How to Change MP4 Resolution on Windows? (4 Easy Methods)

If you need a quick and trouble-free solution, WonderFox HD Video Converter Factory Pro will fit the bill. As an entry-level video processor, it can help change MP4 resolution without difficulty. The self-explanatory layout and intuitive GUI make it accessible to everyone.

If you have VLC media player installed as your default media player, it can function as a flexible MP4 resolution changer. Just follow the simple steps below to get the job done.

Step 1: Add Your MP4 File(s)

• Run VLC, press "Media" on the top bar and choose "Convert / Save" option.

• Click "+ Add" to add your MP4 file (or multiple MP4 files for batch conversion).

• Click "Convert / Save" to proceed.

Step 2: Select MP4 Profile

• Navigate to the "Profile" drop-down list.

• Select "Video - H.264 + MP3 (MP4)" or "Video - H.265 + MP3 (MP4)" option

Step 3: Customize the Resolution

• Click "Wrench" to open the "Profile edition" window.

• Go to "Video codec" tab and then "Resolution" sub-tab.

• Manually enter the pixel values in "Width" and "Height" boxes respectively (example: 1920 × 1080).

• Click "Save".

Step 4: Start Processing

• Click "Browse" to choose a destination folder and rename your MP4.

• Click "Start".

If you have some video processing experience, HandBrake is undoubtedly a good choice. Armed with dozens of professional features, the freeware can do more than you think. Let's see how it works to change MP4 resolution.

Step 1: Add Your MP4 File(s)

• Open HandBrake, click File to import your MP4(s)

• A quick drag & drop is also allowed.

Step 2: Choose a Preset

• Click Presets to expand some popular options in different video resolutions.

• Pick a preset on the right (e.g., Fast 1080p30 or Very Fast 2160p60 4K HEVC)

• If there is no preferred preset, select "MP4" under the "Summary" tab.

Step 3: Customize MP4 Resolution

• Switch to the "Dimensions" tab

• Go to the "Resolution Limit" section and select "Custom"

• Manually enter your desired video resolution

• Enable Allow Upscaling

Step 4: Start Encoding

• Click "Browse" button to choose a destination folder.

• Click Start Encode.

💡 For multiple MP4s, you can configure each video resolution and click "Add to Queue" button for one-by-one processing.

Some people intend to change resolution of MP4 videos online. Definitely, online service offers a direct and simple way to process video files without any software installation required. Convertio is a decent website I've been using for years. You can have a try.

Step 1: Add Your MP4 File(s)

• Visit Convertio via this link: https://convertio.co/

• Upload your MP4 files from hard drive, cloud drive or URL.

• For free users, you're limited to upload MP4 files within 100MB.

Step 2: Choose MP4 Format

• Select "MP4" format in the drop-down list.

• Click the "Gear" icon to open the "Settings" window.

Step 3: Change MP4 Resolution

• Navigate to "Resize" section to select any ready-made video resolution.

• Or scroll down to the "Custom" option.

• Manually enter your desired width and height

• Click "OK" to go back.

Step 4: Convert and Save

• Click "Convert" to change resolution of MP4 online.

• When the conversion is complete, download the converted file back to your PC.

💡 Due to the upload file size limit, this method is more suitable for dealing with small-sized MP4 files.

Q1: Can I change MP4 resolution without losing quality?

A: No, your video will be re-encoded, which usually means some quality loss (even if it’s tiny). To keep quality as high as possible, don’t change the resolution too aggressively, avoid converting the same file multiple times, and choose a reasonable preset/quality setting.

Q2: Why does my output MP4 look stretched or squished?

A: This happens when you change the resolution but break the original aspect ratio. If your video is 16:9, use common 16:9 resolutions like: 3840*2160 (4K), 1920*1080 (1080p), or 1280×720 (720p). Avoid random width/height numbers unless you know the ratio is still correct.

Why does changing MP4 resolution take so long?

A: Because changing resolution requires re-encoding (it’s not an instant “copy”). Encoding speed depends on:

• Video length (longer = slower)

• Original resolution (4K takes longer than 720p)

• Codec choice (H.265 is often slower than H.264)

• Your CPU/GPU performance

That's all I want to share with you how to change the resolution of MP4 videos in 4 different methods. Pretty simple, isn't it? Based on your actual need, just pick any option. Hopefully, this post would shed some light on your matters, even if you have no video editing experience. Start your work now! Cheers!