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1. Compress Video/Audio in Different Formats+
  1. 1.1 Compress MP4 on Winodws & Mac
  2. 1.2 Reduce Size of MP4
  3. 1.3 Resize MP4 Videos Online
  4. 1.4 Compress MP4 Online
  5. 1.5 Free MP4 Compressors
  6. 1.6 Compress FLV
  7. 1.7 Compress MKV
  8. 1.8 Compress MOV
  9. 1.9 Compress MOV Online
  10. 1.10 Compress WMV
  11. 1.11 Comrpess M4V
  12. 1.12 Compress MPEG/3GP
  13. 1.14 Compress AVI File
  14. 1.15 Reduce Size of MKV
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  16. 1.17 Compress WAV Free Online
  17. 1.18 FLAC Compression Software
  18. 1.19 Top 5 Online MP3 Size Reducers
  19. 1.20 Compress M4A Files Free Online
2. Compress Video from Devices/Apps +
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  6. 2.6 Top 12 File Compressor for Android
  7. 2.7 MMS Video Size Limit for iPhone/Android
  8. 2.8 Shorten Videos on iPhone
  9. 2.9 10 Video Compressor App Android/iPhone
  10. 2.10 Top 8 Video Size Reducers for Android
3. Compress Video with Different Apps +
  1. 3.1 Resize Video in iMovie
  2. 3.2 Make VLC Resize Video
  3. 3.3 Make Windows Movie Maker Resize Video
  4. 3.4 Different Apps to Compress Video
  5. 3.5 Compress Videos with Windows Media Player Alternatives
  6. 3.6 Use FFmpeg to Resize Video
  7. 3.7 Apple Compressor 4 Alternative
  8. 3.8 Top 6 Clipchamp Alternatives
  9. 3.9 Top 7 Video Cutter and Compressor
  10. 3.10 HandBrake Video Compressor Alternative
4. Compress Video for Different Purposes +
  1. 4.1 Compress Video for Email
  2. 4.2 Compress Video for Web
  3. 4.3 Compress Video for YouTube
  4. 4.4 Compress Video for Vimeo
  5. 4.5 Compress Video for Facebook, Instagram
  6. 4.6 Twitter Video Compression
  7. 4.7 Resize Facebook Video Size
  8. 4.8 Resize Instagram Video Size
  9. 4.9 Compress YouTube Video Size
  10. 4.10 Compress Video for DVD
  11. 4.11 Send Large Files via Email
  12. 4.12 Compress Files for WhatsApp
  13. 4.13 Send Long Videos on WhatsApp
5. Other Tips & Tricks +
  1. 5.1 Full Guide to Compress Video
  2. 5.2 Free Video Compressors
  3. 5.3 Top 13 Video Compressors
  4. 5.4 Top 10 Video Compressor for Mac
  5. 5.5 Top Audio Compressors
  6. 5.6 Top 8 Audio Compressor Free Online
  7. 5.7 Compress Files to Small Size
  8. 5.8 Compress HD/FHD (4K/1080P) Videos
  9. 5.9 Compress A Video
  10. 5.10 Compressed Video Formats
  11. 5.11 Top 8 Compression Software 2019
  12. 5.12 Top 9 File Compressors
  13. 5.13 How to Make A File Smaller
  14. 5.14 How to Make Video Smaller
  15. 5.15 Lossless Compression
  16. 5.16 Top 10 Ways to Reduce Video Size
  17. 5.17 Compress Files & Folders
  18. 5.18 Compress Folder Online and Free
  19. 5.19 Top 6 Online Size Converters
  20. 5.20 Top 10 Ways to Send Large Videos
  21. 5.21 Top 5 Video Resizer
  22. 5.22 Top 6 File Size Reducer
  23. 5.23 Shorten a Video Online and Free
  24. 5.24 Change MP4/MP3 Bitrate
  25. 5.25 11 Ways to Compress Videos Free Online

How to Compress AVI Files on Mac/Windows and Online

by Christine Smith • 2024-01-11 10:28:20 • Proven solutions

A large AVI file or some big AVI files may often give you trouble. Their relatively fatter bodies, compared with other multimedia format, often contributes a lot in occupying our disk space, which results in a lower and lower running speed of our computer. Moreover, it also causes problems when we want to share our favorite AVI movies on YouTube or Twitter.

