AVI video → MP4 video
Convert AVI video to MP4 video
Convert AVI video (.avi) to MP4 video (.mp4) right in your browser. Free and unlimited. Your files never leave your device.
Drop a file, or click to browse
Drop a file anywhere, click to browse, or paste an image. Files never leave your device.
Re-encodes to H.264 MP4 (runs locally; large files are slow).
Re-encoding a AVI video as MP4 video
Morphr converts both the video and audio of your AVI video into the MP4 video container, usually what’s needed when a player or upload form rejects the original. The transcode runs entirely in your browser, so larger files take a little time and show progress as they go.
AVI video and MP4 video, explained
AVI is a legacy Microsoft video container — widely recognised but inefficient by modern standards. MP4 is the video container almost everything can play, from phones to TVs to upload forms. Its H.264 video is the safe default when you just need a file to work everywhere.
Good to know
- Your AVI video files never leave your device — everything converts locally in the browser, so even confidential ones stay private.
- Convert as many AVI video files as you like at once; a batch comes back as a single ZIP.
- Everything runs in your browser, so large videos take longer and need enough free memory.
- No sign-up, no watermark and no size limit beyond your device’s memory.
The private way to turn AVI video into MP4 video
With Morphr, the whole conversion runs inside your browser tab using your browser's built-in decoder, so your file is never uploaded to a server, queued, or stored. That makes it a safe choice for personal photos, scanned documents and anything you'd rather not hand to a third party.
New to these formats? Read the guides on AVI video and MP4 video.
Frequently asked questions
- How do I convert AVI video to MP4 video?
- Drop your AVI video file onto the converter above (or click to browse), and Morphr converts it to MP4 video right in your browser. When it's done, click download — there's nothing to install and no account to create.
- What do I get converting AVI video to MP4 video?
- A single still frame, saved as MP4 video. Morphr extracts the frame in your browser — it doesn't re-encode the video, so the audio and motion aren't included, just the picture.
- Are my files uploaded to a server?
- No. The conversion runs entirely in your browser, so your AVI video file never leaves your device.