Convert AVI to MP4 in Seconds

Got an AVI that won't play on your phone or upload to YouTube? Cacao Docs converts it to MP4 instantly — free, private, zero installs.

User avatarUser avatarUser avatar
1.5M users
17,150 reviews

How It Works

AVI to MP4 Converter — Convert AVI Video Files to MP4 Online Free | Cacao Docs
1
Upload Your AVI. Drag your AVI file into Cacao Docs or click to browse. Old home videos, downloaded clips, legacy recordings — any AVI works.
2
Cacao Docs Converts It. Our engine converts your AVI into a clean, modern MP4 in seconds. High quality, fast, no settings to mess with.
3
Download Your MP4. Grab your MP4 and you're done. Plays on any phone, Smart TV, browser, or video editor — no more compatibility headaches.

Your Complete Audio & Video Toolkit

Transcribe, convert, extract — everything audio & video, handled in one place.

AI Transcription

Speech to text with speaker labels, timestamps, and 95%+ accuracy.

Format Conversion

MP3, WAV, M4A, OGG, FLAC — convert any audio or video format instantly.

Video to Audio

Extract audio from MP4, YouTube, Zoom recordings, and more.

Lightning Fast

Most files processed in under three minutes. No waiting around.

No Signup
Start instantly
100% Secure
Auto-deleted
Browser-Based
No installs

People Love These Tools

Podcasters, researchers, marketers, and remote teams use our audio & video tools every day.

Feb 15
Finally got my old home videos on my phone
Had years of family videos stuck in AVI that nothing would play. Cacao Docs converted them all to MP4 and now they're on my phone and backed up to the cloud. Priceless.
Sandra MüllerInstagram logo
Sandra Müller
Feb 3
YouTube stopped rejecting my uploads
Was uploading AVI files to YouTube and kept getting format errors. Cacao Docs converted them to MP4 and everything went through first try. Should've done this ages ago.
Kwame AsanteInstagram logo
Kwame Asante
Jan 26
Fast, clean, no watermarks
Converted a big batch of old AVI clips in one session. Cacao Docs was fast, the quality held up perfectly, and there was no watermark or sign-up wall. Exactly what I needed.
Tara LindqvistInstagram logo
Tara Lindqvist
824 people converted files today
Loading...

Trusted and Secured by Industry Experts

trusted by imagetrusted by imagetrusted by imagetrusted by imagetrusted by image

Why People Pick Our Audio & Video Tools

Works on Everything Now

AVI is old-school — great in its day, but phones, streaming platforms, and modern editors often choke on it. MP4 is the universal standard. Cacao Docs gets you there in one click.

Quality Stays Sharp

Cacao Docs converts your AVI to MP4 while keeping the video and audio quality as close to the original as possible. No blurry output, no weird artifacts.

Upload to YouTube & Social

YouTube, Instagram, TikTok — they all prefer MP4. Cacao Docs converts your AVI so you can upload straight away without any format rejection nonsense.

Batch Convert the Whole Archive

Got a folder full of old AVI files to modernize? Cacao Docs lets you queue them up and convert back to back. No repetitive uploading, no wasted time.

Transcribe the Audio After

Once you have your MP4, run it through Cacao Docs AI transcription to pull out subtitles, captions, or a full text transcript. One platform, full workflow.

Encrypted & Auto-Deleted

Your video is locked with encryption on upload and wiped from Cacao Docs servers the second conversion is done. Zero data stored, zero risk.

Works on Everything Now

AVI is old-school — great in its day, but phones, streaming platforms, and modern editors often choke on it. MP4 is the universal standard. Cacao Docs gets you there in one click.

Quality Stays Sharp

Cacao Docs converts your AVI to MP4 while keeping the video and audio quality as close to the original as possible. No blurry output, no weird artifacts.

Upload to YouTube & Social

YouTube, Instagram, TikTok — they all prefer MP4. Cacao Docs converts your AVI so you can upload straight away without any format rejection nonsense.

Batch Convert the Whole Archive

Got a folder full of old AVI files to modernize? Cacao Docs lets you queue them up and convert back to back. No repetitive uploading, no wasted time.

Transcribe the Audio After

Once you have your MP4, run it through Cacao Docs AI transcription to pull out subtitles, captions, or a full text transcript. One platform, full workflow.

Encrypted & Auto-Deleted

Your video is locked with encryption on upload and wiped from Cacao Docs servers the second conversion is done. Zero data stored, zero risk.

AVI to MP4 Online

No signup needed. Just pick a tool and go.

Convert AVI to MP4
4.6
1,340 reviews
4.5
13,920 reviews
4.6
4,550 reviews

Frequently Asked Questions

Quick answers about our audio & video transcription and conversion tools.

Related articles

Explore more tips, tools and guides to help you work smarter with PDFs.

How to Extract and Copy Text from PDF Documents - Complete Guide
How To

Jul 25, 2025 | 7,531 views

How to Extract and Copy Text from PDF Documents - Complete Guide

Discover multiple methods to copy text from PDFs, including solutions for scanned documents and image-based files. Learn OCR techniques, troubleshooting tips, and free tools.

How to Convert a PPTX to PDF Online: Complete Guide
How To

Sep 19, 2025 | 8,293 views

How to Convert a PPTX to PDF Online: Complete Guide

Master the art of converting PowerPoint presentations to PDF format online. Discover professional methods, optimization techniques, and expert tips for seamless document sharing and preservation.

How to Combine Multiple Files into One PDF Document - Complete Guide
How To

Sep 15, 2025 | 15,234 views

How to Combine Multiple Files into One PDF Document - Complete Guide

Learn how to merge multiple PDF files, documents, and images into a single organized PDF document. Discover professional techniques for combining files efficiently with perfect formatting and order.

AVI to MP4 Converter — Convert AVI Video Files to MP4 Online Free | Cacao Docs - Cacao Docs