What this tool decides
- Threshold: -45 dB
- Shortest silence: 0.50 s
- Padding kept: 100 ms
Drop in some audio and these three become sliders. Move any of them and the map of what would be cut, and the resulting length, update straight away — before you commit to anything.
The tightened audio lands here, with the before/after length and how much was cut.
Finds the stretches where nothing is happening and closes them up. Set the threshold, the shortest silence worth cutting and how much padding to keep, then see the before and after lengths, how much came out, and how many gaps were found.
Formats
MP3 / WAV / FLAC and more
Questions
Is my file uploaded?
No. Reading, analysis and export all happen inside the browser. The result leaves only as a download you start yourself; neither the original nor the processed file is sent to a server. Unreleased recordings, internal meetings and interview material you are not free to share are all fine to run through it.
How long a file can it handle?
Up to about an hour is usually comfortable. The size ceiling is 200 MB, and anything larger is refused as you load it. Long files take a while to analyse, but progress is reported as a percentage rather than leaving the page apparently frozen. Note that the audio is expanded into memory to be examined, so on a modest device even a file under the limit can feel heavy — split it first if so.
The output file is bigger than the original
That happens when you save as WAV. WAV is uncompressed, so exporting a compressed source such as an MP3 grows the file even though the duration shrank; stereo WAV runs to roughly 10 MB a minute. Choose MP3 to keep the size comparable. If you plan to keep editing afterwards, though, staying with WAV avoids a second round of lossy compression.
Can it also raise the level or reduce noise?
No — this one only shortens the timeline. Level and tone belong to the mastering tool, separating vocals from backing to the stem separator, loudness measurement to the key & BPM analyser, key and tempo to the key & tempo changer, and format conversion to the file converter. The intended flow is to close the gaps here, save as WAV, and take that to whichever page does the next job. To make the recording in the first place, there is a voice recorder page.
Can I see where the cuts were made?
Yes. Below the figures, the whole file is drawn as a single strip: left edge is the start, right edge the end, and the shaded areas are what came out. Seeing whether the silence was all at the front or scattered throughout is what tells you which setting to adjust. The preview player underneath lets you hear the result directly.