Why does my video have no sound?
A video with visuals but no sound is almost always a conversion or codec problem, not a genuinely silent recording — unless the original truly had no audio to begin with.
First, check the original
Play the source file before any conversion to confirm it actually has sound. If it does, the issue happened during conversion.
The fix
Re-convert from the original file using a converter that outputs standard MP4 with AAC audio, which plays on virtually every device. For MOV files specifically, MOV to MP4 is built to carry audio through reliably.
A useful clue
If the converted file is unusually small compared to the original, the audio track may have been dropped entirely during conversion — that size difference is worth checking before assuming the fix worked.
A related but different problem
If audio is present but noticeably out of sync with the video rather than missing entirely, that is usually a frame-rate mismatch from conversion rather than a missing audio track — re-converting from the original source with consistent settings is the standard fix for that case too.
Preventing this on future conversions
Always keep the original file until you've confirmed a conversion worked correctly, including checking the sound — deleting the source too early is the main reason this becomes a real problem rather than a two-minute fix.
Testing the fix worked
After re-converting, always play back the result with sound on before sharing it onward or deleting the source file — confirming the fix worked takes seconds and avoids sending a silent video a second time.
Related help articles
This is one of the more frustrating problems to discover after the fact — building a habit of checking sound immediately after any conversion, rather than assuming it worked, saves having to redo the whole process later once you have already shared or deleted the source.