MP4 to AVI Converter
Convert MP4 to AVI online — fast, secure, watermark-free. No signup required.
auto-delete in 24h · no signup · no watermark
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How to convert MP4 to AVI online
- Click "Browse Files" or drag your MP4 file into the converter above (up to 200 MB free, 500 MB with an account).
- The target format is preset to AVI — adjust quality options in the picker if you need to.
- Hit "Convert". Your file uploads over an encrypted connection and converts automatically in the cloud — nothing to install.
- Click the green "Download" button to save your AVI file. The original is deleted immediately and the result auto-deletes after 24 hours.
That is the entire flow — no email address, no software install, no watermark on the output. The page you are reading handles MP4 to AVI from start to finish.
What's the difference between MP4 and AVI?
MP4 (MPEG-4 Part 14) and AVI (Audio Video Interleave) solve different problems: MP4 is a media container format built for universal video playback and sharing, while AVI is a media container format whose strength is legacy video files, old camera footage. In practice you will meet MP4 when dealing with universal video playback and sharing, and reach for AVI when you need legacy video files, old camera footage — the table below compares them point by point.
| MP4 | AVI | |
|---|---|---|
| Full name | MPEG-4 Part 14 | Audio Video Interleave |
| Developed by | MPEG (ISO/IEC) | Microsoft |
| Released | 2001 | 1992 |
| Compression | Media container | Media container |
| Typical use | universal video playback and sharing | legacy video files, old camera footage |
| File extension | .mp4 | .avi |
| MIME type | video/mp4 | video/x-msvideo |
Why convert MP4 to AVI?
MP4 (MPEG-4 Part 14) is a multimedia container standardized in 2001 that bundles video, audio, and subtitles in one file. Usually carrying H.264 video with AAC audio, it is the most compatible video format in existence — every phone, browser, TV, and editor plays MP4. Here is when AVI is the better choice:
- →Some legacy Windows tools and DVD workflows still expect AVI input.
- →It runs in the cloud — 10 free conversions a day with files up to 200 MB (20/day and 500 MB with a free account) — so even a phone or an old laptop converts at full speed.
Before you convert: three quick tips
- ●Video conversion time scales with length — for long footage, trimming to the segment you need before converting saves both time and quota.
- ●Posting to social platforms? MP4 is the universally accepted choice. Short looping clips? GIF. Embedding on a web page you control? WebM is worth considering.
- ●Keep your original MP4 — conversion never modifies it, and if you later need a different target format, starting from the original always gives the best quality.
AVI conversion settings explained
Filevo encodes video with H.264 at CRF 23 using the veryfast preset, with faststart enabled — the engineering balance of compatibility, quality, and speed: the output plays on any device and starts instantly when streamed.
The audio track is encoded as AAC at 128 kbps (higher available in options). Resolution matches the source, auto-adjusted to even dimensions as the encoder requires.
How the conversion works
Filevo's MP4 to AVI conversion is powered by FFmpeg, the open-source media framework behind much of the world's video infrastructure. We run it with compatibility-first settings tuned for everyday playback, and stream progress back to your browser in real time. Because everything runs in the cloud, your device's CPU stays idle — the browser only uploads and downloads.
What is MP4?
MP4 (MPEG-4 Part 14) is a multimedia container standardized in 2001 that bundles video, audio, and subtitles in one file. Usually carrying H.264 video with AAC audio, it is the most compatible video format in existence — every phone, browser, TV, and editor plays MP4.
| Full name | MPEG-4 Part 14 |
| Developer | MPEG (ISO/IEC) |
| Released | 2001 |
| MIME | video/mp4 |
What is AVI?
AVI (Audio Video Interleave) is a video container Microsoft introduced in 1992. One of the oldest video formats still in circulation, it lacks modern features like streaming support and efficient codecs, so old AVI files are usually converted to MP4 for use on today's devices.
| Full name | Audio Video Interleave |
| Developer | Microsoft |
| Released | 1992 |
| MIME | video/x-msvideo |
Filevo vs other MP4 to AVI converters
An honest comparison — CloudConvert and Convertio are capable tools; here is where Filevo differs:
| Filevo | CloudConvert | Convertio | |
|---|---|---|---|
| Free tier | 10/day | 10/day | 10 credits/day |
| No signup needed | Yes | Yes | Yes |
| Watermarks | None | None | None |
| Ads on free tier | No | No | Yes |
| Pricing model | 1 file = 1 credit, shown upfront | Per conversion minute | Credit packs |
Privacy & file security
Filevo deletes your uploaded MP4 file immediately after conversion and removes the converted AVI within 24 hours. Everything travels over TLS encryption, processing is fully automated with zero human access, and your files are never used for AI training. See our Privacy Policy for details. Privacy Policy →
MP4 to AVI converter FAQ
How do I convert MP4 to AVI for free?
Drop your MP4 file into the converter at the top of this page, confirm AVI as the target, click Convert, and download the result. It is genuinely free: 10 free conversions a day with files up to 200 MB (20/day and 500 MB with a free account), no watermarks, no software to install, no account required.
Is it safe to convert MP4 files online?
Yes. Transfers are TLS-encrypted end to end, and conversion is fully automated — no human ever sees your files. Your uploaded MP4 is deleted the moment conversion finishes, and the converted AVI auto-deletes after 24 hours (you can delete it sooner). We never use your files for AI training or share them with anyone.
Will I lose quality converting MP4 to AVI?
Video is re-encoded with H.264 at CRF 23 (veryfast preset) — a quality level that is visually indistinguishable from the source for normal viewing. Keep your original file if you need a frame-perfect master.
How long does MP4 to AVI conversion take?
It depends on length and resolution: short clips typically finish in well under a minute, while longer videos process at roughly real-time speed or faster. Upload time depends on your connection — for large files, uploading is usually the longest step.
Can I convert MP4 to AVI on iPhone or Android?
Yes. Filevo runs entirely in the browser, so it works the same on iPhone, Android, tablets, and computers — no app to install. On mobile, tap Browse Files to pick from your photos or files.
What's the maximum file size?
Anonymous conversions accept files up to 200 MB; a free account raises that to 500 MB. Paid plans go from 1 GB up to 10 GB per file, with higher daily limits and priority queues.
Can I convert multiple files at once?
One file per conversion today — though you can start several conversions in parallel. Batch upload with zip download is on the near-term roadmap.
What codec does the converted MP4 use?
Filevo encodes MP4 with H.264 video and AAC audio with the faststart flag — the most compatible combination, optimized to start playing instantly when streamed.
Whether you need legacy video files, old camera footage or simply a file that works where MP4 will not open, the converter above turns MP4 into AVI in seconds — free, private, and with nothing to install. Bookmark this page for the next time a MP4 file refuses to cooperate.
Last updated: 2026-06-11