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First run downloads FFmpeg (~25 MB) once in this browser. DRM-protected iTunes videos cannot be converted. Need MOV instead? Try /mov-to-mp4.

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M4V to MP4 converter online free

Convert M4V to MP4 online free in your browser. Turn Apple .m4v videos into H.264 MP4 with adjustable quality — no server upload required.

What is an M4V to MP4 converter?

An M4V to MP4 converter turns Apple M4V videos (.m4v) into standard MP4 for wider playback on Windows, Android, editors, and social apps. People search convert M4V to MP4, .m4v to mp4, or M4V to MP4 converter when a player rejects M4V. This free tool runs locally with FFmpeg WebAssembly — no server upload.

M4V to MP4 converter features

Browser-based M4V to MP4 conversion with privacy-first processing.

  • Convert M4V to MP4 online

    Upload a .m4v file and download a compatible MP4 in your browser.

  • Apple M4V support

    Works with common iTunes / QuickTime-style M4V exports (non-DRM).

  • Adjustable output quality

    Tune H.264 CRF to balance visual quality and MP4 file size.

  • No server upload

    FFmpeg WebAssembly processes video on your device for better privacy.

  • Web-ready MP4

    Output uses H.264, optional AAC, and faststart for broad playback.

How to convert M4V to MP4 online

Convert an M4V file to MP4 in three steps.

  1. Upload M4V file

    Drop or select your .m4v video (up to 200 MB).

  2. Set quality (CRF)

    Keep the default CRF 23 for balanced quality, or lower CRF for sharper output.

  3. Convert and download

    Click Convert to MP4, then download the result.

Great for

Common M4V to MP4 conversion scenarios.

  • Cross-platform playback

    Play converted MP4 on Windows, Android, and non-Apple devices.

  • Editors and uploads

    Import MP4 into NLEs and social apps that prefer MP4 over M4V.

  • Sharing by email or chat

    Create MP4 files recipients can open without iTunes or QuickTime.

  • Library cleanup

    Standardize M4V clips into everyday MP4.

Frequently Asked Questions

Quick answers about this tool—open a question to read more.