Long pauses make a voice memo, podcast, lecture or voice-over drag. This page finds every stretch quieter than the threshold for longer than you set, shows it shaded on the waveform, and cuts it out, leaving a little padding at each side so the speech still sounds natural. You see the length before and after, can listen to the result, and save it as MP3 or WAV.
The same gaps can split a long recording instead: a side of an LP or a cassette digitised in one go becomes separate tracks, cut at the silences between songs, saved together in a ZIP with a cue sheet. The tracks are cut from your original file by the site's FFmpeg in one pass, as the CUE Splitter does, so FLAC and WAV keep the full quality. It is free to use, with no account and no upload limit, and it runs entirely in your browser: nothing is uploaded, and while the page stays open, a feature you have already used keeps working offline.
- What threshold should I use?
- The page starts from one worked out from your recording: a little above its quietest parts. For a clean voice recording -45 to -35 dB works; for a noisy room or tape hiss, raise it towards -30 dB so the noise counts as silence. If quiet words are being cut, lower it.
- Will it cut off the starts and ends of words?
- Not with some padding: by default 0.15 seconds is kept at each side of every cut, and each join is faded over a few milliseconds so it does not click. Raise the padding for a more relaxed pace, or lower it for a tighter edit.
- How do I split a digitised LP or cassette into tracks?
- Choose Split into tracks. The gaps between songs are found from the shortest gap you set (2 seconds to start with); a piece shorter than the shortest track joins the one before, so a quiet passage inside a song does not start a new track. Check the numbered marks on the waveform, then save the tracks. Songs that run into each other with no silence cannot be found this way; use a cue sheet with the times in the CUE Splitter instead.
- What is the cue sheet for?
- A cue sheet is a small text file listing where each track starts in the original recording. Players such as foobar2000, and CD burning programs, use it to treat one long file as separate tracks without cutting it.
- Is there a length limit?
- Removing silence takes recordings of up to 3 hours, cut a piece at a time as the sound is decoded, so a long one does not fill the memory; a file in a format the browser cannot decode piece by piece is decoded whole instead, for up to an hour. Splitting into tracks takes up to 6 hours: it only measures the loudness to find the gaps, and FFmpeg cuts the tracks from the original.
- Is my recording uploaded?
- No. The recording is read, cut and saved in this browser tab on your device; the MP3 encoder and the FFmpeg that cuts tracks are downloaded from this site the first time they are needed.