1. Use Microsoft PowerPoint App:

One of the most straightforward ways to open a PPTX file on your iPhone or iPad is by downloading and using the Microsoft PowerPoint app. Follow these simple steps:

Step 1: Download the Microsoft PowerPoint app from the App Store.

Step 2: Sign in with your Microsoft account or create one for free.

Step 3: Open the app, tap on ‘Open,’ and browse your device for the PPTX file you want to open.

Step 4: The PPTX file will open, allowing you to view, edit, and share it.

2. Use Apple’s Keynote App:

Keynote is Apple’s alternative to Microsoft PowerPoint, allowing you to view and edit presentations on your iPhone or iPad seamlessly.

Step 1: Download the Keynote app from the App Store.

Step 2: Launch the app and tap on ‘+’ in the top-right corner to create a new presentation or select an existing PPTX file stored on your device.

Step 3: To import a PPTX file, tap on ‘Import’ and browse your device for the desired file.

Step 4: The PPTX file opens in Keynote, ready for editing or presenting.

3. Use a Third-Party App:

There are several third-party apps available that allow you to open PPTX files on your iPhone or iPad. Some examples include Google Slides, WPS Office, and Polaris Office.

Step 1: Download your chosen third-party app from the App Store.

Step 2: Launch the app and sign in or create an account if required.

Step 3: Browse your device storage or cloud storage (depending on the app) for the PPTX file.

Step 4: Open it within the third-party app to view, edit, or share as needed.

4. Use Online File Converters:

Online file converters can open PPTX files in alternative formats, such as PDF, on your iPhone or iPad.

Step 1: Open Safari or your preferred web browser and navigate to a trusted online file converter, like smallpdf.com or zamzar.com.

Step 2: Upload your PPTX file to the website by selecting ‘Choose File’ or similar and browsing for the file on your device.

Step 3: Select the output format you want, such as PDF, and click on ‘Convert.’

Step 4: Download the converted file to your iPhone or iPad and open it using an appropriate app like Apple’s Books app for PDFs.

In conclusion, opening PPTX files on your iPhone or iPad can be done quickly and easily using various dedicated applications or online converters. Choose the best method that suits your needs, depending on factors such as personal preference, privacy requirements, and editing capabilities.