Convert any video file to MP4 format online for free. Fast, secure, and easy-to-use video to MP4 converter with no software installation required.
or click below to browse
Max file size: 50 MBMax duration: 30 min
Sign up for increased limitsA free account gets you up to 50 MB and 30 min.
Drag and drop your AVI file, or click to browse for it.
Choose MP4 as the output and click Convert. The conversion runs on our servers, so your device does none of the work.
Download your converted file instantly. The download link expires in 1 hour for security.
Our powerful servers process your files quickly, delivering converted files in seconds.
Convert your files completely free with no hidden costs or subscription fees.
Your file is used only to make your conversion. It is never published or shared, and the download link expires after one hour.
Works directly in your web browser. No software download or installation required.
How the two formats differ on the things that change your result.
| Specification | AVI (source) | MP4 (result) |
|---|---|---|
| Container | RIFF AVI | MPEG-4 Part 14 |
| Developed by | Microsoft | MPEG |
| Introduced | 1992 | 2003 |
| Video codecs | MPEG-4 Part 2, DivX, Xvid | H.264, H.265, AV1 |
| Audio codecs | MP3, PCM, AC-3 | AAC, MP3, ALAC |
| Max resolution | Full HD (1080p) | 8K UHD |
| Typical bitrate (1080p) | 2–12 Mbps | 5–20 Mbps |
| Multiple audio tracks | Yes | Yes |
| Subtitle tracks | Not supported | Embedded (soft) subtitles |
| Chapter markers | No | Yes |
| Streaming optimized | No | Yes |
| Licensing | Patents expired | Patent-licensed |
| Plays natively on | Native: Windows · Needs a player: macOS, iOS, Android, Smart TVs | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs |
| Best for | legacy archives, Windows media libraries | web delivery, social media uploads, sharing with anyone |
This is a full transcode rather than a container swap, because MPEG-4 Part 2 is not one of the codecs MP4 carries. Every frame is decoded and re-encoded as H.264.
One practical gain here: MP4 is streaming-friendly, so the converted file begins playing while it is still downloading.
This conversion buys reach. Unlike AVI, MP4 is natively supported on web browsers, macOS, iOS, Android, and smart TVs, which is usually the reason people convert in this direction.
Expect the bitrate to move from roughly 7 Mbps to about 13 Mbps at 1080p, and file size to follow.
Converting AVI to MP4 moves the video from the RIFF AVI container, introduced in 1992, into MPEG-4 Part 14, which arrived in 2003. Whether the picture is re-encoded or copied across depends on the codecs both containers accept.
Developed by Microsoft in 1992, AVI carries MPEG-4 Part 2, DivX, or Xvid video and MP3, PCM, or AC-3 audio. That combination sets the upper bound on what any conversion can preserve.
MP4 was introduced by MPEG in 2003. It carries H.264, H.265, or AV1 video with AAC, MP3, or ALAC audio and plays natively on web browsers, Windows, macOS, iOS, Android, and smart TVs.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
Quick access to the most commonly used file conversions
And many more format conversions supported