the PDF in Acrobat. Do any of the following: Go to All tools > Protect a PDF > Protect with password. ... In the Protect Using Password dialog box, select if you want to set the password for viewing or editing the PDF. Type and retype your password. ... Select Apply. -
Is there an app to lock PDF with password?
PDFEncrypt is a free, open-source native Windows app that allows you to password protect (encrypt) PDF files for free, without purchasing expensive software. PDFEncrypt is a free, open-source utility to encrypt PDF files using standard PDF encryption algorithms.
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Can I password protect a PDF on my iPhone?
You don't need any special apps or software to encrypt a PDF — you just need to add password protection, and you can do it quickly using an iPhone. Acrobat online makes it easy to password protect any PDF, creating a secure, encrypted file. -
How do I password protect a file on my iPhone?
Require a password to open a document , tap Document Options, then tap Set Password. Enter the requested information, then tap Done. -
Can you password protect a PDF on your phone?
Your personal details or business finances are vitally important to keep private. Whether you're at home or on the move, create a password to protect PDFs easily on your Android device using Acrobat online. -
How do I enable password protection on a PDF?
Open the PDF document you would like to password protect, select the Tools tab, scroll down to find the Protect & Standardize section, select Protect. 2. The Protect tool bar will appear, select the Encrypt button drop menu. Here you can either Encrypt with a Certificate or Encrypt with a Password.