Are audio files uploaded?

No. ffmpeg.wasm runs in your browser, so neither the input nor the processed output ever leaves your device.

How do I pick the threshold?

Around -40 to -50 dB works for clean studio recordings; -30 to -35 dB is better for noisier outdoor recordings. The audio-volume tool's waveform preview can help eyeball levels first.

Does it cut silence in the middle too?

No — this tool only targets the leading and trailing silence. Pauses between speech are preserved.

Nothing was trimmed even though the file has silence

Set the minimum silence length to 0.1–0.3s to catch short pauses, or to 1.0s+ if you only want to remove longer dead air.

What's the output format?

Same as the input — the file's extension is reused, so M4A / AAC stay as AAC and so on.

Back to Audio

Trim silence from audio — auto-cut leading and trailing silence (ffmpeg.wasm)

Automatically trim the leading and trailing silence from MP3 / WAV / M4A / AAC / OGG / OPUS / FLAC files using ffmpeg.wasm's silenceremove filter. Great for removing dead air at the start of recordings, the awkward pause before a talk, or an unnecessarily long fade-out at the end of a podcast. Tweak the threshold (dB) and minimum silence length (seconds) and choose which side(s) to trim. Batch process and grab a single ZIP. Files never leave your device — every step runs in the browser.

audioextract

How to use

Drop or pick audio files (MP3 / WAV / M4A / AAC / OGG / OPUS / FLAC, batch supported). Adjust the trim side (both / leading / trailing), silence threshold (dB), and minimum silence length (s) if needed, then click Trim silence — ffmpeg.wasm's silenceremove filter runs locally. Download individually or as a ZIP.

FAQ

Are audio files uploaded?: No. ffmpeg.wasm runs in your browser, so neither the input nor the processed output ever leaves your device.
How do I pick the threshold?: Around -40 to -50 dB works for clean studio recordings; -30 to -35 dB is better for noisier outdoor recordings. The audio-volume tool's waveform preview can help eyeball levels first.
Does it cut silence in the middle too?: No — this tool only targets the leading and trailing silence. Pauses between speech are preserved.
Nothing was trimmed even though the file has silence: Set the minimum silence length to 0.1–0.3s to catch short pauses, or to 1.0s+ if you only want to remove longer dead air.
What's the output format?: Same as the input — the file's extension is reused, so M4A / AAC stay as AAC and so on.

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