If you've got a collection of HD MKV videos and just picked up the new iPhone 6 Plus, you may have noticed that MKV isn't among the formats the device supports natively. The iPhone 6 Plus works best with MP4, MOV, and M4V files using H.264 video and AAC audio. This tutorial walks you through converting your HD MKV files into an iPhone 6 Plus–friendly format so you can enjoy them on that large 5.5-inch display.

A hand-drawn ink illustration of a smartphone screen showing a video playback interface, with a film strip winding around the device. Dark charcoal and warm amber tones dominate.

Tutorial: Converting HD MKV Videos to iPhone 6 Plus Friendly Format

To get started, you'll need a video converter that handles MKV input and can output to Apple-friendly formats. Pavtube HD Video Converter is one option that supports this workflow on both Windows and Mac.

Step 1: Load HD MKV video files

Launch the converter and click "Add Video" or simply drag and drop your HD MKV files into the main window. The software supports batch loading, so you can queue up multiple files at once.

Step 2: Choose a proper format for iPhone 6 Plus

Click the format dropdown and navigate to the Apple category. Select "iPhone 6 Plus H.264 HD Video (*.mp4)" as the output profile. This preset is tuned for the device's screen resolution and supported codecs.

Step 3: Customize video specs (Optional)

If you want finer control, click the Settings button to adjust parameters like bitrate, frame rate, resolution, and audio channels. The default preset should work well for most users, but advanced users may want to tweak these for quality or file-size tradeoffs.

Step 4: Start HD MKV to iPhone 6 Plus conversion

Click the large "Convert" button to begin processing. Once finished, you can transfer the converted MP4 files to your iPhone 6 Plus via iTunes or any file-transfer method you prefer.

For more details on transferring media to your device, check out our How-To Guides section. You can also explore the Pavtube HD Video Converter product page for full feature details.