AVI Converter
Free online AVI Converter. Convert AVI files to and from popular formats — fast, private, no signup.
Max file size 10MB. Sign up for more.
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Checking files and selected output formats.
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How to Convert AVI Files Online — Free & Instant
Convert large AVI video files to modern, compressed formats for easier sharing and universal playback.
Drag and drop AVI files from older cameras, screen recorders, or archived footage. The converter handles DivX, XviD, MJPEG, and uncompressed AVI codecs automatically.
Select MP4 for universal playback on every device and platform, MKV for preserving multiple audio tracks, or WebM for web embedding. Converting from AVI to MP4 typically reduces file size by 50-80% with H.264 compression.
Download your converted video at a fraction of the original AVI file size. Resolution and frame rate are preserved. The re-encoded file plays on modern devices without codec packs.
Video Format Comparison
Choose the right output format when converting AVI video files.
| Format | Compression | File Size | Compatibility | Best For |
|---|---|---|---|---|
| MP4 | H.264/H.265 | Small–medium | Universal | Sharing, streaming, social media |
| MOV | H.264/ProRes | Medium–large | Apple, QuickTime | Mac editing, iPhone recordings |
| MKV | Multiple codecs | Large | PC, media players | High-quality archiving, subtitles |
| WebM | VP8/VP9 | Small | Web browsers | Web embedding, HTML5 video |
| AVI | Various | Large | Windows, legacy devices | Legacy compatibility, editing |
Why Convert AVI Videos?
AVI files are often uncompressed or use legacy codecs, resulting in enormous file sizes. Convert AVI to MP4 with H.264 to reduce size by 50-80% while maintaining visual quality.
Smartphones, tablets, and smart TVs often lack AVI codec support. Convert AVI to MP4 for instant playback on iPhone, Android, Roku, Apple TV, and every modern media player.
AVI cannot be streamed in web browsers. Convert AVI to MP4 or WebM for HTML5 video playback, progressive download, and adaptive streaming on your website or video platform.
YouTube, TikTok, Instagram, and most social platforms reject AVI uploads. Convert AVI to MP4 before uploading to ensure your video is accepted and processed at the highest quality.
If your AVI contains multiple audio streams, convert to MKV to keep all tracks intact. MKV supports unlimited audio, subtitle, and chapter streams in a modern, open container.
Convert AVI video directly in your browser — no desktop apps, no plugins. Files up to 10 MB are always free, and all videos are deleted from our servers within 24 hours.
About the AVI Format
AVI (Audio Video Interleave) is a multimedia container format introduced by Microsoft in 1992 as part of its Video for Windows technology. It is one of the oldest video container formats still encountered today. AVI uses a straightforward structure where audio and video data are interleaved — stored in alternating chunks — allowing simultaneous playback of both streams. Its simplicity made it a dominant format throughout the 1990s and early 2000s.
While AVI benefits from broad legacy support and a simple, well-understood structure, it lacks many features expected in modern video formats. It has no native support for streaming over the internet, cannot embed modern subtitle formats or chapter markers, and its compression efficiency depends entirely on the codec used. AVI files also tend to be larger than equivalent MP4 or MKV files. The format is being gradually replaced by MP4 and MKV in virtually all use cases, though it still appears in older video archives and some legacy industrial systems.
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