Trim Leading & Trailing Silence

Trim the dead air at the ends without touching the middle

Upload a voice memo, podcast segment, interview, or narration take and this tool removes only the silence at the very start and end of the file. Every pause inside the recording — breaths, dramatic beats, gaps between sentences — is left exactly as it was. It uses ffmpeg's silenceremove filter applied to each edge (silenceremove … areverse … silenceremove … areverse), so no stop_periods ever run and internal quiet passages are never cut.

Worked example

A phone recording starts with 1.2 seconds of room tone before you begin talking and trails off into silence at the end. Upload memo.mp3, leave Silence threshold at -50, keep Pad kept at each edge at 0.1, and choose mp3. The exported memo-trimmed.mp3 drops the leading and trailing dead air but keeps a tenth of a second of silence on each side so the cut never sounds abrupt — a ~3.6s clip comes back around 1.4s with the spoken part intact.

When to adjust the threshold and pad

Use a more negative threshold such as -55 if the room is quiet and even faint tone should count as silence. Use a less negative threshold such as -40 if there is background hiss and the edges are not being detected. Set Pad to 0 for a hard cut right up to the first and last sound, or raise it to 0.25 to leave more breathing room.

Limits and edge cases

• Input files up to 10 MiB; any audio format ffmpeg can decode should work.
• Threshold must be 0 dB or below (silence is measured below full scale); pad must be 0 or greater.
• Only the leading and trailing silence is trimmed. To collapse long gaps inside the recording, use audio-silence-remove; to shorten (not remove) long internal pauses, use audio-pause-shortener.
• Output is re-encoded to mp3 (192 kbps), wav, ogg, flac, or m4a. Embedded album art is dropped.

FAQ