Fix Office Mobile for iOS Not Opening Files When Converting Document to PDF
Question details
Users are unable to select files using the Document to PDF feature in Office Mobile for iOS because the application fails to trigger the native Files app.

- Product
- Office Mobile
- Device & OS
- iOS
- Scenario
- Attempting to convert an existing document to PDF format using the Office Mobile application on an iPhone or iPad.
- Observed behavior
- Tapping the Document to PDF feature does not open the iOS Files app to allow document selection, even though other features like PDF to Word function normally.
Before proceeding with reinstallation or updates, verify that your local documents are fully synced to OneDrive or iCloud to prevent any accidental data loss.
Sign Out and Reinstall the Office Mobile App
Since troubleshooting options on iOS are limited, a clean reinstallation can often resolve UI glitches and restore the connection to the iOS file picker.
Corrupted app cache or authentication issues can sometimes prevent specific features from executing properly. Reinstalling the app provides a clean slate.
Open the Office Mobile app, tap on your profile icon in the top left corner, and select 'Sign Out'.
Go to your iOS home screen, long-press the Office app icon, select 'Remove App', and then tap 'Delete App'.
Open the App Store, search for Microsoft Office, download the application, and sign back into your account to test the Document to PDF feature.

Update iOS and the Office Application
Updating to the latest software versions ensures you have the latest bug fixes deployed by developers for known compatibility issues.
Report the Issue via In-App Help
If the issue persists across different versions, submitting diagnostic feedback directly alerts the development team to investigate the bug.
Use WPS Office to Seamlessly Convert Documents to PDF on iOS
If Microsoft Office Mobile continues to fail when opening the Files app, switch to WPS Office. It is a highly compatible, free, and lightweight alternative that effortlessly converts documents to PDF on your iPhone or iPad without native file picker glitches.
- 1. Download WPS Office: Install the free WPS Office app from the Apple App Store on your iPhone or iPad.
- 2. Open Your Document: Launch WPS Office and tap the Files tab to easily browse and open your document from local storage or iCloud.
- 3. Export to PDF: Tap the Tools menu at the bottom, select 'Export to PDF', and save your seamlessly converted file.

Frequently Asked Questions
Why won't the Office app open the Files app for PDF conversion?
This is often caused by a known bug in specific versions of Office Mobile for iOS (such as version 2.55) where the app fails to correctly trigger the iOS file picker API for the Document to PDF module, while other modules remain unaffected.
Will I lose my unsaved documents if I reinstall Office Mobile?
Yes, if you have documents saved locally strictly within the Office app's storage that have not been synced to OneDrive or iCloud, deleting the app will permanently erase them. Always ensure your files are backed up to a cloud service before uninstalling.
How can I convert documents to PDF on iPhone without using the Office app?
You can use an alternative suite like WPS Office to directly open and export documents to PDF. Alternatively, you can use the native iOS Print function: open a compatible file, select Print, and pinch outwards on the print preview thumbnail to save it as a PDF.