Is there any way to compress AVI on Windows or Mac but without video quality loss? Sure! Read this article and you'll learn the best AVI compressor to reduce AVI file size, also the online tool to compress AVI online.

Part 1. Solutions to compress AVI files with AVI compressor.

An old idea is to compress AVI files with some standard compress utilities like .zip or .rar files. However, the result is less satisfactory, let's try something new.

Solution 1: Convert format. Convert your old AVI files to new AVI files or other formats like MP4, FLV, WMV files. With the new decoding and encoding skills, it will render smaller size comparatively.

Solution 2: Cut unwanted parts. Compress your AVI file by editing them: 1) Trim your AVI files: delete pointless parts and only keep your desired part. 2) Crop your AVI video as per your watching taste.

Solution 3: Reset the parameters. You can reset the frame rate, bit rate, video resolution and so on to cut the size down greatly.

Luckily, this all-in-one video compressor - Wondershare UniConverter (originally Wondershare Video Converter Ultimate) (Windows 10 and Mac Catalina supported) can achieve all above solutions. It can convert your original AVI files to virtually all other formats with great compatibility. With its batch conversion ability and built-in editing tools, you can compress AVI files at your fingertips. Learn the main features of Wondershare AVI compressor and follow the step by step guide to shrink AVI videos.

  • Compress AVI files by changing parameters like video resolution, bit rate, encoder, etc.
  • Convert AVI video to over 1000 formats, like MP4, MKV, MOV, FLV, etc.
  • Convert any video to optimized preset for almost all of the devices.
  • 90X faster conversion/compression speed than other common converters.
  • Edit, enhance, trim, and cut AVI videos with real-time preview to reduce the size.
  • Transfer converted videos from PC/Mac to iPhone/Android devices via a USB cable.
  • Download or record videos from 10000+ video sharing sites.
  • Versatile toolbox includes fixing video metadata, GIF maker, CD/DVD burner and screen recorder.
  • Supported OS: Windows 10/8/7/XP/Vista, macOS 11 Big Sur, 10.15 (Catalina), 10.14, 10.13, 10.12, 10.11, 10.10, 10.9, 10.8, 10.7, 10.6.

Part 2. A step-by-step guide to compress AVI files without losing quality.

Preparation: Download this Wondershare video compressor, and install it. Two versions are available (Mac version and Windows version, share the same features), and here we'll take Windows version as an example. You can also follow the steps below if you're using a Mac.

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Step 1 Load your AVI files to this AVI compression software.

Install and run this AVI compressor, drag & drop AVI files to the main interface, or go to the Menu bar and choose the Converter and click the add files icon in Wondershare UniConverter button to load your AVI files. You can add a couple of AVI files and do batch conversions to save your time greatly.

Add AVI files to the AVI compressor

Step 2 Compress AVI videos with 3 methods.

Method 1: Trim or Crop AVI Videos

Compress AVI files by trimming: Go to Trim window. Drag the slide bar to move back, and click Cut button to split the video into different segments. Select the segment you want to delete, and then click Delete button to go ahead. Then click the OK button to return to the main interface.

Compress your AVI files by trimming

Compress AVI files by cropping: Click the Crop icon to enter Crop window, and then adjust the crop area size from the pop-up edit window.

Compress your AVI files by cropping

Method 2: Convert AVI Format

Click the inverted triangle beside Output Format: to enter the Output Format pane to open the drop down list and select AVI, or MKV, MP4, M4V, FLV, etc. from the Format > Video option.

Select the video format

Method 3: Reset AVI Compression Settings

For customizing more settings, click on the compress icon to set parameters like resolution, encoder, bit rate, etc. You can even preview the compressed video for 20 seconds. This way can cut down your AVI size a lot.

reset video parameters

Step 3 Start Compressing AVI files now.

Click the Start All button and let this smart video converter do the rest for you. If you don't want to wait around during conversion, you can let it run in the background. That's all.

compress AVI files


Still feeling confused about the above steps? Don't worry! Open your Wondershare Video Converter again, move to the Toolbox section and choose Video Compress option, then follow the guide to compress AVI video one by one but much easier >>.

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Christine Smith

Christine Smith

chief Editor

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