Fix PDF Form Fields Not Working After Security Is Enabled
Question details
User needs to restore functionality to a fillable PDF form that stopped accepting input or calculations after document security was applied.

- Product
- Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Securing a fillable PDF document before distribution without breaking its interactive fields.
- Observed behavior
- Form fields no longer accept text input, and automated calculations or JavaScripts fail to run after security settings are enforced.
Ensure you have the master or owner password for the PDF document, as you will need it to modify the security permissions and re-enable form filling.
Adjust Document Security Permissions
Modify the PDF's security restrictions to explicitly allow form filling and JavaScript execution.
When applying password protection to restrict editing, default settings might block all interactions, including filling out forms. Changing the specific permissions level will allow users to fill out the form without modifying the document layout.
Open the PDF in Acrobat, then click on 'File' and select 'Properties'. Navigate to the 'Security' tab.
Click 'Change Settings' and enter the permissions password when prompted.
Under the 'Changes Allowed' dropdown, select 'Filling in form fields and signing existing signature fields'.
Click 'OK' and save the document to apply the new security settings.

Remove Security to Test and Troubleshoot
Temporarily remove security settings to verify if the form fields function correctly on their own.
Easily Manage PDF Forms and Security with WPS Office
WPS PDF provides a lightweight and intuitive way to create, fill, and secure PDF forms without breaking functionality. You can easily set view and edit permissions while ensuring your fillable fields remain active for users.
- 1. Open PDF File: Launch WPS Office and open your fillable PDF document.
- 2. Access Encryption Settings: Navigate to the 'Protect' tab on the top ribbon and select 'Encrypt'.
- 3. Configure Permissions: Set an editing password and check the permissions box to customize what users can do.
- 4. Enable Form Filling: Ensure the option to allow form filling and commenting is selected, then click 'Confirm' to save your secured PDF.

Frequently Asked Questions
Why do PDF calculations break when a password is added?
High-level restrictions can sometimes block background JavaScript execution, which is required for automated form calculations. You must ensure document scripts are allowed in your specific PDF editor's security settings.
Can users fill a locked PDF without the password?
Yes, as long as the document's permission settings explicitly allow 'Filling in form fields'. Users will only need a password if they try to edit the core document structure, text, or layout.
Does WPS Office support filling secured PDF forms?
Yes, WPS Office can process fillable PDF forms securely, provided the document creator enabled form-filling permissions when locking the file initially.




