AVI to MP4 Converter — Free Online, In Your Browser
AVI is an old Windows format that modern phones and browsers often refuse to play. Convert your AVI files to MP4 (H.264 + AAC), the format that plays on every phone, browser, TV, and social app. The conversion runs entirely in your browser — no uploads, no watermarks, no sign-up.
AVI to MP4 Converter
Turn old AVI files into universal MP4 — free, private, in your browser.
100% Free Forever
No Sign-up
No Credit Card
Private — files never leave your browser
Unlimited Use
1 Add your AVI file
Drag & drop your AVI here
or click to browse — one video at a time
2 Quality settings
Lower CRF = better quality, bigger file. 23 is the sweet spot.
Uncheck to produce a silent video.
3 Convert & download
Working…
✅ Done — your MP4 video
How it works
- Step 1 — Drop in your AVI file. A video engine loads once in the background (~9 MB, then cached).
- Step 2 — Pick a quality preset or set CRF yourself; choose whether to keep the audio track.
- Step 3 — The video is re-encoded to H.264 + AAC MP4 locally with faststart (for web streaming) and downloads to your device.
Everyday uses
- Archive diggers — rescue old AVI files from hard drives and DVDs so modern devices can play them.
- Windows users — turn AVI screen captures and camera dumps into shareable MP4.
- Creators — convert legacy footage for YouTube, Instagram, and WhatsApp.
- Families — make old home videos playable on phones and smart TVs.
Rule of thumb: CRF 23 gives transparent quality for most AVI sources — many old AVIs are already low quality, so 28 saves space without visible loss.