PDF Editing Issues

Fix Acrobat PDF Form Number Formatting Issues for Swiss Format

Ayan Masood Oct 18, 2026 868 views

Question details

The user is experiencing issues with decimal separators when typing Swiss formatted numbers in a fillable PDF form, particularly on Android devices where the comma is missing from the numeric keypad.

Fix Acrobat PDF Form Number Formatting Issues for Swiss Format

Product: Adobe Acrobat Pro
Device & OS: Android
Scenario: Entering numerical data into a fillable PDF form using the Swiss number format (e.g., 11'222.33).
Observed behavior: Users must manually type a comma as a decimal separator during entry, and the correct format only applies after the field loses focus. On Android devices, the numeric keypad lacks a comma, preventing users from entering the data properly.

Before you start

Before troubleshooting, ensure you are testing the PDF form in the latest version of your PDF viewer on both desktop and mobile devices, as form handling and JavaScript execution can vary significantly across different applications.

Solution 1Recommended

Migrate from PDF Forms to Web Forms for Mobile Users

Due to the severe limitations and inconsistencies of PDF viewer apps on mobile devices, migrating to responsive web-based forms is the most reliable solution for capturing formatted numeric data.

PDF viewers on mobile devices, including Adobe's own reader applications, handle JavaScript and custom form validation inconsistently. Because mobile operating systems trigger digital keyboards based on HTML5 input types rather than PDF field formats, getting the correct numeric keypad with a localized comma is often impossible in a PDF environment.

Moving away from PDF forms for mobile data collection will drastically improve user experience and ensure accurate data entry.

Evaluate your form data requirements

Review your current PDF form and determine which fields are strictly necessary for your mobile users to fill out.

Select a web-form builder

Choose a responsive web form platform (such as Google Forms, Microsoft Forms, or dedicated HTML form builders) that supports native mobile keyboards.

Migrate form fields

Recreate your PDF fields in the web form, setting the number fields to accept localized decimal inputs natively so the correct Android or iOS keyboard is triggered.

Migrate from PDF Forms to Web Forms for Mobile Users

Mobile Viewer Limitations: Most mobile PDF readers strip out advanced formatting scripts to optimize performance, which is why complex configurations like the Swiss number format fail on smartphones.

Solution 2

Apply Custom Keystroke JavaScript for Desktop Users

If the form must remain a PDF for desktop users, you can use custom JavaScript in Acrobat Pro to force the correct handling of commas and periods during typing.

Seamless PDF Form Handling

Easily Edit and Fill PDF Forms Across Devices with WPS Office

Avoid complex formatting and compatibility issues by using WPS Office. WPS PDF provides an intuitive, cross-platform experience for editing, filling, and managing PDF forms on Windows, Mac, iOS, and Android seamlessly.

1. Open your PDF in WPS Office: Launch WPS Office on your mobile or desktop device and open your fillable PDF document.
2. Navigate to the Form tab: Click on the 'Form' tab in the top menu to access interactive form fields and filling tools.
3. Enter your data: Tap or click on the required fields. WPS PDF provides a smooth text entry experience that adapts securely to your device's native keyboard.
4. Save and share: Once your document is filled correctly, save the PDF or export it directly to share securely with your team.

Cross-platform compatibility for seamless form filling on mobile and desktopFully compatible with standard PDF formats and Microsoft Office document conversionsLightweight and easy-to-use interface for both editing and viewing PDFsAdvanced native tools for adding text, signatures, and form annotations

microsoft office alternative - wps office

Frequently Asked Questions

Why doesn't the Android numeric keypad have a comma for PDF forms?

Mobile operating systems like Android trigger specific keyboards based on the app's field requests. Standard PDF viewers often trigger a basic numeric pad that lacks localized symbols like a comma, ignoring the PDF's internal format settings.

Can I force Acrobat to format the number while I am typing it?

No, Adobe Acrobat typically applies formatting scripts (like the Swiss number format) only on the 'Blur' or 'Lose Focus' event, meaning the field will only format to the 11'222.33 layout after you click away from it.

Is there a way to make Swiss number formatting work perfectly on all mobile PDF viewers?

Unfortunately, no. Mobile PDF viewers, including Adobe Acrobat Reader on iOS and Android, have vastly different levels of JavaScript support. Complex custom formatting scripts often fail or are ignored completely.

How do I change the default decimal separator in Adobe Acrobat?

Acrobat generally relies on the system locale and language settings of your operating system. However, if the form creator explicitly scripted a specific separator within the PDF properties, it may conflict with your local device settings.

PDF Troubleshooting