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How to Reduce and Compress MP4 File for Smaller Size with MP4 Compressor

People are itching to save all movies and videos in MP4 format on their hard drives. But you can't have your cake and eat it too. The large amount of MP4 videos take up a whole lot space, though files in MP4 format are playable on almost all media players. No wonder many people ask for solutions to reduce MP4 file size in order to release their hard disc space or fit on the memory card for their mobile devices. If you happen to be the one sweating over to find a reliable solution to compress MP4 video file, the following guide will be helpful, showing you everything about how to reduce file size of MP4 without lossing quality relying on a great MP4 compressor.

Part 1: Three Major Reasons to Compress MP4 File Size

Besides the abovementioned reason of freeing up your space by compressing MP4 videos, there're other 3 reasons why people are urgent to compress MP4 video files.
1. In spite MP4 is regarded as one of the best YouTube upload formats, the file with larger size usually gives rise to YouTube upload failure, not to mention slow upload speed. So you need a MP4 compressor to shrink MP4 file size down so as to share it on YouTube or Facebook faster and successfully.
2. E-mailing an MP4 video clip with smaller size to friends is much easier and faster than a larger one. So a MP4 compressor is a must-have.
3. For a successful playback of a high-resolution video on a small-screen phone, you need to reduce and compress MP4 video for smaller size to fit the screen, see with the help of a professional MP4 video compressor.

compress mp4

Fast Compress Reduce MP4 File Size - No Quality Loss

Compress MP4 files to smaller-sized video formats to email and upload to web faster, save storage space and play on portable devices.
* Compress MP4 in batches at fast speed (1 min for a 520MB 4K MP4 file)
* Compress HD/4k videos to MP4, MOV, WMV, FLV, WMV, etc with smaller size.
* Change codecs, lower resolution, bit rate, frame rate to shrink MP4 file size.
* Directly compress MP4 to iPhone/iPad/Android playable formats/resolutions.
* Compress MP4 to web sites, like YouTube, Facebook, Vimeo and more.
* Reduce MP4 video size before compression, such as crop/edit/trim/subtitle.

Hot Search: free MP4 compressor, Online video compressor,Top free video compressor, compress video for email, video compressor for Mac

Part 2: Top 3 Ways to Reduce & Compress MP4 Video File for Upload, Email, Playback and Space-Saving

Way 1: Reduce Size of MP4 to a Smaller-Sized FLV, WMV

There is a bewildering array of video formats besides MP4 - AVI, WMV, FLV, MOV, MKV, etc for compressing files, - and on top of that, how these formats stack up against each other, especially in terms of providing smaller file size than MP4? Which one is the best format to compress MP4 to? The table below will list the formats with both pros and cons.

Video formats




a. One of the most common formats compressed with a wide variety of codecs;
b. Compatible with many media players and major microsoft and non-microsoft operating systems.

a. It is too large to compress.
b. It requires specific codec to be installed on the computer in order to play it smoothly.


a. A tightly compressed format that requires a minimal amount of storage space, thus dramatically decreasing the size and increasing load time;
b. Have 2x better compression than MPEG-4;
c. Good choice for email and storage on your hard disk.

Have bad compatibility with non-windows platforms, like iPhone, iPad and other Apple devices, and Linux players. This is way WMV isn't the standard web format.


a. A suitable format for web video. It's viewable by over 90% web visitors, small in size and easly to be downloaded.
b. It's workable to compress MP4 to smaller FLV for web upload.

a. It's expensive and time consuming to create an FLV content.
b. Longer wait time to access a web page with Flash, especially when the visitor uses a dial up connection.


a. Open-source.
b. It supports menus like a DVD, chapters, and multiple audio streams for the inclusion of audio tracks in different languages;

a. Not universal across all media players and devices;
b. Usually come with larger file size up to 40GB

From the tablet listed above, you can easily draw a conclusion that WMV and FLV provide relatively small size. If you hope to compress MP4 format, it's advised to convert and compress MP4 to WMV or FLV so as to reduce MP4 file size using a professional free MP4 video converter.

See also: How to compress video files, resize video for upload, compress AVI, compress MOV, MP4 vs WMV, AVI vs MP4

Way 2: Change Parameter Settings, Incl. Video Resolution, Frame Rate and Bit Rate to Compress MP4 Files

compress mp4 by lowering resolution

Lower video resolution: The video resolution is closely bound up with video size and quality. Higher resolution usually results in larger video file size. Changing the original video to a smaller resolution will lead to a smaller file size. For HD MP4 video, as high as 1920*1080P, it's recommended to reduce to 1280×720, 800×600, 640×480, 640×360 using a video resolution converter. Generally, 640×480 is recommended as it is a good replacer for HD video, suitable for most devices (iPhone, iPad, Android) and fits for many websites (YouTube, Facebook, Vimeo), ifd you don't care much about the artifacts of compressed file.

compress mp4 by decreasing bit rate and frame rate

Decrease Bit rate: As for the bit rate, lowering the bit rate will bring about the decrease of the video file size. But please keep in mind the image quality will be bad in case you make the bit rate too low. We suggest you lowering bit rate 20-30% of original file.

