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AVI to MP4Converter — Fast & Free Online

Convert legacy AVI videos to modern MP4 format for better compression and universal compatibility.

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Fast Conversion
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Convert AVI to MP4 Now

Source
Drag and drop files here or click to browse

Drop your file here, or click to browse

Supports all major formats

Up to 50 MB (free)BATCH SUPPORT
1CONVERTER Media Team - 1CONVERTER Team Logo
1CONVERTER Media Team·Audio & Video Specialists·
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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.

How to Convert AVI to MP4

Follow these simple steps to convert your AVI files to MP4 format in seconds

1

Step 1

Upload your AVI video file

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2

Step 2

Select MP4 as output format

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3

Step 3

Choose quality preset

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4

Step 4

Click "Convert"

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5

Step 5

Download your MP4 video

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Average conversion time: Less than 2 minutes

Visual Conversion Preview

avi

Source file

Size:2.4 MB
Format:AVI
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Converting...

mp4

Output file

Size:1.0 MB
Saved:-60%
60%
Size Reduction

This visualization shows the typical conversion process from AVI to MP4 format, including expected size reduction and quality retention.

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Choose Your Conversion Quality

Select the perfect balance between quality and file size for your AVI to MP4 conversion

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Low Quality

Smallest file, basic quality

File Size:Very Small
Speed:Very Fast
Quality Level
Recommended
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Medium Quality

Balanced size and quality

File Size:Medium
Speed:Fast
Quality Level
target

High Quality

Larger file, great quality

File Size:Large
Speed:Moderate
Quality Level
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Maximum Quality

Largest file, best possible quality

File Size:Very Large
Speed:Slow
Quality Level

tips_and_updatesQuality Selection Tips

When to use Low/Medium:

  • •Web uploads and social media sharing
  • •Email attachments with size limits
  • •Quick previews and thumbnails

When to use High/Maximum:

  • •Professional printing and publishing
  • •Archive and long-term storage
  • •When quality is more important than size

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

Why Convert AVI to MP4?

Discover the advantages of converting your AVI files to MP4 format

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Smaller file size

MP4 is 50-70% smaller than AVI

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Better quality

Modern compression technology

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Universal compatibility

Play on all modern devices

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Streaming optimized

Perfect for online video

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Edit-friendly

Works with all video editors

Additional Features

169+
Supported Formats
<2 min
Average Time
24/7
Available
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Popular Use Cases

See how professionals use our AVI to MP4 converter in real-world scenarios

1

Modernizing old video collections

Convert AVI to MP4 for this purpose quickly and easily.

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2

Reducing storage usage

Convert AVI to MP4 for this purpose quickly and easily.

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3

Uploading videos to social media

Convert AVI to MP4 for this purpose quickly and easily.

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4

Playing on mobile devices

Convert AVI to MP4 for this purpose quickly and easily.

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5

Streaming videos online

Convert AVI to MP4 for this purpose quickly and easily.

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Trusted by Professionals In

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Web Development
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AVI vs MP4

AVI → MP4

Source Format

AVI

Quality:good
File Size:large
Compatibility:wide

checkAdvantages

  • checkWide support
  • checkGood quality

closeDisadvantages

  • closeVery large files
  • closeOutdated format
Target Format

MP4

Quality:excellent
File Size:medium
Compatibility:universal

checkAdvantages

  • checkBest compatibility
  • checkGood compression
  • checkHD support

closeDisadvantages

  • closeLossy compression
  • closeCan be large for HD

AVI → MP4

MP4 offers higher quality than AVI and runs on every major platform. Convert your existing AVI files when the target application, platform, or workflow requires MP4.

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Frequently Asked Questions

Everything you need to know about converting AVI to MP4

AVI is an old format that often uses minimal compression. MP4 uses modern codecs (H.264/H.265) for much better compression.
With proper encoding settings, quality loss is minimal while achieving significant file size reduction.
Typically 50-70% smaller. A 1GB AVI might become 300-500MB MP4 with similar or better visual quality.

Still Have Questions?

Our support team is here to help you with any questions about AVI to MP4 conversion.

Contact SupportView All FAQs
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