How to Compress a Video in 2026: Complete Guide

Are you finding it difficult to share or upload your content?

• You edit a masterpiece, but when trying to post it to Facebook, the file is just too big.
• You shoot high-end footage, like GoPro adventures, raw Fraps gaming captures, or heavy professional formats such as WMV, TS, and MXF. But then your hard drive fills up and sharing is almost impossible.

Uncompressed, raw digital video files are the highest quality, but the tradeoff is massive file size. Even if you have lots of space on your computer or portable device right now, the minute you want to email, send, or upload that video, you'll quickly run into file-size limits.

And when it comes to fixing this, common questions always pop up: How can I shrink a video to fit a platform's limits without losing clarity? Can I make the file size smaller and still keep the quality?

The answers are Yes!!! In this guide, you'll learn how to compress a video easily and efficiently and keep quality loss to an absolute minimum. Before we dive into the steps, let's take a look at a few foundational things you should know about video file sizes.

How do you effectively compress a video file or optimize its size? And why does a video sometimes come out much larger than expected after you convert it? To properly reduce video size without ruining the visual fidelity, you first need to understand the core components that determine the size of a video file.

The final file size of a video is mainly determined by 3 factors: Bitrate, Encoder (Codec), and Frame Rate (FPS).

Generally, the higher the bitrate, the larger the file (File Size = Bitrate x Time). At the same length, a higher bitrate means more data is squeezed into each second, hence a larger file.

The encoder decides how the video is compressed. The newer encoders (H.265/HEVC, VP9, AV1, etc.) are much more efficient than the old standards (MPEG-2, MPEG-4, DivX, etc.). They give the same (or better) picture quality at a much lower bitrate, which automatically makes your file size smaller.

Reference Chart: Encoder Efficiency Comparison
(Example based on a 100-minute source video)

Resolution is the width and height of your video frame (e.g., 1080p vs. 4K). While file size is technically related to bitrate, a higher resolution also requires a higher bitrate to keep an image sharp, so the file size increases.

Frame rate means how many images are shown in a second. The higher the frame rate, the more images are presented, which naturally leads to a larger file size. Modern cameras often shoot at high frame rates like 60fps, 90fps, or 120fps, which will make the final video significantly bigger than normal videos with frame rates of 24fps, 25fps, or 30fps.

Obviously, a 2-hour movie will take up exponentially more space than a 30-second clip with the same bitrate settings.

Now you understand how video math works, you can lower your file size using these methods:

• Use a More Efficient Codec: Convert older formats (like MPEG-4 or MPEG-2) to newer ones like H.265 (HEVC) or VP9. Because advanced codecs can maintain high quality at lower bitrates, they can help you shrink the file without sacrificing visual clarity.
• Lower the Video Bitrate: The fastest way to make your file smaller (perfect for strict email or web upload restrictions) is to manually lower your bitrate.
• Downscale Resolution or Frame Rate: If you have a video shot in 4K at 60fps, you can greatly reduce the file size by lowering it to 1080p at 30fps for sharing on mobile or for normal web viewing.
• Trim and Crop: Cut out unwanted parts, intros, or dead space at the beginning and end of the clip to shorten the length.

💡 Apart from shrinking the video file itself, another common way to compress the video is by making it into a zip file. This will retain the video quality as it is, but the problem is that you can't open the video file until it is decompressed. Plus, platforms like YouTube or Facebook won't accept ZIP files for playback.

Since manual calculations can be tricky, the easiest way to condense video to the size you want is to use a dedicated video compressor software or app. Next, let's look at how to compress video files across different devices while preserving maximum quality.

A lot of software programs are developed around Windows to provide Windows users with simple and convenient solutions to various multimedia tasks.

If you want to reduce video size without losing quality on Windows, the best software to use isn't its built-in video editor but WonderFox HD Video Converter Factory Pro, a powerful program that can be installed on all Windows systems to convert videos to smaller sizes and keep the quality loss to the lowest degree.

The software incorporates all the compression skills mentioned above and simplifies the operation for you. If you are just getting started, you can use its Compression button to compress all videos you imported into the software in just one click. You can also compress videos using more efficient encoders like HEVC to greatly downsize video while keeping high quality. That said, the software leaves you with much control over bitrate, resolution, and frame rate, which you can customize freely to reach a balance between quality and size.

As the cherry on top, it can also trim and crop videos to cut file sizes off.

To minimize video file size with this software, you need to download and install the software first. Here's the download button:

Download for Free

Download for Free

* Before compressing, you should choose an output format in advance. You can open the Output Format section on the right and select a video format under the Video tab. It's recommended to keep the original video format. But you can convert to a different format, the output size will increase or decrease based on the format you choose.

There are multiple ways to compress a video file in this program:

👉 Watch this video to learn how to compress large videos efficiently on Windows:

It's good news for Mac users that the built-in apps QuickTime and iMovie can also be used as video size reducers to reduce the size of your MOV and MP4 files. Additionally, there's also third-party software to handle video compression of more formats. Let's explore them one by one.

Besides being the primary media player on Mac, QuickTime can help you make a video smaller by reducing the video quality. If you have a 4K movie, you can reduce it to 1080p, and the output size will shrink to about 1/3 to 1/4 of the original video size. You can select even lower qualities to further shrink the file. However, if you want to compress the video while still maintaining the same visual quality, QuickTime also allows you to use the high-efficiency video codec (HEVC) to achieve that.

iMovie not only allows you to edit video files but also compress them through different means. Of course, you can trim and crop your video files in iMovie to delete the undesired parts and that would reduce the overall file size. In addition, iMovie also lets you export files with smaller sizes directly. It can even make files small enough to send through email. All it requires is a few extra steps.