Reduce Frame rate: With regard to frame rate, it has a lot to do with the file size. the lower frame rate, the smaller size you will get, and vice versa. Below is the suggested MP4 compression settings for YouTube as well as Vimeo. You can set it at 23.97fps to lower the file size of MP4 before compression.


MP4 compression settings for YouTube

MP4 compression settings for Vimeo

Video Codec

H.264 (Provide higher video quality for smaller MP4 file sizes)

H.264 (balances high visual quality and efficient file size)


426x240(240p), 640x360 (360p), 854x480(480p), 1280x720 (720p), 1920x1080 (1080p), 2560x1440 (1440p), 3840x2160(2160P)

640 pixels wide (SD) or 1280 pixels wide(HD)

Bit rate

1 Mbps (360p), 2.5 Mbps (480p), 5 Mbps (720p), 8 Mbps (1080p), 16Mbps (1440p), 35-45 Mbps (2160p)

2-5 Mbps (SD), 5-10 Mbps (720p HD), 10-20 Mbps (1080p HD), 20-30 Mbps (2K), 30-60 Mbps (4K)

Frame rate

The same as the original

24, 25, or 30 FPS as its value about 20 makes no difference.

Audio Codec

AAC-LC with a sample rate at 96khz or 48khz

AAC-LC with a sample rate at 48 kHz

See also: Best video codec, compress 8K videos, Compress 4K UHD to 1080P

Way 3: Trim Unwanted Part to Downsize MP4 Video File

Generally, trimming unwanted video clips from your big video file is a feasible way to decrease MP4 video file size. And some video editor tools as well as video size converter that toast the editing features can realize the task. You can either change the video file into multiple segments or cut off the unwanted clips like commercials, to get MP4 file size compressed.

Part 3: Feasible Tool to Reduce and Compress MP4 Files without Lossing Quality

Now that you've figured out the ways to compress and reduce MP4 file size, let's step forward to find the best MP4 video size reducer. Without any doubt, it couldn't be better to find one tool integrating the abovementioned MP4 downsizing features. Luckily, MacX Video Converter Pro (or Windows Version) realizes all what you need. It features MP4 video compression, parameter adjusting, excellent video editing and batch MP4 conversion. All you have to do is to load large-sized MP4 video, choose smaller-sized WMV or FLV, change the codecs, lower the bit rate, resolution, frame rate, etc, trim the unwanted parts if you like, and start the conversion.

The compression speed is never an issue with MacX Video Converter Pro. Support Multi-core CPU and hyper-threading technology, it makes full use of CPU, up to 8 cores, to fasten compression speed to a great degree. One thing needs to be mentioned, it is world's first media converter for Mac taking advantages of the breakthrough hardware acceleration Intel Quick Sync Video, thus managing to compress MP4 up to 5x faster than other converters, while sparing the computer resources for other tasks. Plus, the boasting of high quality engine will ensure a lossless quality even if you conduct the MP4 compression to make it smaller using the MP4 resizer. Therefore, you can play it on mobiles without worrying about storage full, upload it to Youtube, email to your friend as fast as possible with crisp image.

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Just follow the steps below, where tutorials about how to reduce and compress MP4 file size with the MP4 compressor is shown to you, if you've already downloaded the MP4 video compressor and got it installed on your computer.

How to Compress MP4 Files for Smaller Size on Windows and Mac

Step 1: Free download MP4 compressor and open it, load video to be compressed. Since batch conversion is supported, you can add more than one large space-hogging MP4 files to be compressed at a time. This tool supports the Windows 10/8/7 and macOS Sierra or early versions.
Step 2: Choose the video format as you want, such as WMV or FLV. And place the scroll bar to left for a low-quality but fast MP4 compression;
Note: For a lossless MP4 compression, you can stay MP4 format unchanged, and just directly to change its parameter settings.
Step 3: Trigger off the "Setting" window, where you can adjust the MP4 video parameters like resolution (640x480), frame rate (23.97fps), aspect ratio and bit rate.
Step 4: Go to the "Edit" Window to crop and trim MP4, delete unnecessary contents and black bars, in such a way of reducing MP4 file size with lossless compression.
Step 5: With all the steps finished, you can tap the RUN button to start compressing MP4 video to smaller size. The result shows the original 520MB MP4 file is compressed and reduced at least 40%, with file reduced to 310MB only.

compress MP4 and reduce mp4 file size

After the MP4 video compression procedure is finished, you can eventually utilize this MP4 compressor's sister MacX MediaTrans to transfer MP4 videos from Mac to mobile device (iPhone iPad included) without eatting up mobile space when you are on the journey or on the way home. It's also the ideal iPhone manager for you to free up space on iPhone iPad iPod by transferring iOS photos, videos, music and more if you have no extra space for MP4 MOV videos storage, instead of deleting anything you don't want to.

