Remove Silence from Audio

Remove silence from audio in your browser

Pick a recording and the tool strips dead air — leading silence, long pauses in the middle, and trailing silence — using ffmpeg's silenceremove filter, entirely in your browser. A quarter second of every removed gap is kept, so speech keeps its natural rhythm instead of sounding hard-cut.

Worked example

Tighten up a podcast interview: upload interview.mp3 and leave the defaults — Silence threshold -30 dB and Min gap 0.5 seconds. Every pause longer than half a second collapses to a 0.25 s beat, and the result interview-nosilence.mp3 is often 20–40% shorter with no lost words. If a quiet room tone is being kept as "speech", lower the threshold to -40; if breaths are being cut, raise the minimum gap to 1.

How the two knobs interact

• Silence threshold (dB) — how quiet counts as silent. -30 dB suits normal voice recordings; use -40…-50 for quiet/noisy sources so hiss isn't kept as speech. Must be ≤ 0 dB.
• Min gap (seconds) — once the audio has started, only silences at least this long are trimmed; shorter pauses (breaths, beats between sentences) are left untouched. Leading silence before the first sound is always trimmed, whatever its length.

Limits and edge cases

• Input files up to 10 MiB; any format ffmpeg can decode works.
• 0.25 s of each removed gap is kept (fixed) — output is tightened, not robotically gapless.
• Music with intentional quiet passages can get shortened — this tool is meant for speech; raise the minimum gap if you must run it on music.
• A recording with no gaps longer than the minimum comes back (re-encoded but) the same length.
• Output is re-encoded (mp3/ogg at 192 kbps; wav/flac lossless; m4a AAC). Embedded album art is dropped.

FAQ