As the name implies, Movavi Video Editor is a fully-featured video editor application. One of its many features is joining, so you can download this application to your Windows or Mac device and use it to combine AVI files together without any hassle. It also works with a range of audio and video formats, like MP4, and it's available in many languages.

It offers intuitive and easy-to-understand editing, with a smart interface that is very beginner-friendly. And there's lots you can do with this software, as well as just joining AVI files; it also supports trimming, rotating, zooming, filters, transitions, chroma key, and more.

Movavi Video Editor is free to start using, although you will need to pay to unlock the full features and functionality. Plus, you can access the full Movavi Effects Store to get even more custom content like stickers and titles to make your videos extra special and unique.

A lot of AVI joiners have to be downloaded and installed to your device, but Fastreel is an exclusively online AVI joiner. This means that you can load up the Fastreel page in your internet browser of choice, upload the AVI files that you want to join, and merge them together without the need for any downloads or installations.

This AVI combiner also works with other video formats, including MP4, MOV, MKV, and WMV, and it supports files of up to 500 MB in size. It also includes transitions, allowing you to add your own custom transition animations in between clips or scenes, along with a free music collection for users who would like to add some background audio when they merge AVI files.

Plus, you won't have to worry about security with Fastreel, as all of the files you applied are safely stored and inaccessible to any third parties.

If you're looking for a very simple and basic tool that you can use to merge AVI files, you may want to consider BRIZ AVI Joiner. This is a really easy-to-use piece of software that many people rely on to join multiple AVI files into one larger file, which can be handy when you're editing home movies or stitching clips together. 

As the name implies, BRIZ AVI Joiner is completely focused on joining AVI files. It doesn't have many other features, but the same company also offers a separate AVI Splitter you can download to split AVI videos into multiple clips.

With BRIZ AVI Joiner, you can download a free trial to test out the software before you begin. It features an easy-to-use interface, very fast video joining, and no quality loss through the joining process, so you won't have to worry about the final file having lower fidelity after you merge AVI clips together with this tool.

Boilsoft Video Joiner was previously known as the AVI/MPEG/RM/WMV Joiner. It has undergone a name change, but still offers the same levels of functionality and efficiency, giving users a simple tool they can rely on to combine video files of popular and commonly-used formats like AVI, WMV, MP4, 3GP, MPEG, and RM or Real Media files.

One of the things that users like a lot about Boilsoft Video Joiner is how beginner-friendly it is. With this app, it only takes a few clicks to start joining AVI files together, and it's easy to make sure that your AVI files are all in the right order and correctly sequenced before you begin the joining process.

Boilsoft Video Joiner also has some other basic video-editing features. You can use it to extract audio files from multiple videos and join them together into one complete file, for example, and you can choose between different video encoding profiles to get the right file for your favorite devices.

Bandicut Video Joiner is another AVI joiner app that you can use to merge AVI files together. It's capable of combining several video files into one complete package, making it a useful tool for people who want to combine lots of AVI clips together or merge a group of videos into one to save space or make the videos easier to share.

This app is compatible with Windows devices, and Bandicut Video Joiner has a free version that you can use to try out the software without having to spend any money. The full version also has a High Speed Mode, allowing users to quickly join AVI files together without any lengthy delays, and there's also an Encoding Mode that lets you merge AVI files with files of other formats.

In addition, Bandicut Video Joiner also allows you to customize the output of your final file, as well as adjust between different resolutions and encoding profiles. Plus, it supports cutting and splitting video files, giving you multiple functions in just one package.

If you're looking for a free way to combine AVI files on your Windows device, you may also want to use MediaJoin. This is a completely free-to-use tool for Windows devices that is capable of combining AVI files and other video format files into one larger file.

MediaJoin has been around since 2006 and is one of the oldest and most downloaded free AVI video joiners around. It's a very basic program, so you can't use it for more advanced editing, but if you only want to join AVI files together, this is an easy app to work with.

It's also worth noting that MediaJoin is only available in English, so users from other parts of the world may want to consider an alternative option that has multiple languages for the user interface to make it easier for them to join AVI files.

Joyoshare VidiKit is a comprehensive video toolkit and video editing suite that offers a wide range of features and functions for users who want to make lots of adjustments to their video files. It supports basic editing tools, including cutting, converting, compressing, and merging video files, and it works with most major formats, including AVI.

As well as being able to join AVI files, this toolkit is also capable of advanced editing and even recording. You can use it to record your device's screen and audio at the same time, and it features professional-level editing features like subtitles, watermarks, video repairs for corrupt files, and rapid conversions into other formats.

You can also use the Joyoshare VidiKit to work with videos extracted from DVDs or other video discs, giving you lots of possibilities, and it supports batch conversion and compression, allowing you to work with many files simultaneously.

Next up on our list of the top AVI joiners, we have the ImTOO Video Joiner 2. As the name implies, this piece of software is primarily focused on joining video files together. It doesn't offer lots of other features, but it's a simple and reliable tool when you want to combine AVI files. 

You can also make use of the ImTOO Video Joiner to join files in other formats, including MPEG, MP4, MKV, WMV, FLV, 3GP, MOV, and ASF. It features a handy preview window that lets you see what your final video will look like, along with settings that allow you to adjust the frame rate, video size, and quality. 

This AVI joiner is free to download but has a premium price tag that users will need to pay in order to unlock the full functionality of the application.

Easy Video Joiner lives up to its name as a very easy-to-use piece of software that allows users to quickly and simply combine multiple video clips into one single file. You can use it to join AVI files together, but it's also supportive of other video file formats, such as WMV, RM, and MPG. Some file types, like MVK, are not supported by this app. 

Easy Video Joiner aims to be a beginner-friendly app. It's very lightweight, quick to install, and easy to work with. Users can simply load their video files into the program and then click to join them together. You can also rearrange the order however you like, and it only takes a matter of seconds to join AVI files with this app.

Blaze Media Pro is another video editor and converter tool that you can use to merge AVI files. It's compatible with most of the major video formats, including MP4, WMV, and AVI, as well as audio formats like MP3 and FLAC, and users can get a lot of value out of this app, due to its wide range of features.

As well as being useful for combining AVI files, Blaze Media Pro is also a fully-featured converter tool that you can use to convert video and audio files into different formats. It also comes with audio editing, video editing, video and audio capture, video burning, and audio burning features. It's free to download but has a premium price tag you'll have to pay to get access to all of the aforementioned features.