Remember that QuickTime and iMovie can only handle MOV and some MP4 files. If you want to compress a video of another format, use a separate tool, such as HandBrake.

It's a free and open source video transcoder that changes not only the video formats but also the compression methods, including encoder and bitrate. For beginners, it also provides ready-made presets that allow you to convert your files to the desired quality quickly without messing up with the settings. If you need more control over the output quality and size, you can customize an array of video options it provides.

iPhone can produce very high quality videos. But it's quite challenging to watch or transfer these videos due to their large file size. That's why you need to decrease the video size.

What's unfortunate is that iPhone does not come with a video compressor. But if you try to search for a video compressor in the App store, you can easily find many matching items. One app I'd recommend is Video Compress – Shrink Videos. It's a lite and simple app designed to compress video size, and with its "dummy" operations, you don't need to be an expert in compressing your video. Simply add the video, specify the target size and let the app do the rest.

💡 If you want to record small-sized videos, you can open Settings and click Camera. Go to Record Video and change the resolution to 1080p HD at 30 fps or 720p HD at 30 fps. This will reduce the file size significantly the next time you record a video.

There are several excellent video compressor apps available for Android devices. One of the popular ones is Video Compressor & Video Cutter. It's a lightweight and simple app that makes shrinking video size on mobile phones super easy. It also cares for quality and you can compress videos with high quality preserved. To save most of your storage space, you can delete audio and cut video to further cut down the size.

If you're running out of storage on your device, you'll benefit from an online video compressor that won't occupy your local space. The video compression will take place on the cloud so it also won't burden the CPU.

While most online services handle only small videos, FreeConvert offers a free video compressor that allows you to compress large videos up to 1GB. It has multiple compression methods where you can specify the target size, quality, resolution, and max bitrate. Additionally, it can also use H265 to reduce video size by 20-75% of your original video while still keeping the quality.

No registration is required and you can use the tool to convert 20 files per day absolutely free.

For advanced users who are familiar with command lines, you can also use FFmpeg, the well-known free and open-source multimedia program to quickly compress video files.

For instance, you can compress a video in FFmpeg while keeping the quality by adjusting the Constant Rate Factor (CRF) and using the H.264 or H.265 codec:

ffmpeg -i input.mp4 -vcodec libx265 -crf 28 output.mp4

• -i input.mp4: This specifies the input video file. Please replace 'input.mp4' with your actual file name.
• -vcodec libx265: It sets the codec HEVC for your output file (you can use libx264 for broader compatibility).
• -crf 28: The Constant Rate Factor (CRF) controls the quality of the output video. Lower values mean better quality but larger file sizes. The CRF scale ranges from 0–51. (lossless: 0; default: 23; recommended: 24–28).

Instead of compressing the whole video, you can trim or crop the non-essential part at the beginning, the end, or around your video to reduce the file size.

You can find a video compressor that has a video cutter to do the job, such as WonderFox HD Video Converter Factory Pro mentioned here. But with most modern gadgets coming with built-in video editors, they are sufficient to trim and crop video files efficiently. These include:

• Microsoft's Video Editor (Clipchamp) on Windows 10 and 11
• iMovie on Mac
• Photos on iOS
• Gallery on Android

Or you can try third-party video cutters.

The steps are pretty similar.

Step 1: Load a video file to one of the video editors.

Step 2: Use the Trim or Crop tool to remove parts you don't need in the video.

Step 3: Click Export or Share to save the final file. When exporting, you may also adjust the settings such as bitrate and encoder to shrink down the file size even more.

Zipping a file naturally comes to most people's minds to reduce the size of a file. When it comes to compressing video files, zipping can also be useful.

The best part of it is that the video can be downsized without losing quality. But keep in mind that the file won't be overly compressed this way. Therefore, zipping a large video file is not a recommended choice.

Windows and Mac have the capability to zip your files natively. Just follow these steps.

🔔 Zipped files can suffer from corruption. It's advisable to keep the original copy of the video file.

• Locate the video file in File Explorer.
• Right-click on it and select Send to > Compressed (zipped) folder.

• Locate the video file in Finder.
• Right-click on it and select Compress [filename].

For some very large video files, compressing such files can greatly affect the output quality (unless you use a zip tool but the output size is still large). In this case, you can upload the video to YouTube or other sites such as Google Drive, etc., and then share the video link.

Compressing videos to reduce their file size is an important skill that everyone should master in this digital age. Luckily, the video compression tools come to our assistance and now we're able to store and share videos without worrying about the size. With the help of a powerful video compressor, we can also maintain the best output quality after video compression.

I hope this article really helps you and thank you for reading. Have a great day!

Video compression is the process of reducing the video file size by lowering the bitrate and resolution, changing the encoder, or trimming the length.

You can use the built-in video editor on your device to edit the length and adjust the export settings to make the video smaller for free.

To reduce the file size of a video without compromising quality, you can use the HEVC encoder that offers similar or better quality at lower bitrate, hence reducing file size. Programs like WonderFox HD Video Converter Factory Pro, QuickTime, and FreeConvert have the HEVC re-encoding options handy to use.

You need to compress the video small enough to email. The best way is to use a compression software that lets you set the target size so you can get your wanted size easily. Such a tool includes FreeConvert, a free online service that can be accessed as long as you have an internet connection. However, note that the video quality may downgrade if the video is compressed too hard.

No. Windows Media Player does not include any editing functions. You can refer to other methods in this article.