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Video Size Reducer | Shrink/Reduce Video File Size for YouTube/Mobiles/Email

Fast reduce video size

How to reduce video file size without losing quality is becoming a hot search. On one hand, we are facing with size-limited requirements in various cases, one the other hand, video files can easily occupy much space, especially for those in HD/UHD formats. Therefore, we are facing with no choice but to shrink video file size to smaller. For example:
YouTube says that the video is too large to be uploaded.
A single HD movie eats up 50% storage of the iPhone.
Email requires smaller file size to send the video.

Get the highest file size quota you can, or you will need a video size reducer to compress video size without losing quality. Worrying about the output compressed quality? Now tutorial to shrink/reduce file size without losing quality for YouTube/Email/mobiles from high space to low space will help you.

How to Compress Videos Fast and Small without Losing Quality? MacX Video Compressor Made it!

Tired of handbrake to reduce video file size with over 24 hours? Sick of the free online compressor producing a reduced video with poor quality? Now, your saviour is coming. That is MacX Video Converter Pro (or Windows Version), whose primary ability is to let you compress and reduce MP4, MOV, MKV, AVI, AVCHD, MTS, 4K UHD, etc. video size to smaller-sized FLV, WMV, etc. YouTube, E-mail and mobile friendly formats, with 180+ video and 14+ audio formats supported. Certainly, to reduce file size, it offers you two more options: parameter settings adjustment (resolution, Bit rate, frame rate, etc.) and video editing features (cropping & trimming) to dramatically reduce video files without video conversion.

How about the speed and quality? According to the professional test, a 9GB sized MP4 video file needs over 10 hours using Handbrake. Yet, when it comes to this top fast video compressor, it only costs you only 43 mins, thanks to its advanced Intel Quick Sync Video hardware acceleration tech. As for the quality, you will see no difference between the uncompressed one and compressed one, cuz the High Quality Engine minimizes the quality loss, keeping reduced files with 98% quality.

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[Guide] How to Compress Video Size for YouTube/Mobiles/E-mail

Step 1: Free download this video size reducer on Windows PC or on Mac computer, launch it and click "Add File" to load the video files you want to compress.

Note: To reduce video file size, there are three options for you to consider:
▶ Compress video files from large-size formats into smaller ones: like MKV to MP4, FLV or WMV. For the perfect format for your specific purpose, like sending via email or uploading to YouTube, we'll talk later;
▶ Shrink video file size by adjust the video settings: you can downsize UHD videos to HD files to get smaller size, or change the resolutions from 1080P to 720P;
▶ Removing the extra parts, lowering frame rate can also reduce the video size, like unwatnted ads & commercials, black bars etc. Now let's compress video files:

Step 2: Select a smaller-size format as the output format (to reduce video file size without losing quality, H.264 in MP4 format is highly recommended); adjust the video settings (bitrate, resolution, video codec, Sampling rate etc) and cut the unnecessary parts or split the video into shorter pieces etc to further shrink/decrease the file size.

Step 3: Click the output folder you want to save the compressed video by clicking "Browse" button.

Step 4: After you finish the above steps, click the "RUN" button to start to reduce video size without losing quality. The whole video file size compression task will be done within merely mins.

How to reduce video files without losing quality

Video Compression Performance of the Video Size Reducer

Why is MacX Video Converter Pro the best video size converter to convert videos small and fast without losing quality? To better illustrate its compress performance, below we have a simple comparison of the output sizes reduced by MacX Video Converter Pro and the famous video converter Handbrake. For a 4min 29s UHD video in MKV format, both video file reducer can convert the UHD video into smaller file with fast speed. Apparently, MacX Video Converter Pro has a better compression ratio up to 1:8 when convert the MKV UHD into MP4 format, while retaining relatively high output quality.


Original Video






MacX Video Converter Pro

4K UHD, 4:29, 496MB

83.03 MB

62.7 MB

44.19 MB

68.78 MB

68.42 MB


4K UHD, 4:29, 496MB

94.91 MB

77.24 MB




Note 1: Best Format to Reduce Video File Size from Large Space to Smaller Size

Different video formats may vary distinctly in size, and each format may excel others in special application. In other words, you can customize and shrink video file size with the above video size reducer based on your needs. (However, if you don’t want to bother, the H.264 MP4 will be your best choice.)

