Silent Audio Adder

Many platforms (Instagram, TikTok) reject or mute videos without an audio track. This tool reads your video's duration and generates a matching silent WAV file using the Web Audio API. Download both files, then mux them with a video editor or ffmpeg.

100% freeNo sign-upRuns in your browserNo upload · data stays private
No file chosen

How to use this tool

  1. Upload your video to detect its duration.
  2. Choose sample rate and channel count.
  3. Click "Generate Silent WAV" to download a perfectly matched silent audio file.
  4. Mux the video and audio with your editor: in FFmpeg: ffmpeg -i video.mp4 -i silent.wav -c:v copy -c:a aac -shortest output.mp4

Why use a silent audio track?

Some social platforms reject "silent" videos (video streams with no audio track at all) or flag them for review. Adding an empty audio track satisfies the container requirement without changing the visual content.

Why it's private

The silent WAV is generated using the Web Audio API — only a buffer of zeros. Your video file is never read in full and never uploaded anywhere.