AVI Format Guide & Converter

Audio Video Interleave is an older Audio Video Interleave container from Microsoft Windows multimedia, introduced by Microsoft (1992). AVI still appears in legacy cameras, medical devices, and older Windows apps. Codecs inside vary wildly — convert to MP4 for reliable playback on modern phones and the web.

Full name

Audio Video Interleave

Kind

video container

File extension

.avi

MIME type

video/x-msvideo

Developer / standard

Microsoft · 1992

Compression

container (codec-dependent)

Quality model

Typically lossy

Container

No / single bitstream typical

Common codecs

—

Technical sources

—

Transparency

Not supported

Animation

No (still / non-animated typical use)

Typical size

Often larger than modern MP4 for the same picture

Browser support

Limited — convert to MP4 for reliable HTML5 playback

Compatibility

Playable with VLC almost everywhere; built-in Windows/macOS players often fail when the AVI wraps uncommon codecs

AVI compression: container (codec-dependent). Lossy encoding discards some information to shrink files — re-saving repeatedly can accumulate artifacts. Typical size profile: Often larger than modern MP4 for the same picture. Quality note: Depends entirely on the codec inside (DivX, XviD, MJPEG, etc.)

Quality: Depends entirely on the codec inside (DivX, XviD, MJPEG, etc.)

Typical size: Often larger than modern MP4 for the same picture

AVI does not support an alpha channel. Convert to PNG, WebP, AVIF, or SVG when you need transparent backgrounds.

AVI is a still-media or non-animated format in typical use. Use GIF, APNG, video, or animated WebP when you need motion.

Container metadata plus stream tags; phone videos often include orientation, location, and creation time.

• Legacy device exports
• Older Windows multimedia archives
• Source files awaiting modernization
• Forensic/legacy footage preservation before MP4 derivatives

• New web delivery
• Mobile-first sharing
• Assuming a single codec
• Streaming platforms that reject AVI

• Historical Windows support
• Simple for old toolchains
• Still readable by VLC
• Common in archives

• Dated container limits
• Codec chaos
• Poor modern device defaults
• Large files common

Playable with VLC almost everywhere; built-in Windows/macOS players often fail when the AVI wraps uncommon codecs

Browsers: Limited — convert to MP4 for reliable HTML5 playback

• Windows Media Player
• VLC
• VirtualDub
• ffmpeg

• Windows PCs
• Some older cameras
• Desktop editors

Open AVI with VLC for the best codec coverage. Windows Media Player and QuickTime often fail when the file wraps an uncommon video or audio codec.

Convert AVI to MP4 in Format Convertly for modern phone and web sharing — private browser conversion without uploading footage.

• Pick a target format from popular conversions or the full list below.
• Your file is read into browser memory — not uploaded to a server.
• Download the result when conversion finishes.

Incoming conversions strengthen the AVI cluster — e.g. JPG → AVI, PNG → AVI.

Compare AVI with related formats to pick the right container for quality, size, and compatibility.

Decision pages that cite AVI — the next hop after a vs comparison.

Tools extend the format graph beyond one-off conversion — compression, metadata, and utilities for real workflows.

Uploading sensitive AVI files to a random converter creates a third-party copy you cannot control. Format Convertly keeps processing on-device so photos, contracts, and exports stay private.