NoInstall.Tools

AVI to MP4 Converter

Turn your AVI videos into MP4, right in your browser — no upload, no signup.

About AVI to MP4 Converter

AVI to MP4 Converter modernizes an old .avi file into MP4, the format today's phones, streaming services and social platforms actually expect. AVI was common years ago but a lot of modern apps and devices no longer play it well, or at all — this brings an old recording or archived clip back to something you can share, upload or watch anywhere. Add your AVI files, click convert, and download an .mp4 that plays everywhere — everything happens right here in your browser, so your footage is never sent to a server.

How to convert AVI to MP4

  1. 1

    Add your AVIs

    Drag and drop your .avi files, or click to browse. You can add several at once.

  2. 2

    Convert

    Click Convert — this pair usually just repackages the file, so it's typically done in seconds.

  3. 3

    Download

    Save each .mp4 file individually, or download every converted file at once as a .zip.

Why use NoInstallTools

Private by design

Your videos are processed locally and never leave your device.

No install, no signup

Works straight in your browser — no software, no account, no email.

Plays everywhere

MP4 is the one format that's safe to assume any phone, app or editor will open.

Free, always

Convert as many videos as you like, with no limits or hidden fees.

Related tools

MP4 to AVI Converter

Turn your MP4 videos into AVI, right in your browser — no upload, no signup.

Video Converter

Change your video's format in seconds, right in your browser — no upload, no signup.

AVI Compressor

Shrink AVI videos in seconds, right in your browser — no upload, no signup.

MP4 Compressor

Shrink MP4 videos in seconds, right in your browser — no upload, no signup.

FAQ

Why convert AVI to MP4?
AVI is an older format that a lot of modern phones, browsers and social platforms don't handle well. Converting to MP4 brings an old file up to date so it plays and uploads without trouble.
Will converting to MP4 lose quality?
Usually not — AVI and MP4 can wrap the same underlying video, so this conversion typically just repackages the file instead of re-encoding it. If your file needs a real re-encode, there may be a very small, usually unnoticeable quality change.
Are my videos uploaded anywhere?
No. Conversion happens entirely on your device, inside your browser — your files never get sent anywhere.
Is there a file size limit?
Each file can be up to 300MB, and up to 5 files per batch, to keep things reliable in the browser.