How to Shorten and Resize Video on iPhone

Ollie Mattison

Feb 18, 2025• Proven solutions

Either for sharing or getting your message across, videos on iPhone need to be concise and short. Sizes will matter the most. You made a great video on your iPhone, and you simply want to extract out the best bit. For this purpose, you need to shorten or resize the videos on iPhone, making sharing much easy. Then, to have a manageable file size, iPhone built in editor is hard to ignore.

Part 1: How to shorten a video on iPhone

Changing the length of your clip right from your mobile device is easier when using the right resources. Mentioned below are a few approaches you can utilize to shorten up your video conveniently:

1. The Built-in Video Editor

The built-in trimming functionality of the iOS device shortens up or removes unwanted parts within its ecosystem. The trimming tool offered by the platform allows users to cut segments of their videos without permanently altering the original file. It lets you learn how to resize video on an iPhone by offering a clean timeline and editing interface.

Key Features

1. Users can zoom into the timeline for frame-level editing, ensuring that every cut is accurate.
2. As users adjust the sliders, they can instantly see the changes reflected in the playback.
3. The edited video can be instantly shared to different platforms while staying within a single interface.

2. iMovie

Another versatile video editing application offered by Apple is iMovie. It combines professional-grade tools with an accessible interface, enabling users to craft polished video projects effortlessly. Its video trimming functionality is a key tool for refining content, whether you’re editing a cinematic masterpiece or a simple home video.

Key Features

1. Users can drag and drop clips onto the timeline and adjust their duration by trimming either end.
2. iMovie also allows users to split clips into multiple segments to isolate specific parts of a video.
3. Trimmed clips can be enhanced by adding transitions and effects to the application.

3. Filmora App

One of the most reliable third-party applications that lets you resize a video on an iPhone is the Filmora App. This extensive application offers a complete suite of features to trim your videos utilizing advanced artificial intelligence. Moreover, you can cut multiple clips within the app’s timeline by simply selecting them.

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The Best AI-powered Video Editing Software and App

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Part 2: Resizing Videos On Your Desktop and Mobile With Filmora

Having learned about the different resources for how to adjust video size on iPhone, let us explore the different ways Filmora offers to trim videos. With this all-in-one media solution, you can resize videos from the desktop as well as a smartphone:

Method 1. Resizing Videos With Filmora App

Users can use multiple format ratios offered by the Filmora App to modify the existing size of the video. Provided next is the step-by-step guide on how to resize a video using this coherent application:

Step 1. Select the New Project Option

Once you have launched the application on your smartphone, access the “New Project” option from the homepage. Next, import your video to the app’s interface by accessing your device’s gallery within the app.

Step 2. Select the Size From the Formats Option

After the video is successfully imported, select the "Format” option located at the bottom. Now, select from the different aspect ratios offered by the app by tapping on them. Once the desired size is selected, press the small “Tick” button located within the interface to save the applied changes.

Step 3. Export The Resized Video From Filmora App

Once you have resized the video using the dedicated feature, the video with the applied aspect ratio will be generated in the following interface. You can apply further editing to it or simply tap on the “Export” button to save the resized video to your smartphone.

Method 2. Resizing Videos Using Filmora Desktop

If you are a content creator and looking for ways to resize your image while maintaining professional quality, Wondershare Filmora is the right choice. Beyond its intuitive interface, Filmora offers powerful features like Auto Reframe, manual trimming, and advanced compression that elevate the user experience and enhance creative possibilities. Let us explore these features to learn how to resize videos made on iPhone using Filmora:

1. Auto Reframe: This feature ensures that essential subjects remain within the frame, regardless of the chosen aspect ratio. The tool uses advanced AI algorithms to automatically detect the key focal points in a video and adjust the frame accordingly.
2. Manual Trimming: Filmora offers the easiest method of trimming video, which is simply dragging the video track to remove the unwanted part manually. The magnetic timeline feature simplifies the process as the clips get sorted automatically within the timeline.
3. Advanced Video Compression: It offers a range of customizable options, including quality rate and platform-centric compression. These settings allow users to strike the perfect balance between file size and video quality, tailoring the compression to meet specific needs.

Guide to Resize Video using Filmora Desktop Version

Provided below is the detailed step-by-step guide on how to resize video in an iPhone using Filmora:

Step 1. Start By Creating a New Trimming Project

Once you have launched the tool on your device, opt for the “New Project” option from the homepage to proceed forward.

Step 2. Import Video and Trim Tracks

In the main interface, import the video you want to trim and drag it to the editing timeline. From here, slide the head of the video track and drag it to the part of the video you want to remove. Once you are done with both ends, click the “Export” button at the top-right corner of the interface.

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Step 3. Use the Advanced Compression Feature

To shorten your video more, locate the “Advanced Compression” option and turn the toggle on for it in the export window. Next, specify the “Quality” according to your preferences by expanding the drop-down menu. Once done, press the “Export” button to finally save the compressed file.

Step 4. Use the Auto Reframe Feature

Launch the Filmora tool on your device and select the “Auto Reframe” feature from the homepage if you want to reframe the video automatically. 

Step 5. Import the Video and Select the Aspect Ratio

In the following interface, select the “Aspect Ratio” and “Motion Speed” from the respective drop-down menus and press the “Analyze” button to execute the process.

Step 6. Review the Resized Video and Export

Once the process is completed, the video with the required aspect ratio will be generated in the following interface. You can adjust the frame according to your preference and press the “Export” button once you are satisfied with the results. Conversely, to enhance the video further, hit the “Add to Timeline” button to import it to Filmora’s editing interface for further adjustments.

Filmora

⭐⭐⭐⭐⭐

The Best AI-powered Video Editing Software and App

Try it free Try it free

Download the APP

secure download

Conclusion

Being an iphone, iPod or iPad user, you can enjoy making high quality photos and videos, including 4K,1080p and 720 resolutions. But the downside is the large file size which makes them hard to retain. There are options to shorten or resize the iPhone videos and photos, by using any of above applications. Get a snippet or make size manageable, depending on "what you want". Just keep sharing the fun!

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Ollie Mattison

Ollie Mattison is a writer and a lover of all things video.

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