AVI Compressor——How to Compress AVI Files Efficiently on Windows

If you have a pack of AVI videos stored on your hard drive, you may feel bothered that they occupy a lot of space. To save space or for other reasons, just compress AVI files to a smaller size now! Here I’d like to introduce an efficient AVI compressor to manage the compressing process. You can download this tool in advance and keep reading to see how to shrink AVI file size while maintaining high video quality!

Carina Carina | Updated on Aug 11, 2023

Part 1. Why Do We Need to Reduce AVI File Size?

Part 2. Compress AVI Files in 5 Ways

-----1. Use the Advanced Encoder

-----2. Downscale Video Resolution

-----3. Reduce Video Bit Rate

-----4. Lower Frame Rates

-----5. Remove Unwanted Parts

Part 3. Online Tool to Reduce AVI File Size

Part 1: Why Do We Need to Compress AVI Files?

AVI stands for Audio Video Interleave, which is a common video file format for data that contains both audio and video. The AVI files are usually of high quality but normally with large size. The huge size of the AVI files may cause many inconveniences, such as taking up a lot of space of hard drive and being difficult to upload and share online.

So if your AVI files are too large, you can compress them to save storage space. Moreover, compressed AVI files are also more efficient for sharing with friends or uploading to YouTube and some other websites. In this circumstance, I will show you how to downsize AVI file to a smaller size while preserving high quality with the best video size compressor. Now, download it here to get started!

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Compatible with Windows

100% Clean & Safe

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Part 2: How to Compress AVI Files with the Good Quality Preserved?

WonderFox HD Video Converter Factory Pro is highly recommended for reducing AVI file size directly and effectively. It is designed with compression, converting, editing, downloading, and many other practical features. It is extremely easy to use even if you have zero video editing and compressing experience. This all-purpose program allows you to shrink AVI videos in five handy ways.

The next part will demonstrate five ways to compress AVI files with the AVI size reducer. You can download this program to be prepared and see the detailed tutorials below.

Reduce AVI File Size Windows 10

WonderFox HD Video Converter Factory Pro is a professional video compressor that can easily and quickly compress AVI files while maintaining high quality. Users can get the compressed AVI files with a few simple clicks. Get it now to shrink AVI files immediately!

Reduce AVI File Size for Better Sharing and Storage.

Free downloadFree download this software and shrink AVI files now!

Method 1. Change the Advanced Encoder to Shrink AVI Files (High-quality Preserved)

AVI is often encoded through Divx/XviD/MPEG4/H264. Compared with these old codecs, H265/HEVC and VP9 are more advanced and can encode a video to a much smaller size with high-quality preserved. So you can convert AVI to H.265 (HEVC for MP4) or change the codec to the VP9 encoder to make AVI file smaller.

Free downloadFree download this program before starting the process.

Step 1: Launch HD Video Converter Factory Pro and open the Converter module. Then, hit the +Add Files button to load the AVI files. Or you can also drag and drop the source AVI files into the program.

Step 2: Click the big format image on the right side of the interface to expand the output format list. Go to the Video category and choose one format from either H265 for MP4 (recommend), H265 for MKV, or VP9.

Step 3: Click the bottom triangle button to set the destination folder and press the Run button to start the AVI compression.

Compress AVI Without Losing Quality

If you want to output the compressed video in the original format, then go to see the following methods.

Method 2. Downscale Video Resolution to Reduce AVI File Size

Typically, the higher the resolution is, the larger the AVI video size will be. So one of the most efficient ways to downsize AVI file is to reduce the video resolution. But this method will inevitably lead to a quality loss. So we suggest that you change video resolution from a high-quality video like 4K/2K/1080P so that the compressed video can still have a decent output quality.

GetGet this AVI video compressor and follow the steps.

Step 1: Launch the program and choose the Converter module. Then click the center + button to load files into the program.

Step 2: Unfold the right-side output format image and select the AVI format under the Video category or other formats as you like.

Step 3: Open the Parameter settings to change the Resolution under Video Settings. (e.g. from 1280x720 to 640x480) You can also head to the Quick setting below the Parameter settings and drag the sliders to your preferred resolution.

Step 4: Choose an output destination and press Run to start the AVI compression process.

