Convert MP4 to AVI Online — No Upload, No Watermark
AVI is the legacy Microsoft container required by some older editors, projectors, and CCTV/DVR systems. Converting MP4 to AVI gives you back-compat without losing the source file.
Drag & drop your video here, or click to browse
Max file size: ~2 GB (memory permitting)
Why convert MP4 to AVI here?
- Older NLEs (Windows Movie Maker, Pinnacle Studio 12, legacy Avid) only accept AVI.
- Some industrial / surveillance hardware demands AVI ingest.
- H.264-in-AVI is widely supported; conversion is fast (no re-encoding required for most clips).
FAQ
Is this MP4 to AVI converter really free and without upload?
Yes. The tool runs entirely in your browser using FFmpeg compiled to WebAssembly. Your MP4 file never leaves your device — open the DevTools Network tab to verify zero uploads. No signup, no watermark, no size cap beyond browser memory (~2 GB).
Will converting MP4 to AVI reduce quality?
The converter re-encodes to AVI with CRF 23 (visually lossless for most footage). If you need stream-copy instead (no re-encoding), use the Converter tool directly and toggle the codec-copy option.
How long does MP4 to AVI conversion take?
On an M2 MacBook, a 1-minute 1080p clip converts in about 8 seconds. 4K clips scale roughly linearly. Old machines are slower — processing uses your CPU and GPU, not our servers.
Can I batch-convert multiple MP4 files?
Not yet — the current flow converts one file at a time. Queue multiple tabs if you need parallel conversion.