How to Resize MP4 Video with MP4 Resizer

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How to Resize MP4 Video with MP4 Resizer

14 January 2020 Amanda J. Brook Senior Product Manager

Last update by William Davis at 9 November 2026

Summary
MP4 files are so common in our daily life and work. The MP4 files we used sometime may not totally fit our needs. One of the most obvious problem is the resolution of the MP4 files. How to solve it when we encounter such problem? Following are solutions.

Content

Part 1: Reasons of Resizing the MP4 Video

Part 2: How to Resize the MP4 Video

1. Renee Video Editor Pro
2. Online Tools – Online-video-cutter

Part 3: Edit Video with Renee Video Editor Pro

Part 4: What Should be Attention

Part 1: Reasons of Resizing the MP4 Video

Generally, the resolution of the video depends on the situation it appear. And we need to adjust it accordingly.

Some HD videos is with extremely high resolution and large screen size, which fits computer but not mobile phone. Videos with large resolution is meaningless when playing on mobile phone which may not reach the standard. Besides, such files will take up much storage space of these devices.

Part 2: How to Resize the MP4 Video

To resize the video resolution, professional MP4 resizer and online tools are two most popular methods. Here, we will demonstrate about how to resize video with these 2 types of video resizers.

1. Renee Video Editor Pro

Resizing the screen resolution for video with video resizer is one of the common way. Here, a professional video editing software will be recommended.

Renee Video Editor Pro, a welcome video editing software, equips with many useful video editing tools like screen resizing, cutting, recording, effects, subtitles.

Renee Video Editor Pro – Multi-function Video Editing Software

Renee Video Editor Pro professional video edit tools

Screen RecordingRecord screen and webcam in Windows computer.

Cut Videos & AudiosUsers are free to cut videos and audios clips with setting start and end time.

Multiple Edit ToolsMerge, crop, rotate, cut and transform video easily. Change and add background music, subtitles and remove watermark from video.

Format ConversionSupport to convert videos and audios into different formats.

Screen Recording Record screen and webcam in Windows computer.

Multiple Edit ToolsCut Videos & Audios Users are free to cut videos and audios clips with setting start and end time.

Multiple Edit ToolsMerge, crop, rotate, cut and transform video easily. Change and add background music, subtitles and remove watermark from video.

Format ConversionSupport to convert videos and audios into different formats.

Free Trial Free Trial Free Trial

32321 users have downloaded and edited videos with fun!

Step 1: Open Renee Video Editor Pro and select [Video Toolbox].

select video toolbox in Renee Video Editor

Step 2: Click [Add files] and select target video.

Step 3: Click [Rotate & Crop].

Step 4: Click [Rotate & Crop]. Then select the desired part of the screen or set the specific size in the bottom. Then click [OK] to save the
settings.

Step 5: Select [MP4] in the output format and set the output folder. Then click [Start] to output the video.

online-video-cutter

Besides cutting video screen with the methods above, online tools like Online-video-cutter is also a good choice. Here we go.

1. Go to (https://online-video-cutter.com/). Click [Choose file] to upload the target video.

2. Click the icon which is marked with red and then choose a preferred screen size.

3. Click [Save] and download the video.

Demerits: Although it seems easier to use a online tool to cut the video, the saving time will be longer and ads is another annoying thing. Professional video editing software like Renee Video Editor Pro is strongly recommended.

Part 3: Edit Video with Renee Video Editor Pro

Another advantage of using Renee Video Editor Pro to resize video is users can edit the video with other functions like adding effects, subtitles, watermarks.

1. Download the target video from Internet. Then open Renee Video Editor Pro.

2. Click [Add Files] to upload the file.

3. Click the function you want from the list. Here we take [Effects] as example.

4. Select the effects you want to add to your video. Click [OK] to save the settings. And output the video.

Part 4: What Should be Attention

Before resizing the screen video with MP4 resizer, users should be clear about the target size. Video resolution, frame rate, brightness should also be taken into consideration when editing video. Besides, MP4 should be the best output format no matter we choose software or website.