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AVI to MP4 Converter

Give your older video files a modern format that plays everywhere

Size up to 100 MB
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By uploading a file, you agree to our Terms of Use and acknowledge our Privacy Policy

How to convert AVI to MP4

  • download PDF Drag & drop your AVI file or click the + button to upload it;
  • create PDF Wait a few seconds while our tool converts your video;
  • upload pdf file Download your MP4 file. It’s also saved to your account.

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Why choose our AVI to MP4 converter

  • benefit 1

    Plays on every device

    MP4 is the universal video format. Converting your AVI files to MP4 means they’ll play on phones, tablets, smart TVs, and every major media player.
  • benefit 2

    Smaller file size

    AVI files tend to be large because the format uses older compression. MP4 delivers similar visual quality at a fraction of the file size.
  • benefit 3

    Fully automatic

    Upload your AVI file and the conversion starts on its own. You don’t need to configure anything — the tool picks the best settings for you.
  • benefit 3

    Preserves video quality

    Our converter re-encodes your video carefully, so the MP4 output looks sharp and faithful to the original AVI recording.
  • benefit 1

    Works on any device

    Since our tool runs online, you can convert avi file to mp4 on Windows, Mac, Linux, iOS, or Android without installing any software.
  • benefit 2

    Cloud storage

    Every converted file is automatically saved to your PDF Guru account, so you can download or share it anytime from anywhere.

The simplest way to convert AVI to MP4

AVI was once the go-to video format, but it’s showing its age. Many modern devices and platforms struggle to play AVI files, and the format’s older compression produces unnecessarily large files. When you need to convert an AVI to an MP4, our converter does the work for you — upload your file, and the tool delivers a clean MP4 automatically. Converting avi to mp4 gives you a smaller, more portable video that’s ready for sharing, streaming, or uploading to any platform.

What users are saying about our online tool

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44,076 reviews

Convert your AVI videos to MP4 today

Frequently asked questions

  • Can you convert AVI to MP4?

    Yes. Our online converter takes your AVI file and re-encodes it as an MP4. The process is fully automatic — you upload the file, and our tool handles the video and audio conversion without any manual setup. The resulting MP4 file plays on virtually every modern device and platform.

  • How to convert AVI to MP4 without losing quality?

    Our converter uses high-quality encoding settings to minimize any visual difference between your original AVI and the converted MP4. While some re-encoding is necessary to change formats, the output is carefully optimized so the quality loss is imperceptible to the human eye. For the best results, start with the highest-quality AVI source you have.

  • How to convert AVI to MP4 on Mac?

    Since our tool runs entirely online, you can convert AVI files on a Mac using any web browser — Safari, Chrome, or Firefox. Just open this page, drag your AVI file into the upload area, and download the converted MP4 when it’s ready. There’s nothing to install and no compatibility issues to worry about.

  • Why change AVI to MP4?

    AVI is an older format that many modern devices and platforms no longer support well. MP4 uses more efficient compression, which means your videos take up less storage space while maintaining strong visual quality. MP4 also plays natively on smartphones, tablets, smart TVs, and social media platforms, making it the safer choice for sharing and streaming.

  • What is the difference between AVI and MP4?

    AVI (Audio Video Interleave) was developed by Microsoft in the early 1990s and uses older compression methods. MP4 is a modern container format that supports H.264 and H.265 video codecs, producing smaller files at comparable quality. MP4 also handles metadata, subtitles, and streaming more effectively than AVI, which is why it’s become the standard video format across devices and platforms.

  • Will converting AVI to MP4 reduce the file size?

    In most cases, yes. MP4 uses more efficient compression than AVI, so the converted file is usually significantly smaller without a noticeable drop in quality. The exact size reduction depends on the codec and settings used in the original AVI, but it’s common to see files shrink by 50% or more after conversion.

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