Convert AVI to MP4 for Universal Compatibility

Convert your Audio Video Interleave files to MPEG-4 Part 14 online for free. AVI produces large files, lacks modern streaming support, and has limited codec flexibility — MP4 solves that. No registration, no watermarks, instant download.

Drag & drop your file here, or

Max 100 MB • Max 10 min duration • Max 1080p

How to Convert AVI to MP4 — 3 Steps

FFmpeg re-encodes your AVI file to H.264 MP4 — universal compatibility.

  1. Upload your AVI file

    Select your AVI file from old camcorders. Files up to 100 MB and 10 minutes in duration are accepted.

  2. Confirm and convert

    Confirm you own the file and click Convert to MP4. Processing typically completes in under 60 seconds.

  3. Download your MP4 file

    Download your MP4 immediately — ready to plays on every device.

Why Convert AVI to MP4?

AVI (Audio Video Interleave) produces large files, lacks modern streaming support, and has limited codec flexibility. Converting to MP4 gives you universal and social media.

UniversalPlays on every device — iPhone, Android, Windows, Mac, and smart TV
Social mediaYouTube, TikTok, Instagram, and Twitter all prefer MP4 uploads
Video editorsPremiere Pro, DaVinci Resolve, and Final Cut Pro handle MP4 natively
File sizeH.264 MP4 delivers excellent quality at small file sizes
StreamingHTTP streaming and CDN delivery are optimised for MP4 containers
SharingEmail, messaging apps, and cloud drives preview MP4 natively

Frequently Asked Questions

Why convert AVI to MP4?

AVI (Audio Video Interleave) produces large files, lacks modern streaming support, and has limited codec flexibility. Converting to MP4 gives you plays on every device — iphone, android, windows, mac, and smart tv.

Will I lose video quality converting AVI to MP4?

Our converter outputs H.264 video at high-quality settings. When re-encoding is required, we use settings that minimise visible artefacts. The resulting MP4 file will be visually very close to the original.

What AVI files can I upload?

You can upload AVI files from old camcorders, legacy Windows software, older screen recorders, and DVD rips. Files must be under 100 MB, under 10 minutes in duration, and not exceed 1080p resolution.

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

The maximum upload size is 100 MB and the maximum video duration is 10 minutes. Resolution is capped at 1920×1080 (1080p).

Is my AVI file kept private?

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

AVI & MP4 Format Guides

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

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

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