Compress video size for Email: the maximum size that most email services like Gmail, Outlook.com, Yahoo, AOL etc permit is around 25Mb, that's about a few minutes only. In most cases, users will need to reduce video to smallest size for email. To reduce file size for Email, WMV is a popular choice, which will provide relatively small size and good quality.

Downsize/compress video files for Android/iOS: all the mobiles come with limited storage, and a 4K UHD movie can occupy most space. To compress high space video to low space video for playback on Android, iPhone iPad, H.264 MP4 will be the most suitable format. This video format perfectly balances video size and output image quality. So you can use the above video size reducer to compress HD/UHD videos to MP4 without losing quality.

Reduce video size for YouTube/Facebook/web: each video-sharing sites imposes different limits on the size and formats that it accepts. Among them, FLV, AVI, WMV, MP4 are the most commonly used formats on web, and H.264 is the best recommend. To compress video for YouTube, Facebook, Vimeo, Dailymotion, NetFlix, Hulu and Break etc, try to convert videos to MP4 or FLV. (with the above video size compressor, you can choose to YouTube, Facebook, Vimeo etc and it will reduce and compress the video to suitable file size and quality.)

Compress MP4 Files, Compress MOV Files, Compress AVI files, How to Compress a Video on a Mac

Reduce file size for YouTube Email

Note 2: Best Video Settings to Reduce Video File Size without Losing Quality

The size of a video file involves various video audio parameters. To help users to further shrink video file size with the editing functions provided by the video size reducer above, you are also suggested to check the simple guide on the factors that affect the file size and select the best video settings to compress video size without quality loss.

1. Resolution. Resolution refers to the number of pixels in an image. Currently, there are standard video (SD) 720 X 480 pixels and HD video 1,920 X 1,080, 4k UHD 4096 x 2160 and 8K FUHD 7680 X 4320 pixels. Generally, the higher the resolution is, the larger the file size will be. In other words, the downloaded 4k movie videos, or 4K clips recorded by camera or iPhone 7 may require a video resolution converter to do file size reduction.
convert/compress 4K UHD videos

2.Frame rate. To reduce video file size without losing quality, frame rate is also a factor to concern. The higher number of frames will bring smoother motion effect. This means that video in 60fps will result in higher video quality compared with video in 24fps. However, 60fps is not as common as 24fps, and this is because the more frames in a video will significantly increase the file size.

3. Sampling rate. sampling rate is the number of samples of audio carried per second. Simply put, the higher sampling rate will result in higher audio quality. However, the higher quality means more samples are required, which will increase the file size. Therefore, the higher the sampling rate is, the larger the file size will be.

Best recommended video settings for file size compression

Besides, many other parameters like memory size, processing speed, colour palette etc also affect the video file size. For those who have trouble figuring out the most suitable format or settings when they shrink/reduce video file size without losing quality, here we also suggest the best video settings that you can follow to compress high space video to low space video with the above HD/UHD video size reducer.

4K UHD/HD 1080P video file size reduction

SD video file size compress

Format MP4 (file extension .mp4)
Codec: H264 (High profile)
Frame Rate: 24, 25 or 30 (Constant)
Frame Size / Resolution: 1280 x 720 (720p)
Fields: Progressive
Bitrate: 5,000 – 10,000 kbit/s
Codec: AAC-LC
Bitrate: 320 kbit/s
Sample Rate: 44.100 OR 48,000 kHz (retain original sample rate)

Format MP4 (file extension .mp4)
Codec: H264 (Baseline profile)
Frame Rate: 24, 25 or 30 (Constant)
Frame Size / Resolution: 1024 x 576
Fields: Progressive
Bitrate: 2,000 kbit/s
Codec: AAC-LC
Bitrate: 128 kbit/s
Sample Rate: 44.100 OR 48,000 kHz (retain original sample rate)

World's Fastest Speed to Reduce Video File Size, No Quality Loss

MacX Video Converter Pro is an excellent video size reducer, to super fast reduce 4K uhd, 1080P/720P, SD MP4, MKV, AVI etc to smaller files with original quality.

• Compress & Reduce All HD & SD Video: compress and reduce video files of any format like MP4 MOV MKV AVI FLV AVCHD MTS TS WMV, etc. to over 180 video and 14 popular audio formats on Mac OS X with 5X faster speed than any compressor.
• Versatile Video Editor, Parameter settings adjustment: free adjust video resolution, bit rate and crop unwanted parts, trim video length to shrink file size.
• Download & compress video to iPhone iPad Android: free download video music from 300+ sites and compress to mobile devices with 350+ preset profiles.
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