How to Password-Protect and Lock a Fillable PDF on iPad
Question details
The user needs to lock fillable fields in a PDF invoice to prevent unauthorized editing on an iPad.
- Product
- PDF Reader Apps
- Device & OS
- iPadOS
- Scenario
- Preparing a finalized fillable PDF invoice to be shared, ensuring no further modifications can be made by the recipient.
- Observed behavior
- The fillable PDF remains editable by default, requiring a password protection mechanism to lock the fields on the iPad.
Ensure that your chosen PDF application is updated to the latest version on your iPad, as password protection features are often introduced in recent app updates.
Use Acrobat Reader Mobile to Set a Password
Use the built-in password protection feature in the latest Acrobat Reader Mobile app for iOS to securely lock your document.
In recent updates of the Acrobat Reader Mobile app for iOS, a native feature was introduced specifically to set passwords for PDF files.
Launch the Acrobat Reader app on your iPad and open the fillable PDF invoice you wish to lock.
Tap the three-dot menu icon or navigate to the 'Tools' tab to view document management options.
Select the 'Set Password' feature from the menu, enter a strong password, and confirm it to restrict editing capabilities.
Save the PDF file. Anyone attempting to open or edit the file will now be prompted to enter the password.
Use Native iPad Features to Flatten the PDF
If you do not have a dedicated PDF security app, you can use the iPad's built-in print feature to flatten the PDF, which locks the fields without a password.
Lock and Encrypt Your PDFs on iPad with WPS Office
WPS Office for iOS provides a seamless and comprehensive way to handle PDF documents. You can easily view, fill out forms, and encrypt your PDFs with a password to prevent unauthorized editing directly from your iPad.
- 1. Open PDF in WPS Office: Launch the WPS Office app on your iPad and open the fillable PDF invoice you want to lock.
- 2. Go to PDF Tools: Tap on the 'Tools' menu icon located at the bottom navigation bar.
- 3. Select PDF Encryption: Scroll through the options and tap on the 'Encrypt' or 'Password Protection' tool.
- 4. Set and Confirm Password: Enter your desired password to restrict editing and viewing, confirm it, and apply the settings.
- 5. Save the Locked PDF: Save the document. Your fillable fields are now protected from any unauthorized changes.
Frequently Asked Questions
Can I lock a fillable PDF on an iPad without using a password?
Yes, you can 'flatten' the PDF. By using the 'Print' function from the share sheet and zooming in on the preview, you can save the form as a standard, non-fillable PDF. This merges the filled data directly into the document, preventing further edits without needing a password.
Why can't I edit the PDF after setting a password?
When you set a permissions password to restrict editing, the file becomes locked to preserve data integrity. To edit the fields again, you must open the security settings and enter the original password to unlock the document.
Is the password protection feature free on iPad PDF apps?
It depends on the application you are using. While apps like WPS Office offer built-in encryption tools, others might require a premium subscription (such as Adobe Acrobat Premium) to access the 'Set Password' feature on an iPad.
