AVI to MP4

Upload a AVI file and download it as MP4. Free to start.

Drop files here, or press Enter to choose them. Up to 50 MB per file.
Drop a AVI file hereFree · up to 50 MB · 10 operations in total without an account · or paste with Ctrl+V
  • Sent over HTTPS · link expires in 24 h

What changes

AVI and MP4 side by side: quality, size and where each one opens.

AVI vs MP4

AVI vs MP4
PropertyAVIMP4
QualityGoodExcellent
File sizeLargeMedium
CompatibilityWidely supportedOpens everywhere
Advantages
  • Good quality
  • Good compression
  • HD and 4K video
Disadvantages
  • Very large files
  • Dated format
  • Lossy compression
  • HD files get large

MP4 keeps more detail than AVI. MP4 opens on every major platform. Convert AVI files when the app, site or workflow you use needs MP4.

How it works

  1. Step 1:

    Drop the AVI file on the orange block above, or press “Choose AVI”.

  2. Step 2:

    Press “Convert to MP4”. The block shows the progress while the server converts the file.

  3. Step 3:

    Press “Download” to save the MP4 file. On Free the link works for 24 hours.

How AVI to MP4 conversion works

Audio Video Interleave (AVI) interleaves audio and video streams in a Microsoft container format that supports many codecs but lacks modern streaming features. MPEG-4 Part 14 Video (MP4) packages H.264 or H.265 video with AAC audio in a container format widely supported across every platform and device. This conversion changes the file's encoding, compression method, and supported feature set. When the source codecs already match the target container the streams are copied without re-encoding (zero quality loss); otherwise the video is re-encoded at a configurable quality. The result is a standard MP4 file readable by any compatible application. 1converter handles AVI-to-MP4 conversion server-side: files are uploaded over HTTPS, processed on isolated cloud infrastructure, and the converted output is available for download for 24 hours before automatic deletion. No account is required for standard conversions.

Quality levels for AVI → MP4

LevelFile sizeSpeed
Low qualitySmallest file, basic qualityVery smallVery fast
Medium qualityRecommendedBalanced size and qualityMediumFast
High qualityLarger file, great qualityLargeModerate
Maximum qualityLargest file, best possible qualityVery largeSlow

Video Tip: Medium quality is ideal for web streaming. Use High or Maximum for videos you plan to edit further or archive.

When to convert

What the MP4 file is good for and why people convert to it.

  • Smaller filesModern codecs such as H.264 compress far better than most AVI codecs
  • Better qualityModern compression technology
  • Modernizing old video collections
  • Reducing storage usage

Where your file goes

  • It travels to our server over an encrypted HTTPS connection and is converted there.
  • The MP4 file comes back as a private link. It stops working after 24 hours on Free and 7 days on paid plans, and then the files are deleted.

Questions and answers

What people ask before converting AVI to MP4.

Why is my AVI file so large?
AVI is an old format that often uses minimal compression. MP4 uses modern codecs (H.264/H.265) for much better compression.
Will I lose quality?
With proper encoding settings, quality loss is minimal while achieving significant file size reduction.
How much smaller will my file be?
It depends on the codec inside the AVI. Old codecs such as DivX or uncompressed video usually shrink a lot as H.264 MP4; an AVI that already uses H.264 changes little. You see the real size before you download.

More about this pair

Many files at once? Starter converts 5 at a time, 100 a day.

See plans