How to convert MP4 to AVI
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert MP4 to AVI
NexMedia converts MP4 to AVI on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About MP4
MP4 (MPEG-4 Part 14) is a container format standardised by ISO. It usually holds H.264 or H.265 video with AAC audio, and it can also carry subtitles and chapter markers.
It is the most widely supported video format: phones, browsers, smart TVs and video sites all play it.
The video inside an MP4 is almost always compressed with a lossy codec, so every re-encode loses a little quality.
Convert MP4 to AVI online free, no account required — AVI is Microsoft's older Windows video container.
Change MP4 to AVI without losing quality — convert MP4 to AVI free in your browser.
Why is my MP4 file so large? MP4 video is already compressed with H.264 or H.265, so a lower bitrate or resolution shrinks the file at the cost of some quality.
About AVI
AVI (Audio Video Interleave) is a container format Microsoft introduced in 1992 for video on Windows.
Older cameras, Windows software and video collections from the 1990s and 2000s.
AVI predates modern codecs and has no native support for features such as variable frame rate, so it is rarely used for new video.
Why convert video to AVI today? Mainly for older Windows software and DVD-era players that accept nothing else.
What changes when you convert MP4 to AVI
- The MP4 is re-encoded into AVI at the default quality settings, so the result looks close to the original but is not bit-identical.
Settings you can change
Before you convert MP4 to AVI, you can adjust: Video codec, Rate control, Quality (CRF), Video bitrate, Resolution, Width, Height, Scale fit, Frame rate, Encoder preset, Audio codec, Audio bitrate, Trim start, Trim duration, and Remove metadata.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted AVI file is kept for 2 hours, then deleted.
MP4 to AVI: questions and answers
Does converting MP4 to AVI reduce quality?
The MP4 is re-encoded into AVI at the default quality settings, so the result looks close to the original but is not bit-identical.
What is the difference between MP4 and AVI?
MP4 is a widely supported video container, usually holding H.264 video and AAC audio. AVI is Microsoft's older Windows video container.
Can I change the settings when converting MP4 to AVI?
Before you convert MP4 to AVI, you can adjust: Video codec, Rate control, Quality (CRF), Video bitrate, Resolution, Width, Height, Scale fit, Frame rate, Encoder preset, Audio codec, Audio bitrate, Trim start, Trim duration, and Remove metadata.
Do I need an account to convert MP4 to AVI?
No. You can convert MP4 to AVI without an account; signing in raises the file-size and daily limits.
How long is my converted AVI file kept?
The AVI file you convert from MP4 is kept for 2 hours, then deleted automatically.
When I convert MP4 to AVI, is the video re-encoded?
The MP4 is re-encoded into AVI at the default quality settings, so the result looks close to the original but is not bit-identical.
Will converting MP4 to AVI change my original file?
No. The conversion reads your MP4 and writes a new AVI file, leaving your original MP4 file untouched.