Convert MP4 to AVI for Legacy Windows Compatibility

Convert your MPEG-4 Part 14 files to Audio Video Interleave online for free. MP4 can sometimes lack multi-track or subtitle support found in flexible containers like MKV — AVI solves that. No registration, no watermarks, instant download.

Drag & drop your file here, or

Max 500 MB · Max 30 min · Max 4K

How to Convert MP4 to AVI — 3 Steps

FFmpeg re-encodes your MP4 file to H.264, DivX, or Xvid AVI — legacy windows compatibility.

  1. Upload your MP4 file

    Select your MP4 file from cameras. Files up to 500 MB and 30 minutes in duration are accepted.

  2. Confirm and convert

    Confirm you own the file and click Convert to AVI. Processing typically completes in under 60 seconds.

  3. Download your AVI file

    Download your AVI immediately — ready to older windows software and industrial applications often require avi.

Why Convert MP4 to AVI?

MP4 (MPEG-4 Part 14) can sometimes lack multi-track or subtitle support found in flexible containers like MKV. Converting to AVI gives you legacy apps and windows media.

Legacy appsOlder Windows software and industrial applications often require AVI
Windows MediaWindows Media Player opens AVI files without additional codecs
CCTV/SecurityMany security camera systems record or export in AVI format
DirectShowDirectShow-based apps and older games expect AVI for video content
30-year supportAVI is recognised by virtually all video software from the past 30 years
DVD authoringSome DVD authoring tools accept AVI as a source format

Frequently Asked Questions

Why convert MP4 to AVI?

MP4 (MPEG-4 Part 14) can sometimes lack multi-track or subtitle support found in flexible containers like MKV. Converting to AVI gives you older windows software and industrial applications often require avi.

Will I lose video quality converting MP4 to AVI?

Our converter outputs H.264, DivX, or Xvid video at high-quality settings. When re-encoding is required, we use settings that minimise visible artefacts. The resulting AVI file will be visually very close to the original.

What MP4 files can I upload?

You can upload MP4 files from cameras, phones, screen recorders, and video editors. Files must be under 500 MB, under 30 minutes in duration, and not exceed 4K (3840�2160) resolution.

What is the maximum file size for MP4 to AVI conversion?

The maximum upload size is 500 MB for video/audio and the maximum video duration is 30 minutes. Resolution is capped at 1920×1080 (1080p).

Is my MP4 file kept private?

Yes. Files are processed privately and automatically deleted within 60 minutes. We never store, sell, or analyse your content.

MP4 & AVI Format Guides

Understand the formats you're converting between — specs, pros, cons, and use cases.

What is MP4?Full guide — technical specs, pros, cons, and compatible softwareWhat is AVI?Full guide — technical specs, pros, cons, and compatible softwareAll Format GuidesBrowse all 14 video and audio format guides

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