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ConvertAnyVideo

AVI to MP4 Converter

Convert AVI videos to MP4 in seconds. Change resolution, quality and frame rate if you like — all in your browser.

or drop files here

Up to 1 GB per file · Files never leave your device

  • 100% free
  • No sign-up
  • No upload — private
  • No watermark

How to convert AVI to MP4

  1. Add your AVI files

    Click “Choose Files” or drag and drop your AVI videos onto this page.

  2. MP4 is selected

    The output is already set to MP4. Open Advanced settings if you want to change the quality, resolution or length.

  3. Convert and download

    Click Convert. Your MP4 file is ready in moments — nothing is uploaded.

About the formats

AVI

Audio Video Interleave

AVI is a classic Windows video format from Microsoft. It is supported by older players, DVD players and legacy editing software.

MP4

MPEG-4 Part 14

MP4 is the most widely supported video format today. It usually stores H.264 or H.265 video with AAC audio and plays on almost every phone, browser, TV and editing app.

Frequently asked questions

How do I convert AVI to MP4?

Click “Choose Files” and select your AVI file (or drag it onto the page). MP4 is already selected as the output, so just click Convert and download your MP4 file when it’s ready.

Will I lose quality converting AVI to MP4?

When the video inside your AVI file is compatible with MP4, it is copied without re-encoding, so there is no quality loss at all. Otherwise it is re-encoded at high quality. You can pick the quality yourself in Advanced settings.

Is it safe to convert AVI files here?

Yes. Conversion runs inside your own web browser, so your files are never uploaded to our servers or anyone else’s. Nobody can see them, and nothing is stored after you close the tab.

Is the AVI to MP4 converter free?

Yes, it’s completely free. There’s no sign-up, no watermark and no limit on how many files you convert. Each file can be up to 1 GB.

Can I convert several AVI files at once?

Yes. Add as many AVI files as you like and convert them in one go, then download them one by one or together as a ZIP file.

Convert AVI to other formats

Convert other formats to MP4