PDF Conversion Issues

Fix Office Mobile for iOS Not Opening Files When Converting Document to PDF

Amos GikundaAmos Gikunda Nov 4, 2026 869 views

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.

How to Fix Office Mobile for iOS Not Opening Files During Document to PDF Conversion
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 you start

Before proceeding with reinstallation or updates, verify that your local documents are fully synced to OneDrive or iCloud to prevent any accidental data loss.

Solution 1Recommended

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.

1
Sign Out of Your Account

Open the Office Mobile app, tap on your profile icon in the top left corner, and select 'Sign Out'.

2
Uninstall the App

Go to your iOS home screen, long-press the Office app icon, select 'Remove App', and then tap 'Delete App'.

3
Reinstall and Sign In

Open the App Store, search for Microsoft Office, download the application, and sign back into your account to test the Document to PDF feature.

Sign Out and Reinstall the Office Mobile App
Data Loss Warning: Deleting the app will erase files stored locally within the app's isolated storage. Ensure everything is backed up to the cloud first.
Free Microsoft Office alternative

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. 1. Download WPS Office: Install the free WPS Office app from the Apple App Store on your iPhone or iPad.
  2. 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. 3. Export to PDF: Tap the Tools menu at the bottom, select 'Export to PDF', and save your seamlessly converted file.
Free and lightweight mobile office suite for iOS devices.Fully compatible with Microsoft Office formats (DOCX, XLSX, PPTX).Seamlessly export documents to high-quality PDFs with a single tap.Flawless integration with the iOS Files app, iCloud, and third-party cloud drives.
microsoft office alternative - wps office

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.