Why you'd want a video with no sound at all
Muting a video is different from just turning the volume down on playback — it permanently removes the audio track from the file itself, which matters when the destination platform, editing tool, or use case genuinely needs a silent file rather than one that merely plays quietly. Background videos for websites, GIF-replacement autoplay loops, and stock-style footage all commonly need to be silent by design.
It's also the fastest fix for a video that has unwanted audio baked in — background chatter you didn't mean to capture, wind noise that's too distracting to fix, or copyrighted background music that would get a video flagged or blocked on a platform with automated content matching.
Why this doesn't touch video quality at all
Removing an audio track is one of the lightest possible video operations — it's stripping a stream out of a container, not re-encoding the visual frames, so there's no quality trade-off whatsoever on the video side. This is different from most other video edits, which typically involve at least some re-encoding pass that carries a small quality cost.
Because no video re-encoding is needed, muting is also one of the fastest operations available — even a long, high-resolution video mutes in a fraction of the time a compression or format conversion would take.
Muting vs. replacing the audio
If the goal is to remove bad audio and add different audio (background music, a voiceover, corrected dialogue), muting is just the first step — you'll need a separate tool or workflow to layer new audio onto the now-silent video. If the goal is genuinely just silence, muting alone is the complete solution.
It's worth being clear about which you actually need before starting, since a video that's been muted and then needs new audio added is a two-step process, not something a mute tool does on its own.
Platforms where a muted video is specifically required
Many social media autoplay feeds specifically expect and prefer muted video with optional captions, since autoplay-with-sound is broadly considered a poor user experience and many platforms mute by default anyway. Website background videos almost universally need to be silent — an autoplaying video with sound is a near-universal usability complaint. If you're building content specifically for either context, muting at the source rather than relying on the platform to mute it for you gives you more predictable, consistent results.