AVI to MP4

Convert AVI video to MP4 format online. Modernize your video library with universal H.264 MP4 files.

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File is too large. The limit is 100 MB.

Supported: .avi (Max 100 MB)

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info About this tool
Modernize your AVI library by converting to MP4 (H.264/AAC). Smaller size, better compatibility.

File size: MP4 output is typically 20–50% smaller than AVI. Uncompressed or MJPEG AVI files shrink much more dramatically.

Quality: Re-encoding from AVI to H.264 involves one generation of quality loss. Results are excellent for viewing but not lossless. Retain original AVI files for archiving.

format_list_numbered How to convert
  • 1
    Upload AVI file.
  • 2
    Compress to MP4.
  • 3
    Download result.
help FAQ

My AVI uses DivX or Xvid codec: will it convert?

Yes. Our converter handles the most common AVI codecs including DivX, Xvid, MJPEG, and uncompressed AVI.

Will the video quality be maintained?

We transcode at high quality settings. Some quality loss from re-encoding is expected: this is unavoidable when changing codecs. The result is visually excellent for standard viewing.

How much smaller will the MP4 be?

AVI files using older codecs (Xvid, DivX) convert to MP4 at 20–40% smaller size. Uncompressed AVI files can shrink by 90%+ when converted to H.264.

Can I upload the resulting MP4 to YouTube?

Yes. MP4 with H.264/AAC is YouTube's recommended upload format and produces the fastest processing times.
lightbulb Common use cases
  • check_circle Converting a library of old home videos from AVI to MP4 for modern devices
  • check_circle Uploading legacy AVI recordings to YouTube, Instagram, or TikTok
  • check_circle Reducing storage space for large AVI video archives
  • check_circle Making old DVD rips or screen recordings compatible with current phones
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