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AVI to MP4 Converter — Fast & Free | 1converter
  1. Home
  2. AVI to MP4
Popular

AVI to MP4 Converter — Fast & Free Online

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

FromAVIToMP4
Convert AVI to MP4 Now
100% Free
1CONVERTER Media Team - 1CONVERTER Team Logo
1CONVERTER Media Team·Audio & Video Specialists·Updated Mar 15, 2026
Official

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

2

Step 2

Select MP4 as output format

3

Step 3

Choose quality preset

Visual Conversion Preview

avi

Source file

Size:2.4 MB
Format:AVI

Converting...

~2s

mp4

Output file

Choose Your Conversion Quality

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

Low Quality

Smallest file size, faster conversion

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

AVI vs MP4

Compare formats to understand which is best for your needs

Source Format

AVI

Quality:good
File Size:large
Compatibility:wide

Advantages

  • Wide support
  • Good quality

Disadvantages

Why Convert AVI to MP4?

Discover the advantages of converting your AVI files to MP4 format

Smaller file size

MP4 is 50-70% smaller than AVI

Better quality

Modern compression technology

Universal compatibility

Play on all modern devices

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.

2

Reducing storage usage

Convert AVI to MP4 for this purpose quickly and easily.

Related Conversions

Explore other popular file conversion options

MP4AVI

Convert MP4 to AVI

Online MP4 to AVI converter. Fast, free, and secure conversion.

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AVI

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

Streaming optimized

Perfect for online video

Edit-friendly

Works with all video editors

Additional Features

200+
Supported Formats
243+
File Formats
<2 min
Average Time
24/7
Available
3

Uploading videos to social media

Convert AVI to MP4 for this purpose quickly and easily.

4

Playing on mobile devices

Convert AVI to MP4 for this purpose quickly and easily.

5

Streaming videos online

Convert AVI to MP4 for this purpose quickly and easily.

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No Registration
4

Step 4

Click "Convert"

5

Step 5

Download your MP4 video

Average conversion time: Less than 2 minutes

Size:1.0 MB
Saved:-60%
60%
Size Reduction
2s
Processing Time
95%+
Quality Retained

This visualization shows the AVI to MP4 conversion process. A source AVI file of 2.4 MB is converted to MP4 format resulting in 60% file size reduction while retaining 95%+ quality. The conversion takes approximately 2s.

Medium Quality

Balanced quality and size

File Size:Medium
Speed:Fast
Quality Level

High Quality

Better quality, larger files

File Size:Large
Speed:Moderate
Quality Level

Maximum Quality

Best quality, largest files

File Size:Very Large
Speed:Slow
Quality Level

Quality 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.

  • Very large files
  • Outdated format
Target Format

MP4

Quality:excellent
File Size:medium
Compatibility:universal

Advantages

  • Best compatibility
  • Good compression
  • HD support

Disadvantages

  • Lossy compression
  • Can be large for HD

Why Convert AVI to MP4?

Converting from AVI to MP4 helps you leverage the strengths of MP4while working with your existing AVI files. This conversion is ideal when you need better quality.

MKV

Convert AVI to MKV

Online AVI to MKV converter. Fast, free, and secure conversion.

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AVIMOV

Convert AVI to MOV

Online AVI to MOV converter. Fast, free, and secure conversion.

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WMVMP4

Convert WMV to MP4

Online WMV to MP4 converter. Fast, free, and secure conversion.

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MPEGMP4

Convert MPEG to MP4

Online MPEG to MP4 converter. Fast, free, and secure conversion.

Convert Now

Can't Find Your Conversion?

We support 200+ file formats. Browse our complete list of conversions or start converting now!

Start ConvertingView All Formats

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