MP4 → MP4
Fix Video Compatibility
Fix video playback issues for iPhone, Android, and other devices in your browser, without uploads or watermarks.
Drop your file here or click to browse
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Normalizes perceived loudness to broadcast standard (-16 LUFS). No settings needed.
Automatically detects and removes letterbox black bars from all sides.
Drop a video file to view its codec, resolution, duration, and file size.
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Your files never leave your browser
Frequently asked questions
What does this tool fix?
Re-encodes video to H.264 MP4, the most universally compatible format for phones, tablets, and computers.
Are my files uploaded?
No. Everything runs locally in your browser. Your files never leave your device.
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