Convert AVI to MP4 Online
To convert an AVI file to MP4, upload it here, set the output format to MP4, and download the modern file — it works in any browser with nothing to install.
AVI dates back to the early 1990s, so old camcorder footage, downloads, and archived family videos often live in it. Modern phones, streaming apps, and websites either refuse AVI or need special players. Converting to MP4 modernizes the file once and for all, making it easy to watch, share, and back up alongside the rest of your library.
How it works
- 1
Upload your AVI video
Drag the AVI into the uploader — old camcorder captures, archived downloads, anything up to 500 MB per file works.
- 2
Set MP4 as the format
Select MP4 from the output options. The tool can also produce MOV, WebM, MKV, or a fresh AVI if a legacy workflow still needs one.
- 3
Download the modern file
Run the conversion and download the MP4. It will play on your phone, cast to your TV, and upload cleanly to YouTube or Google Drive.
Why use Video-Matic
Rescue old footage
Give twenty-year-old AVI files a second life in a format every current device understands — ideal before old drives or discs fail.
No legacy codec hunting
Old AVIs often depend on obscure codecs like DivX or Xvid. The cloud converter handles the decoding for you, so you never install a codec pack.
Three free conversions
A free account includes 3 credits and each conversion costs 1, so a small batch of family videos converts at no cost.
Auto-deleted uploads
Your originals and results are removed from EU-hosted servers within 24 hours — nothing lingers after you download.
Frequently asked questions
Why do my old AVI files not play anymore?›
AVI is just a container; the actual video inside is often compressed with codecs from the 2000s such as DivX or Xvid that modern systems dropped support for. Converting re-encodes that video into a current standard inside an MP4, so playback stops depending on software that no longer ships with your device.
Will converting AVI to MP4 make the file smaller?›
Usually yes — older codecs are less efficient, so re-encoding into a modern format frequently shrinks the file while keeping the same visible quality. Results vary with the source. If size matters most, run the converted MP4 through the Compress Video tool afterwards and pick a lower quality level.
Is the AVI to MP4 conversion free?›
You get 3 free credits on signup and each conversion uses 1 credit, so your first three files cost nothing. After that, one-time credit packs are available on the pricing page — no subscription required. Outputs are clean, with no watermark added.
Can I convert multiple AVI files at once?›
Conversions run one file per job, with each upload capped at 500 MB. For a batch, start a job for each file — each takes about a minute of your attention and 1 credit. If you want several clips merged into a single video afterwards, the Merge Videos tool combines them in order.