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Video Processing | Reduce Video File Size without Losing Quality

Fast reduce video size

How to reduce video file size without losing quality is becoming a hot search, especially when 4K ultra HD is becoming a standard. 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 compress/reduce file size without losing quality for YouTube/Email/mobiles from high space to low space will help you.

Sizes of Modern Videos are Way Too Big

While the videos are developing toward ultra HD resolutions like 4K, 5K or even 8K at an ever fast speed, we are facing with growing chanllenges of the size explosion. In most cases, we need to reduce the video size to make them acceptable by the social services, video sharing sites or devices. First of all, let's have a look at the common sizes we will meet in daily life.

▶ A minute of 4K video @60fps recoded by iPhone X: 200MB in HEVC and 400MB in H.264;
▶ A minute of 4K video @60fps shot by GoPro Hero6 Black: 600MB in HEVC;
▶ A minute of 1080P video @25fps exported from Premiere Pro CC: about 1.65GB in Apple Prores422;
▶ A minute of a RED 4K FF(6:1) video @24fps: 1.1GB;
▶ A minute of Phantom Flex 4K Raw video @24fps: 25GB.

Do you know the size limits of your favorite sites or services? YouTube supports a maximun size of 128GB so you're lucky. Others are out of luck. One FaceBook, only 4GB is allowed. WhatsApp allows pitiful 16MB. The limits of other email services range from 20MB to 10 GB. Feel helpless? Don't be. There is a way to compress video file size by up to 97% without losing perceptible quality loss.

How to Compress Videos to Smaller Size without Losing Quality?

Now, your saviour is coming. MacX Video Converter Pro (or Windows Version), the most efficient video compressor designed for UHD/HD videos. It completely addresses the never-ending high-definition video size reducing prolem, and the poor compressed quality users may meet with other reducers.

▶ It supports videos in 8K, 6K, 4K ultra HD, Full HD 1080P, HD 720P videos smoothly, no stuttering, jumpy or jerky processing;
▶ With 180+ video and 14+ audio formats supported, it will compress and reduce MP4, MOV, MKV, AVI, AVCHD, MTS, HEVC, H.265, etc.;
▶ Its codec & parameters adjustment, editing features reduce video file size by up to 97%. (a 148MB 4K video is reduced to 3.58MB with no detectable quality loss);
Unique 3-Level HW provides full support to Intel QSV, Nvidia Cuda/NVENC, AMD APP GPU accelerations. This unique feature not only deliver 5x faster video compressing speed, but also remove the CPU overheating or stuck problems when dealing with 4K and HD videos;
▶ High Quality Engine is a guarantee to the compressed video quality. About 98% original quality can be reserved.

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[Guide] How to Compress Video Size for YouTube/Mobiles/Email

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.

Step 2: To reduce video file size, there are three options to go:
▶ In the poping-up window, select an output format. Here you can compress video files from large-size formats into smaller ones: like H.264 to HEVC, MKV to MP4, FLV or WMV. Normally, to reduce video file size without losing quality, H.265 is the best choice; but for better compatibility, H.264 in MP4 format is highly recommended. For the perfect format for your specific purpose, like sending via email or uploading to YouTube, we'll talk later;
▶ Then click the to enter into the video setting window. Shrink video file size by adjust the video settings: you can downsize UHD videos to HD files to get smaller size, lower the bit rates of the video and audio, adjust the frame rate or change resolutions from 1080P to 720P;
▶ After that, click the Edit icon to access the editing features. Here you can cut out unnecessary length can also reduce the video size, like unwatnted ads & commercials, black bars etc.

Step 3: Click the output folder you want to save the compressed video by clicking "Browse" button. To allow the fast speed compressing 4K/HD videos and remain the top video quality, do remember to check the Intel/Nvidia/AMD Encoder and High Quality Engine on the lower part of the interface.

Step 4: After 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 MacX VS Handbrake

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.

Source video: a 4min 29s 4K UHD video in MKV format;
Output video: H.265 1080P @30fps, H.264 1080P @24fps, 1080P in MPEG4, FLV, WMV and AVI.
Summary: According to the tests, both video file compressors can convert the UHD video into smaller file with fast speed. First, MacX Video Converter Pro is faster than Handbrake. For example, to shrink the raw 4K video to HEVC 1080P, Handbrake takes 7 minutes while MacX Video Converter Pro uses 2 minutes only. More importantly, MacX Video Converter Pro has a better compression ratio up to 1:28 when convert the MKV UHD into HEVC format, compared to 1:13 in Handbrake. It's hard to tell the quality differences using both video file reducers.


Original Video







MacX Video Converter Pro

4K UHD, 4:29, 496MB

17.31 MB

42.85 MB

83.03 MB

44.19 MB

47.78 MB

68.42 MB


4K UHD, 4:29, 496MB

38.8 MB

69.50 MB

94.91 MB




Note 1: Best Format to Reduce Video File to Smaller Size

Different video formats may vary distinctly in size, just you may see from the above table, 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 or H.265 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. For newer devices, like iPhone iPad running on iOS 11, H.265 HEVC is suggested as it's designed with half the size of H.264. 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. First of all, check if the site or service support H.265. If H.265 is supported, then go for it. Besides, 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.)

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. Bit rate. Bit rate is used to measure the number of pits that are processed in a given amount of time. Bit rate will directly affect the file size. Higher bit rate means large file size and better video quality, and lower bit rate refers to smaller file size but less quality. Lowering bit rates is an efficient way to shrink video size. To ensure good compressed quality, it's safe to lower the bit rate to one level below the original setting.

2. 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, when you compress the downloaded 4k movie videos, or 4K clips recorded by camera or iPhone X, you may need a video resolution converter to do file size reduction.

3.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.

4. 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)

Reduce Video File Size by 70% with No Quality Loss

MacX Video Converter Pro is an excellent video size reducer, to super fast compress 4K uhd, 1080P/720P, SD MP4, MKV, AVI etc to smaller sizes 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 macOS.
• Versatile Video Editor, Parameter settings adjustment: free adjust video resolution, bit rate and crop unwanted parts, trim video length to shrink file size.
• 3-Level HW for 5x faster speed: unique support for Intel QSV, Nvidia, AMD APP when reducing video file size, 5x faster than other video compressors.
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