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Loop audio

Loop a song or sound for free: repeat it a number of times or for up to an hour, with no gap between plays. Nothing is uploaded.

Files stay on your device

Drop an audio file to loop

Repeat a song or sound a number of times, or until it runs an hour, with no gap where it starts again.

MP3, M4A, WAV, FLAC, and other audio, or a video with sound.

How to loop audio

Open an MP3 or any audio file, choose how many times it plays or how long it should run, such as 10 minutes or an hour, and save one longer file. Each play runs straight into the next with no gap, so a beat or ambient sound loops smoothly. It runs in your browser, so the file stays on your device.

  1. Step 1

    Open your audio
    An MP3, WAV, or any sound.

  2. Step 2

    Choose plays or a length
    From 2 plays to an hour or more.

  3. Step 3

    Download the loop
    One file, with no gaps between plays.

What to expect

Supported inputs
MP3, WAV, M4A, AAC, FLAC, OGG, Opus, AIFF, and other audio files, and videos (MP4, MOV, MKV, WebM) with sound.
What happens
The sound is decoded and saved again in its own format (FLAC as WAV), played the number of times you choose; a set length ends partway through the last play.
Limits
A loop sounds seamless only if the recording's end matches its start. A video loops on Loop video, where its packets are copied.

Private by design

Your video stays on your device

Mastershot processes your file locally in this browser. It does not need to be uploaded to a server, and you do not need an account to use the tool.

  • No upload
  • No signup
  • No watermark

Questions

No. The sound is decoded and saved as one stream, so each play starts exactly where the last ended.

Yes. Choose Length and 1 hour, or type any number of minutes.

Yes. It's saved in the same format as the original, except FLAC, which becomes WAV.

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