MOV to AVI
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MOV to AVI converts Apple's QuickTime container into the Audio Video Interleave format that Windows has recognized natively since the early 1990s. The tool works by remuxing rather than re-encoding: it copies the compressed video and audio streams out of the MOV wrapper and drops them straight into an AVI wrapper, byte for byte. No frame is decoded, scaled, or recompressed, so the operation finishes almost instantly regardless of the clip's length and the picture quality is identical to the source.
The two formats come from very different eras and ecosystems. MOV is Apple's QuickTime container, built around a flexible atom-based structure that iPhones, iPads, and Macs use by default for anything recorded on-camera or exported from Final Cut Pro and iMovie. AVI predates it by years — it's Microsoft's original RIFF-based container from the Video for Windows era, and it was never designed with modern codecs like H.264 or HEVC in mind. It survives today mainly because a huge amount of Windows software, industrial equipment, digital signage systems, and older consumer electronics were built around it and never updated.
There's a technical wrinkle worth knowing before you convert: AVI is a "dumb" container, meaning it doesn't negotiate codecs the way MP4 or MKV do. If your MOV file holds HEVC (H.265) video — which is the default on any iPhone running iOS 11 or later — wrapping that same HEVC stream in an AVI file will produce a technically valid file, but a lot of older AVI-only software and hardware simply has no idea how to decode HEVC and will show a black screen or refuse to open it. The fix in that case is to re-encode the video to H.264 first (our MOV to MP4 tool does this) rather than expecting a straight container swap to solve a codec problem. Audio can have a similar quirk: classic AVI splitters built for Windows XP and Vista-era software expect MP3, PCM, or AC-3 audio, and can drop the sound entirely on an AAC track even though the video plays fine.
Everything runs locally through FFmpeg compiled to WebAssembly, so your camera roll never touches a server. That matters for anyone converting personal footage, security recordings, or unreleased project files they'd rather not upload anywhere. Once you have your AVI, the rest of the toolkit — trimming, muting, compressing — is available for further editing without leaving the browser.
The converter reads your MOV file's container index to locate the compressed video and audio packets, then writes a new AVI file header and streams those same packets into it in order — this is what FFmpeg's stream copy mode (-c copy) does. Because the actual H.264, HEVC, or ProRes payload is never touched, there's no quality loss and no re-encoding delay; a two-hour 4K file converts about as fast as a ten-second clip since the CPU only has to shuffle bytes, not decode and re-encode video frames.
Upload your MOV file
Drag a .mov file from your camera roll, GoPro, or Final Cut export onto the upload zone, or click to browse for it.
Check the file details
Confirm the filename and size shown match the clip you intended to convert before starting.
Click Convert to AVI
FFmpeg reads the compressed video and audio streams from the MOV container and remuxes them into a new AVI wrapper.
Wait for the near-instant remux
Because no re-encoding happens, even large files typically finish in a few seconds rather than minutes.
Download the AVI file
Save the output to your device — the filename keeps your original name with a .avi extension.
Test playback
Open the AVI in your target software (Windows Media Player, VLC, or a legacy editor) to confirm it plays correctly.
Convert another file if needed
Click to start over — there's no limit on how many MOV files you can convert in a session.
Windows Media Player Playback
MOV isn't natively supported by Windows Media Player without extra codec packs — converting to AVI gets you playback without installing anything else.
Legacy NLE Import
Non-linear editors from the Windows XP and Vista era, and some industrial video systems, only accept AVI as an input format for editing timelines.
Old DVD Authoring Software
DVD-authoring tools built more than a decade ago frequently require AVI or MPEG source files rather than MOV before they'll build a disc image.
USB Playback on Older Devices
Some digital photo frames, older TVs, and USB media players read AVI from a flash drive but have no QuickTime MOV support at all.
Windows-Based Archival Systems
Corporate or institutional archives built on older Windows infrastructure sometimes standardize on AVI for compatibility with existing cataloging tools.
Sharing With Windows-Only Recipients
If a colleague or client on an older Windows machine can't open your iPhone MOV clip, an AVI remux sidesteps the missing-codec problem entirely.
True Lossless Remux
Video and audio streams are copied byte-for-byte into the AVI container — there's no recompression artifact introduced at any point.
Handles HEVC and H.264 Source
Whether your iPhone recorded in HEVC or older H.264, the remux carries the stream through unchanged; just be mindful of playback compatibility on very old software.
Runs Entirely in Your Browser
FFmpeg WebAssembly does the work locally — nothing about your video content is transmitted anywhere during conversion.
No Re-Encoding Wait Time
Because stream copy skips the decode/encode cycle entirely, conversions finish in a fraction of the time a full re-encode would take.
No Server Upload Caps
Large camera and drone recordings convert without hitting an artificial upload size wall, since nothing leaves your device.
Free With No Watermark
Convert for free up to 40 MB with no account; sign up free for 80 MB, or go Pro for 250 MB per file — the output is never watermarked.
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