Nouplo

Split audio at silences

One long recording in, a file for every stretch of sound out.

Drop files here

or click to choose from your deviceAccepted: MP3, M4A, AAC, WAV, OGG, OGA, OPUS, FLAC, WEBA, MP4, M4V, MOV

One file per runUp to 20 MB per file5 runs per dayRemove limits with Pro✓ Works offline

Your files stay on your device

This tool runs entirely in your browser. Nothing is uploaded, nothing is stored, and you can even turn off your internet connection before you start.

Example

Worked example — Split audio at silences

Use the following inputs and settings.

Item Value
Input silence.wav · 4 s · 1.3–2.7 s = 0
Save as WAV — uncompressed, no quality lost
Silence long enough to split at 0.5 seconds
Leave at each end Nothing
Output files 2
Output silence-1.wav
Output 1.30 s
Output silence-2.wav
Output 1.30 s

Expected result — Output files: 2.

How it works

  1. Add the recording — a long MP3, WAV or FLAC, or a video whose sound you want cut up.
  2. Set how long a gap has to be before it counts as a break. Two seconds suits songs; half a second suits speech.
  3. Every piece is kept by default, even a one-word answer. To keep a cough or a chair scraping from becoming a track of its own, throw away pieces shorter than 1 second.
  4. Download the pieces, numbered in order.

Frequently asked questions

How is this different from cutting the silence out?
The silence cutter joins what is left into one shorter file. This writes each stretch out as a file of its own, numbered in order, and leaves the gaps where they were.
It split in the middle of a sentence. What should I change?
Raise the length of silence needed — a speaker pausing for breath is often quiet for a second. Lowering the threshold to −50 dB also helps in a quiet room.
How many pieces can it make?
Up to two hundred from one file. If you are getting hundreds, the gap setting is too short for the material.
Is my recording uploaded?
No. It is decoded, split and re-encoded in your browser.

Related tools

⏸ Remove silence The pauses between sentences, cut out automatically, with the joins smoothed so there are no clicks. ✂ Trim audio Keep the part you want. Unlike video, the cut lands exactly where you put it. ♪ Merge audio Several recordings, one file, in the order you set. ❝ Japanese speech to text Japanese recordings and videos into a transcript and SRT subtitles, without the audio leaving your device.