Part 4: Other Alternatives to Shrink Size of MP4, MOV, AVI, WMV, etc

MP4 compressor - WMM

1. Reduce MP4 video size in Windows: Windows Movie Maker provides a simple way to reduce the file size of any video thanks to its video editing and creating features. You can follow the steps to compress MP4 file size:

Import the MP4 video to be resized once you open the Movie maker, put it into the movie maker tineline, open the "Save Movie" wizard and select the desired file size for the finished video file on your computer.

MP4 compressor - imovie

2. Compress MP4 video with iMovie: Apple iMovie is an excellent video editing tool that can easily adjust the file size of a video, be it MP4, MOV, AVI or MKV. You just import your video file into iMovie by clicking and drapping the file's icon into the right panel of the iMovie window, click and drag it again down into the timeline at the bottom of the window, select "Export using QuickTime", click "Options" to choose desirable format, date rate, frame rate, etc, then click "Export" to finish video size reducing.
See also: iMovie supported video formats

Handbrake reduces MP4 file size

3. Compress MP4 Video with Handbrake: Although Handbrake doesn't allow to compress MP4 to files like WMV or FLV wiht smaller size, it does let you adjust parameter settings, including video quality, resolution and bit rate. If you are just wanting to reduce MP4 file size for uploading to YouTube or other web sites, you can just check the"Web, Device, High Profile" at the right side Optimized box, tweak the settings in the "video"category or reset the MP4 resolution under "Picture" option to get the desired result. Check the solution if Handbrake outputs large file size >>

online MP4 compressor

4. Decrease MP4 Video with Free Online Video Compressor: Clipchamp is definitely the free online video compressor champion in its circle. It's simple, fast and versatile, that's why more and more users give it a thumb up. To reduce and compress MP4 files online, you just need 3 simple steps to go: Select files > Select output > Create. I choose a HD MP4 music video of Demi Lovato's Cool for the Summer (53.2MB with duration of 3:47 in 720p) and compress MP4 MV to FLV format. Around 4 mins cost for the whole MP4 compression. I must admit the MP4 compression speed is closely related to my computer hardware configuration and network connection speed. If your hardware and network connection is good enough, the speed will get enhanced greatly.

Part 5: Side-by-Side Comparison and Test about Detailed MP4 Compression Ratio

Below is the table about the detailed compression ratio of the above 5 MP4 compressors.
Computer specifications: macOS Sierra (10.12) or Windows 10 64 bit; 4.0GHz quad-core Intel Core i7; 2TB Fusion Drive; Intel Iris Pro Graphics 6200.
Input video: a 4.30 min MP4 with a resolution of 3846x2160.
File Size: 520 MB


MacX Video Converter Pro

Windows Movie Maker




Supported input formats

Built in 370+ codecs, it supports compressing MP4, AVCHD, MTS, MKV, TOD, MOD, MP4, FLV, etc.



MKV, AVI, MP4, TS, M2TS, unencrypted DVD-like source.


Supported output formats

Compress HD/4K UHD videos to MP4, FLV, WMV, MOV, 3GP, MPEG4, H.264, MTS, MKV, and other 180 video/audio formats

MPEG, WMV, H264, MP4, MP3, AVI, MOV and WMA

H.264, MPEG4  



Time to compress a MP4 video

1.1 min

2.1 min

2.2 min

2.42 min

2.52 min

Size after compression






MP4 Compression rate






Quality after compression






Ease of use






Profiles for devices

Compress videos to suit high-screen iPhone, iPad, Samsung, Android, PS4, and other 350+ devices.



iPhone, iPad, Apple TV


Profiles for web

Reduce MP4 file size for uploading to YouTube, Facebook, Vimeo




built-in YouTube, Vimeo, Facebook, and Google Drive integrations

Profiles for editing/gaming

Shrink MP4 file for better editing or playing in iMovie, Final Cut Pro, PS4, PS3, etc





Best MP4 Video Compressor for Windows and Mac

Best software to compress MP4 files on Mac/PC by converting MP4 to smaller-sized WMV, FLV, etc in batch.

• Compress/convert any video: convert/compress any video to over 180 video formats and 14 popular audio formats.
• 350+ Preset Profiles for Apple and Android Devices: Compress video files to fit the screen of 350+ devices like iPhone 7/6s/Plus, iPad Air 2, iPad Mini 4, etc.
• Video Edit/Parameter Adjust: compressing MP4 to lower resolutions, codecs and bit rates, and editing MP4 files via trimming & cropping to shrink down MP4 size.
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