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AVI to MP4 Converter
Convert AVI (.avi) to MP4 (.mp4) via a free public conversion API from the browser. UniConvert is come-convert-leave: no account and no permanent file library.
Open the interactive AVI to MP4 Converter (loads automatically when JavaScript is available).
How to convert AVI to MP4
- Step 1. Choose a .avi file from your device.
- Step 2. Confirm the output format is .mp4 — this page is already set to AVI → MP4.
- Step 3. Start the conversion, then preview, copy, or download the .mp4 result. Nothing is kept for later.
Why convert AVI to MP4 here
- AVI → MP4 uses a free public API called directly from the page — no UniConvert servers in the middle.
- Category: Video — Convert video containers and extract audio when media tooling is installed.
- No signup, no subscription, and no permanent storage of your files on UniConvert.
- Status: available now.
AVI to MP4 FAQ
Is this AVI to MP4 converter free?
Yes. UniConvert does not require an account for AVI → MP4. Ads may appear to keep the site free.
Do you store my AVI files?
Files for this pair are sent to the free conversion provider for processing and are not stored by UniConvert afterward.
What is the difference between .avi and .mp4?
.avi is treated as the input format and .mp4 as the output. Use this page when you specifically need AVI → MP4 rather than a generic upload form.
Can I convert other formats in Video?
Yes — open the Video category for other pairs, or use Convert a file to pick any available source and target.