MP4 to AVI

Convert MP4 to AVI online and free

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I tried it and immediately fell in love! It was so easy to use! After a couple conversions I bought the guys a cup of coffee. A couple more and decided this was too good to abuse! I joined! My life is so much easier!


I had a huge, problematic file to convert that couldn't go through the usual automated conversion process. The Zamzar team responded quickly to my request for help, and they took the extra steps needed to do it manually.


Used it for over a year to convert my bank statements to csv files. Great quick app, increased my productivity a lot. Also, amazing support - always helped me quickly!

Agata Wierzbicka

I've used this product for years. And customer service is excellent. Just had an issue where I was charged and I didn't agree with the charge and they took care of it, even though they didn't have to.


A very useful and professional site. The service is easy to use and the administrators are helpful and courteous.

David Shelton

It’s my first time using it. I had some complications doing it. I’m not very good at this. But I wrote to the company and I had a lot of help. I’m satisfied with customer service and with the app.

Ana Suárez

I use Zamar whenever I need to convert audio and video files from multiple submitters to 1 uniform file format for Audio and Video Editing. I can do multiple large files in a short amount of time.

Christopher Bee

Great thanks to you all for helping me to get the OLD files converted correctly. 20 years, quite a long time, reviewing the files brings much memory to me. That's the best gift I received last year. Thank you all again.

Jiunn-Ru Lai

I feel like Zamzar is an active team member, especially for projects that I work on where I am the workhorse and it saves so much time and frustration. I am spoiled with Zamzar, because they have set the bar for file conversion and customer service very high.

Deborah Herman

Fantastic service! My mom's computer died and she has 1000+ Word Perfect files she wants to keep for some reason. Since Word Perfect is basically dead, I decided to convert all her files. Zamzar's converter was perfect.

Aron Boyette

Trusted by employees at these brands

Employees of some of the world’s most well-known brands rely on Zamzar to convert their files safely and efficiently, ensuring they have the formats they need for the job at hand. From global corporations and media companies, to respected educational establishments and newspaper publications, employees of these organisations trust Zamzar to provide the accurate and reliable conversion service they need.

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Your files are in safe hands

Zamzar has converted over 510 million files since 2006

For every 10,000 files converted on Zamzar, we'll plant a tree. By using Zamzar you are helping to make a difference to our planet

We're committed to regular charitable giving. Each month we donate at least 2% of our company profits to different charities

From your personal desktop to your business files, we've got you covered

We offer a range of tools, to help you convert your files in the most convenient way for you. As well as our online file conversion service, we also offer a desktop app for file conversions straight from your desktop, and an API for automated file conversions for developers. Which tool you use is up to you!

Want to convert files straight from your desktop?

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Convert over 150 different file formats

Convert documents, videos, audio files in one click

Need conversion functionality within your application?

Explore the API

One simple API to convert files

100s of formats for you to choose from

Documents, videos, audios, images & more...

Why choose Zamzar?

With Zamzar, file conversions are easy, reliable and convenient, so you can quickly convert your documents, images, videos, and more, to the formats you need. With faster downloads of converted files, and friendly and helpful support when you need it, you’ll have everything you need to work with your files.

Because the service is provided online, there are no software downloads needed. Instead, every conversion occurs in the cloud, meaning you can convert your file anytime and anywhere.

Cloud Based

Because the service is provided online, there are no software downloads needed. Instead, every conversion occurs in the cloud, meaning you can convert your file anytime and anywhere.

Zamzar sees hundred of files converted each and every minute of the day.

Millions of Conversions Monthly

Zamzar sees hundred of files converted each and every minute of the day.

Zamzar remained available for use during the coronavirus pandemic, and we’ll continue to support our users who need their files converted.

Available 24*7

Zamzar remained available for use during the coronavirus pandemic, and we’ll continue to support our users who need their files converted.

We first launched in 2006, and in that time we have constantly innovated and improved the service that we provide.

Striving for Perfection

We first launched in 2006, and in that time we have constantly innovated and improved the service that we provide.

