MP4 → AVI
Convert MP4 videos to AVI – locally in your browser
Why MP4 → AVI?
Convert MP4 videos to AVI – for older programs. Directly in browser.
Frequently Asked Questions
Why convert MP4 to AVI?
AVI is supported by older programs and devices. For modern use, MP4 is better.
Are my files safe?
Yes, conversion happens entirely in your browser.
About AVI
AVI (Audio Video Interleave) was introduced by Microsoft in 1992 as part of the Video for Windows framework and was the dominant video format on Windows systems for over a decade. AVI is based on the RIFF container and can hold various codecs, most commonly DivX or Xvid for video and MP3 for audio. The format does not support streaming or subtitles and has a 2 GB file size limitation in classic AVI, which can be overcome through OpenDML extensions. AVI is now considered obsolete since MP4 and MKV offer more features with better compression. Nevertheless, millions of AVI files from the 2000s still exist, and converting to MP4 or MKV is frequently necessary for modern playback. VLC and FFmpeg can read and convert AVI files with near-perfect reliability. AVI was the format that initiated the era of digital video on PCs and fueled the spread of movie rips on the internet.
About MP4
MP4 (MPEG-4 Part 14) was standardized in 2001 as ISO 14496-14 and is the most widely used container format for video and audio worldwide. Based on Apple QuickTime format (MOV), MP4 can hold various codecs, most commonly H.264/AVC or H.265/HEVC for video and AAC for audio. The format supports streaming via HTTP Live Streaming (HLS) and Dynamic Adaptive Streaming (DASH), subtitles, chapters, metadata, and multiple audio and video tracks. MP4 is the standard format for YouTube, Vimeo, Netflix, and social media platforms. The broad codec support and compatibility with virtually every device and browser make MP4 the safe choice for video distribution. MP4 files can also contain pure audio (M4A) or images. The ISO Base Media File Format standard on which MP4 is based is also the foundation for 3GP, HEIF, and other container formats.
Why convert MP4 → AVI?
MP4 (MPEG-4 Part 14) is the standard video container format for web, mobile, and streaming. It contains video (H.264/H.265) and audio (AAC) in a widely supported format. Converting to AVI is required when you need to extract the audio track (MP3, WAV for podcasts or music editing), need a different video format (AVI for legacy systems, MOV for Mac workflows, WebM for open web standards), or want to create an animated GIF version for social media or presentations. AVI is an older Microsoft video format with large file sizes and outdated codecs.