🔇Silence Trimmer
Automatically find and remove the silent parts of a recording. Watch the waveform while you adjust the threshold — no AI, all in your browser.
Your audio is never sent to a server (processed in your browser)
How to use
- Choose the audio file you want to trim — the waveform appears with silent sections shown in red.
- Adjust "Silence threshold", "Min. silence length", and "Padding" while watching the waveform.
- Press "Trim silence & save as MP3" to download the result. If you'll edit it further in a video or audio editor, use "Save as WAV" instead.
No AI — just a volume calculation
This tool splits your audio into short windows (20 milliseconds each), measures the volume of each, and marks any stretch quieter than your threshold — lasting longer than your minimum length — as silence to remove. It doesn't recognize speech or language, so it works the same regardless of what's being said.
Setting "Min. silence length" too short can choppily cut natural pauses between words. Keeping some "Padding" avoids abrupt starts or cutoffs right at the edit points.
Handy for
- Tightening up long pauses in a voice memo or recording before editing
- Trimming dead air from podcast or narration source audio
- Compressing a long meeting recording down to just the parts with speech
FAQ
Is my audio uploaded to a server?
No. Analysis, trimming, and saving all happen entirely in your browser.
Should I save as MP3 or WAV?
MP3 is best for sharing, storing and playing on your phone (about 1 MB per minute at 128 kbps). WAV is uncompressed with no quality loss, which suits video and audio editors, but it takes about 10 MB per minute in stereo. Note that MP3 can add a tiny bit of silence at the very start because of how the format works. To convert to other formats such as M4A or FLAC, use the
Audio Format Converter.
Speech sounds choppy between words.
Try increasing "Min. silence length" or "Padding." For speech with frequent breathing pauses, setting the minimum silence length to 0.5s or more usually sounds more natural.
Does it work on audio with background music?
Background music registers as volume too, making silence harder to detect while it plays. This works best on narration with little background noise.