MP4 to AVI
Converts MP4 files to AVI format — universal video playback on any device to legacy video compatibility. All conversion happens locally in your browser with no file size limits.
Runs on FFmpeg
How to Use the MP4 to AVI
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Frequently Asked Questions
Why convert MP4 to AVI?
MP4 (MPEG-4 Part 14) uses lossy compressed encoding and is best for universal video playback on any device — phones, smart TVs, web browsers, and social media. AVI (Audio Video Interleave) uses uncompressed or lossy encoding and excels at legacy video compatibility — older software, embedded systems, and archival playback. Converting between them lets you take advantage of each format's strengths — for example, using a compressed format for sharing and a lossless format for editing. All conversion happens locally in your browser with no file size limits.
What video codecs does the AVI output use?
The converter typically outputs AVI with MJPEG or MPEG-4 codecs. Choose the codec based on your compatibility needs — MJPEG is most widely supported but produces larger files.
Will the quality change?
If re-encoding occurs, quality depends on the chosen bitrate and codec. Selecting high quality settings preserves visual fidelity. Direct stream copy (no re-encode) is possible if codecs are compatible.
When using MP4 to AVI, what is the maximum file size?
Videos up to 250MB are supported for everyone. Larger files may cause memory issues in the browser. For very long videos, consider trimming first.
Is MP4 to AVI conversion done locally?
Yes. All conversion runs in your browser using FFmpeg WASM. No video files are uploaded to any server.
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Last updated October 2026