MP4 to AVI Converter
Convert MP4 video files to AVI format for legacy devices, older software, and industrial systems. Free online converter. Up to 100 MB.
Drop your MP4 file hereTap to choose your MP4 file
or
Also supports MOV, MKV, WebM, WMV, FLV • Max 100 MB
How to Convert MP4 to AVI
Upload
Drag and drop your MP4 video into the converter above, or click Choose MP4 File to browse your device.
Convert
Click Convert to AVI. Our server re-encodes your video into the AVI container with compatible codecs. Takes 30 seconds to 2 minutes.
Download
Click Download AVI to save the converted video. That's it — no registration, no email required.
When You Need AVI Instead of MP4
Legacy Windows Software
Older Windows applications from the XP and Vista era — including early versions of Windows Movie Maker, VirtualDub, and many enterprise tools — were built around AVI as the primary video format. These programs often cannot open MP4 files at all because MP4 support was not standard in pre-Windows 7 software. If you work with legacy Windows tools that require AVI input, converting your MP4 files is the simplest path to compatibility.
Industrial & Embedded Systems
Security camera systems, factory automation equipment, medical imaging devices, and digital signage controllers often use AVI as their native video format. These systems run specialized firmware that was designed before MP4 became widespread. Updating the firmware is rarely practical, so converting video to AVI remains the standard workflow for feeding content into these devices.
DVD Authoring Workflows
Many DVD authoring tools — including older versions of Nero, DVD Flick, and similar software — work best with AVI input files. While modern tools accept MP4, legacy DVD creation workflows often use AVI as an intermediate format because it was the dominant container when DVD was the primary distribution medium. Converting MP4 to AVI ensures smooth import into these authoring pipelines.
Older Hardware Media Players
Portable media players, in-car entertainment systems, and set-top boxes manufactured before 2010 frequently support AVI but not MP4. Devices from brands like Archos, iRiver, and early Chinese media players were designed around DivX/Xvid playback in AVI containers. If you have hardware that only recognizes AVI files, conversion is the only option for playing modern MP4 video on these devices.
What is MP4?
MP4 (MPEG-4 Part 14) is the international standard video container format, published as ISO/IEC 14496-14. Derived from Apple's QuickTime MOV format in 2001, it uses an atom/box architecture for organizing video, audio, subtitles, and metadata within a single file.
MP4 supports H.264 and H.265 video with AAC audio, and includes the faststart flag (moov atom at the beginning) for instant web playback without buffering. It's the recommended upload format for YouTube, Instagram, TikTok, Facebook, and every major platform.
The defining strength of MP4 is universal modern compatibility. Every computer, phone, tablet, smart TV, gaming console, and web browser manufactured in the last 15 years can play H.264 MP4 files natively. MP4 is the default choice for video distribution in the modern era.
What is AVI?
AVI (Audio Video Interleave) is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows technology. It uses the RIFF (Resource Interchange File Format) structure — the same architecture used by WAV audio files — to interleave video and audio data in alternating chunks.
AVI supports a wide range of video codecs including MPEG-4 Part 2, DivX, Xvid, Motion JPEG, and uncompressed video, paired with audio codecs like MP3, PCM, and AC-3. Its simple structure makes it easy for older software to parse and process.
Despite being over 30 years old, AVI remains relevant in specific niches. Its deep compatibility with legacy systems — older Windows software, industrial equipment, embedded devices, and DVD authoring tools — keeps it in use where newer formats like MP4 are not supported. The tradeoff is larger file sizes and no support for modern features like streaming, chapter markers, or advanced subtitle formats.
MP4 vs AVI: Quick Comparison
| Feature | MP4 | AVI |
|---|---|---|
| Developer | ISO/MPEG (2001) | Microsoft (1992) |
| Container structure | Atom/box (ISO base media) | RIFF (Resource Interchange) |
| Video codecs | H.264, H.265, AV1 | MPEG-4, DivX, Xvid, MJPEG, uncompressed |
| Audio codecs | AAC, MP3, AC-3 | MP3, PCM, AC-3 |
| Streaming support | Yes (faststart / fragmented) | No |
| Subtitle support | Text (tx3g) | None (external only) |
| Chapter markers | Supported | Not supported |
| Max file size | No practical limit | 2 GB (classic AVI) / 256 GB (OpenDML) |
| Modern devices | Universal | Partial (requires codec) |
| Legacy Windows | Limited (XP/Vista era) | Native since Windows 95 |
| Web browsers | All browsers (H.264) | Not supported |
| Best for | Web, mobile, streaming, sharing | Legacy systems, DVD authoring, industrial use |
Why Convert MP4 to AVI?
Legacy device compatibility
Older hardware media players, in-car entertainment systems, and portable devices manufactured before 2010 were designed around AVI with DivX or Xvid codecs. These devices have no firmware updates available and simply cannot read MP4 containers. Converting to AVI is the only way to play modern video files on this equipment without replacing the hardware entirely.
Older editing software
Video editing tools from the early 2000s — VirtualDub, early Premiere versions, Windows Movie Maker (XP/Vista), and many niche editing applications — were built before MP4 became the standard. These programs expect AVI input and may crash or refuse to import MP4 files. Converting to AVI provides a format these legacy editors can work with reliably.
Industrial & specialized systems
Security surveillance systems, medical imaging equipment, factory automation controllers, and digital signage platforms frequently require AVI as the input format. These systems run embedded software that was certified with specific AVI configurations and cannot be updated to support newer containers. Feeding video into these workflows means converting to AVI first.
DVD authoring & archival
Classic DVD authoring tools work most reliably with AVI source files. While professional tools have moved to MP4 and MXF, many budget and legacy DVD creation workflows still depend on AVI as the intermediate format between source video and final DVD structure. AVI also remains a common format in long-term video archives created before MP4 adoption, so converting new files to AVI maintains consistency within those existing collections.