Tools to suit your file conversion and file compression needs

You’ll find all the conversion and compression tools you need, all in one place, at Zamzar. With over 1100 file-conversion types supported, whether you need to convert videos, audio, documents or images, you’ll easily find what you need and soon have your files in the formats and sizing that work for you.

MP4 Video Format

MP4 Converter

An MP4, sometimes known as an MPEG4, is a multimedia file that is used to store video or audio data. MP4 files are typically smaller in size than other audio or video file types because MP4 files use a mix of compression technologies. Video and audio compression are usually handled by different codecs (audiovisual encoders). The video part is compressed with MPEG-4, a standard that was developed by Moving Picture Expert Group (MPEG), while the audio is typically compressed using AAC compression.

The explosion in popularity of the MP4 format is largely down to Apple and the iTunes Store, as it is the standard format for almost all of the media downloaded from the store. MP4 files are also typically seen when a video is downloaded from the internet.

MP4 files can normally be opened on your computer using Windows Media Player or QuickTime, and can be opened on mobile devices without the need to download any applications.

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AVI Video Format

AVI Converter

The AVI file has the full name of Audio Video Interleave File and was created by Microsoft. It was originally created in 1992 and is used to store high quality video and audio in a single file. To do this AVI uses different codecs (ways of encoding the audiovisual data), which can make playback challenging if the underlying codecs required to decode the video or audio are not installed. Having been developed by Microsoft it's unsurprising that AVI files can be easily viewed on Windows Media Player.

Apple QuickTime also has a good record of support for this format too. The main difference between AVI and other video and audio formats is that it uses less compression, so whilst the quality tends to be higher file size is as well. An AVI file tends to use 1-2GB per minute of video.

Related Tools

How to convert a MP4 to a AVI file?

  1. 1. Choose the MP4 file that you want to convert.
  2. 2. Select AVI as the the format you want to convert your MP4 file to.
  3. 3. Click "Convert" to convert your MP4 file.

Frequently asked questions

If you’ve got any questions about converting or compressing files with Zamzar, we’re happy to help! We’ve answered a few commonly-asked questions below, to get you started, and you can find out more information about file conversion and compression with Zamzar, in our Help centre.

To change an MP4 file to AVI you will need to use a conversion tool. There are two main options – using an online conversion tool like Zamzar, or by downloading conversion software or apps (such as VLC media player) to your device. Zamzar’s three-step conversion tool is free, quick, and you don’t need to install any extra software. Just upload your MP4 file, select ‘Convert Now’, and your new AVI video will be ready to download and play.

While you can usually watch MP4 files on Windows 10 devices, you would need to use another tool to convert from MP4 to AVI. One of the easiest ways is to use an online conversion service like the one Zamzar provides. With these online tools, you usually just have to upload your video and click to convert it, before downloading your AVI file. There are other options for converting MP4 files, such as using downloaded software like VLC media player, but these downloaded tools would take up space on your device.

Using Zamzar’s free website is one of the quickest ways to convert files from MP4 to AVI. The online conversion tool only takes three steps – upload your MP4 file, select ’Convert Now’, and then download your new AVI video.

Other options include downloading and installing software on your computer, and then using this software to convert the file. VLC media player is an example of a software that can be used. However, by using a website like Zamzar, everything is online and there’s nothing extra to install on your machine.

It’s really easy to convert MP4 to AVI online using a website conversion service like Zamzar. The free conversion tool on Zamzar’s website only takes three steps – first upload your MP4 file, select what format you’d like to convert it to, and then download the new file. Other online conversion tools are also available, but Zamzar’s service is quick and secure, and allows you to convert multiple files at once.

Whether AVI is better than MP4 depends on what you are using the file for. MP4 files are smaller, so are easier to share, and they also work on most devices and players. However, while MP4 videos will usually play on Windows Media Player, AVI is the format that was designed for Windows. If you’re using Windows video-editing tools, you may prefer to edit AVI files.

You can easily create AVI video files using an online conversion tool like Zamzar – just upload your MP4 file, click to convert it, and then download your video in the new format.