Convert AVI to MP4
Convert your AVI video to MP4. Free, instant, private — nothing is uploaded.
Drop your AVI video here, or click to browse
Converts AVI to MP4 — .avi files only
Related tools
Why use PixelTools to convert avi to mp4
Clean AVI to MP4 conversion
Fully re-encodes a decades-old Windows container, often wrapping dated codecs like DivX or Xvid into the most universally compatible video container, usually wrapping H.264 or H.265 video with AAC audio, using ffmpeg's native encoders so the output plays correctly wherever MP4 is expected.
100% private — no upload
Conversion runs entirely in your browser using WebAssembly. Your AVI file is never sent to a server, stored, or seen by anyone but you.
No account, no watermark
Free to use with no sign-up, no file limits, and no watermark on the output.
Why convert to MP4
The one format virtually every phone, editor, platform, and TV accepts without question.
Works on any device
Fully responsive with touch-friendly controls — convert files from your phone, tablet, or desktop without installing anything.
Safe for sensitive footage
Because nothing leaves your device, this is safe to use on personal recordings, unreleased footage, or clips you can't upload to a third-party server.
Three steps to convert avi to mp4
- 1
Drop your AVI video
Drag and drop your AVI file onto the page, or click to browse. Nothing is uploaded — the file stays on your device.
- 2
Conversion runs in your browser
A WebAssembly build of ffmpeg re-containers or re-encodes the video to MP4 entirely on your device. A progress bar shows the conversion as it runs.
- 3
Download your MP4 file
Preview the result right on the page, then click Download to save the MP4 file to your device.
Who converts AVI to MP4?
Whether you're a video editor, a content creator, or just need one clip in a different container — PixelTools converts AVI to MP4 instantly in your browser, with no upload and no account needed.
Working with older camcorders, legacy screen-recording software, and archived Windows video files
AVI files typically come from older camcorders, legacy screen-recording software, and archived Windows video files. Converting to MP4 makes them usable in the apps and platforms that actually need them.
Publishing or sharing as MP4
The one format virtually every phone, editor, platform, and TV accepts without question, which is exactly why people convert AVI to MP4 before sharing, uploading, or editing.
Editing and production workflows
Video editors and producers convert AVI to MP4 to match the container their NLE, platform, or client actually expects.
Fixing playback on the destination device
A AVI file that won't open on a phone, TV, or web uploader often just needs its container swapped to MP4 — no other editing required.
Frequently asked questions
Is the AVI to MP4 converter free?
+
Yes, completely free with no limits. Convert as many files as you want. No subscription, no account, no watermark.
Does this tool upload my video to a server?
+
No. The conversion happens entirely in your browser using WebAssembly. Your AVI video never leaves your device.
Why convert AVI to MP4?
+
AVI is a decades-old Windows container, often wrapping dated codecs like DivX or Xvid, typically from older camcorders, legacy screen-recording software, and archived Windows video files. The one format virtually every phone, editor, platform, and TV accepts without question.
Will the video quality change?
+
This conversion always re-encodes the video and audio into the target codec, so it isn't literally lossless — but it uses a quality setting tuned to be visually indistinguishable from the source at typical viewing sizes, at the cost of a longer conversion than a same-length stream-copy pair.
Is there a file size limit?
+
Files up to 2GB are supported. Very large files take longer to process since everything runs on your device's CPU rather than a server.
Can I use the converted MP4 file commercially?
+
PixelTools does not claim any rights over files you process. The output is yours to use however you like, subject to any rights the original file's owner holds.
I have an old AVI file from a camcorder or downloaded years ago — why won't anything modern open it?
+
AVI is a decades-old Windows container that often wraps dated codecs like DivX, Xvid, or uncompressed video — none of which modern phones, browsers, or editors decode anymore. Because AVI's codec mix is so inconsistent, this converter always fully re-encodes to standard H.264/AAC inside an MP4 wrapper rather than attempting a stream copy, which guarantees the result plays everywhere even when the source codec was obscure.
Need a different conversion?
Convert AVI to MP4 now
Free, instant, no account needed.
Start converting →