Reduce AVI File Size Windows 10

Method 3. Reduce Video Bit Rate to Compress AVI Files

Video bitrate is also a crucial factor that affects the video file size. The lower the bitrate of the video is, the smaller the video size you will get. But this method also will degrade the video quality, so don’t make it too low or use this method with high bitrate video, otherwise, the image quality can be really bad.

InstallInstall the video size compressor and follow the how-to steps:

Step 1: Open HD Video Converter and select Converter to enter the main interface. Then follow the instruction on the main interface to load your AVI files into the program.

Step 2: Choose the original AVI video format or change it to another format by clicking the right-side output format image.

Step 3: Click the bottom compression button and drag the sliders to the right to set the compression ratio. (Note: The slider goes more right; the video is compressed smaller.) Alternatively, you can also open the Parameter settings and customize the specific video bitrate.

Step 4: Set the Output folder and press Run to start compressing AVI files.

Make AVI File Smaller

Method 4. Lower Frame Rates to Downsize AVI Files

Another effective way to compress AVI files is to reduce the video frame rates. The video is smooth enough to play between 24~30 fps, the higher frame rates may be invisible to the human eyes. So if your video is shot in 50 fps or 60 fps, you can reduce the AVI file size by changing the frame rates to 24 fps or 30 fps. But note that frame rates dropped under 20 fps will cause visible inconsistency during the video playback.

Before starting the process, free downloadfree download it to be prepared.

Step 1: Run the software and open the Converter window. Then click the +Add files button to import the source AVI files into the program. You can also directly drag and drop the source videos into the program.

Step 2: Hit the right-side format image to open the output format list. Go to the Video category and select the original AVI format. You can also select other formats according to your actual needs.

Step 3: Open the Parameter settings window and head to the Frame rate under the Video Settings. Choose an option from the Frame rate drop-down list, or you can customize another specific frame rate.

Step 4: Specify a destination folder to keep the compressed AVI files and then press the Run button to start compression.

Shrink AVI File

Method 5. Remove Unwanted Parts to Make AVI File Smaller

If your videos contain some redundant parts like black bars or some ads, you can also crop or cut these unwanted parts to reduce AVI File size. (This method can also compress AVI files with good quality preserved.)

You can downloaddownload this AVI size reducer here and see the tutorial.

Step 1: Just as the previous methods, you need to Open the HD Video Converter Factory Pro and select Converter among the five modules, then load the AVI files into the converter by clicking the +Add Files button or directly drag and drop them into the program.

Step 2: In the video taskbar, click the scissor icon to open the Trim window and trim AVI files to cut the unwanted parts, like ads. You can also click the fourth crop icon to remove the black bars and other nonsense pictures to shrink AVI files.

Step 3: Unfold the output format list on the right side of the interface and select the original output AVI video format or other formats under the Video category. (Tips: Keep the parameters (bit rate, encoder, resolution, etc.) of the output video consistent with the original video.)

Step 4: Specify an output path by clicking the bottom triangle button. And press Run to compress AVI without losing quality.

Reduce AVI File Size

How to Reduce AVI File Size with an Online AVI Size Reducer?

Someone may want to find an online solution when compressing video for it can reduce AVI file size without installing any software. But most online video compressors have common problems, such as size limit, low uploading speed, output format limit, no batch compression mode, etc. Anyway, if you persist with the online AVI size reducer, then I will show you how to compress AVI online with Clideo as the example:

Step 1: Open your browser and visit https://clideo.com/compress-avi;

Step 2: Click the +Choose file button to upload your AVI videos from your local PC. You can also load files from Google Drive and Dropbox. (Clideo only supports AVI video size less than 500 MB.)

The larger the AVI video is, the longer the uploading and compression time it takes. So, please be patient when uploading the AVI files. Once the AVI video is uploaded, this program will automatically compress it to a smaller size with a watermark embedded.

Step 3: Then click the Download button to save the video on your PC, Google Drive, or Dropbox.

AVI Size Reducer


These methods of compressing AVI files on desktop are all effective and do not contradict each other. Some of them may sacrifice the video quality and some don’t. You can apply one or more of the methods simultaneously to achieve a better AVI video compression process. If your AVI videos are of small size, you can also choose the online AVI compressor.

The above is all about how to compress AVI files efficiently and effectively with the best video compressor and online tool. Hope this post will perfectly help you with your troubles. Thank you for your reading!

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