Convert AVI to MP4 — Free, Fast, No Limits

  • Step 1: Drag an AVI file here or use the file picker on the left. Big files are welcome, even over 1 GB. The upload starts right away.
  • Step 2: Our cloud converts your video to MP4. Most jobs finish quickly. Keep this tab open until it’s done.
  • Step 3: Hit <em>Download</em> and play your new MP4 on any device or add it to your editor.

  • Audio Codec:
    Video Codec:
    Resolution:
    Pick your preferred settings, or leave 'Auto' for the best defaults (note that recognition processes may take more time).

    • AVI 2 MP4
    Convert AVI to MP4
    SSL Encrypted
    Uploading...
    Icon

    Convert large AVIs to MP4


    Upload an AVI, get an MP4. It’s quick, private, and free. We accept large videos over 1 GB, and there’s no daily cap under fair use.

    Icon

    Fast and Easy to use


    Drag, drop, convert. Upload an AVI and get an MP4 in seconds. Use the defaults, or tweak simple options like codec, resolution, and audio.

    Icon

    Free Forever — No Limits or Sign-Up


    Conversion is completely free. No trials, no watermarks, and no account needed.

    Icon

    Multiple Codecs supported for Compatibility


    Leave settings on Auto for a balanced result. Choose H.264 for maximum compatibility, H.265 for smaller files on newer devices, or VP9 for web delivery. AAC is a reliable audio default, while Opus is great for speech. Keeping the original frame rate usually preserves motion best.

    Icon

    Built by Converter App — Trusted and Fast


    Converter App powers this tool with a fast, privacy-minded platform used by millions.

    Icon

    Privacy-First Conversion


    Your video is processed in temporary memory and removed automatically after conversion. We do not store or inspect your content.

    User reviews

    Users rely on our AVI to MP4 converter to easily play older video files on modern devices and media players.

    Discover why thousands of users choose Converter App. Read verified Trustpilot reviews from people turning AVI video files into widely compatible MP4s daily.

    4.8
    Based on the 407 reviews
    Collected after conversion

    The best converter u can find. Most sites doesnt allow morethan 2GB for free and but this sites allow and the video quality is the same

    money hunt Mar 24, 2026

    Wow great, FINALLY a good website that doesn't have some size/duration limit, or that "we'll convert it only if it takes us less than 5 minutes" stuff... No chance to convert any 500+ Mb/20minutes file with those rules. Great service, no quality loss, perfect! Will use again!

    Luca Pirilli Aug 31, 2024

    It allows you to convert large video files (>100Mb) for free unlike other sites. This is also the only tool I have found that will make MPEG files that are compatible with Windows NT 3.51 (Yes, I'm a nerd for vintage PCs). Service is perfect as it is. 10/10 Would use again.

    BigCJ Feb 27, 2024

    Converter.app converted my files quickly and efficiently, after three other sites failed to do so. Great service, highly recommended.

    Rodger Parks May 21, 2024

    Fantastic and free service with no size limit, unlike other converters. Conversion doesn't affect quality and is always done in good time. Amazing service in comparison to competitors who charge fees!

    David Feb 8, 2026

    Further Converters for AVI and MP4

    Convert from AVI

    With Converter App, you can convert AVI files into many other formats:

    All AVI Converters →

    More for MP4s

    If you want to keep working with your final MP4, try:

    All MP4 Converters →

    AVI to MP4 converter quality rating

    + + + + + 4.8 / 5   (based on  407  reviews )

    You can submit your review after uploading and editing at least one file!