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Audio tools

Audio Trimmer

Cut silence from the start and end automatically, or set the part to keep yourself.

Runs locally in your browser

Drop your audio here

Or choose a file from your device.

MP3, WAV, M4A, FLAC, OGG, AIFF, WMA & moreYour audio stays on this device · Up to 128 MB per file
1Choose your audio

Drag and drop from your device.

2Trim the silent ends

One click, then adjust the handles if you want.

3Save your audio

Listen to the result and download.

Supported formats & useful details

Open MP3, WAV, M4A, AAC, FLAC, OGG, OPUS, AIFF, WMA, AMR, AC3 and other audio formats supported by the included FFmpeg decoder. You can also extract audio from video files. Support depends on the codec inside the file; damaged or protected files may not open.

Export MP3, WAV, M4A, FLAC, OGG, or M4R ringtones. The converter downloads on first use. Files stay on your device. Refreshing this page clears the current session.

Use arrow keys on the selection handles for precise adjustments. Shift + arrow moves by one second. Press Escape to stop playback.

Complete tool guide

Audio Trimmer guide

Trim the silence off the start and end of a recording. Select Trim silence and the tool finds the first and last sound in the file, keeps a little padding around them, and moves the selection there. You can then adjust the handles by hand, add fades, and save MP3, WAV, M4A, FLAC, or OGG. Everything happens in this browser tab.

Your input is processed in the current browser tab and is not sent to the application server.

Why use this tool?

  • Remove dead air at both ends in one click instead of hunting for the exact moment.
  • Choose how quiet counts as silence, from faint room tone to a strict threshold.
  • Check and adjust the detected start and end on the waveform before saving.
  • Add a short fade so the trimmed recording does not begin or end with a click.

Common use cases

  • Cleaning the pause before you started speaking out of a voice memo or dictation.
  • Removing the gap at the end of a recording where you walked back to stop it.
  • Tidying takes from a phone or handheld recorder before sending them on.
  • Trimming the silent lead-in of a track ripped from vinyl or tape.
  • Preparing clips of a consistent length for a podcast, course, or voice-over.

How to use it

  1. 1

    Choose or drag in one audio or video file.

  2. 2

    Pick a silence threshold if the default is not right, then select Trim silence.

  3. 3

    Check the detected start and end on the waveform, and drag the handles if you want to keep or remove more.

  4. 4

    Add fades if you need them, choose an output format, and select Trim audio.

Controls and results explained

Trim silence

Scans the file for the first and last sample louder than the threshold, then sets the selection to that range plus 0.05 seconds of padding at each end. It reports how much was removed from each end.

Silence threshold

Anything quieter than this level counts as silence. −50 dBFS suits most speech recordings. Use −60 dBFS to keep faint breaths and room tone, or −30 dBFS when the background is noisy and you want a tighter trim.

Manual handles and time fields

The detected range is a starting point, not a lock. Drag the handles, use the arrow keys, or type exact start and end times to adjust it before saving.

Fades and output format

Fade in and fade out ramp the volume at the edges of the selection. MP3 and M4A are encoded at 192 kbps, OGG uses Vorbis quality 5, FLAC is lossless, and WAV is uncompressed 16-bit PCM.

Worked examples

Trim dead air from a voice memo

Start with: memo.wav, 1:12.00 long, with speech from 3.50 to 70.00 seconds

  1. Open memo.wav and keep the default −50 dBFS threshold.
  2. Select Trim silence and read how much was removed.
  3. Choose MP3 and select Trim audio.
Removed 0:03.45 from the start and 0:01.95 from the end.
memo-trimmed.mp3 · 1:06.60

The selection keeps 0.05 seconds of padding around the speech: 3.50 − 0.05 = 3.45 to 70.00 + 0.05 = 70.05, which is 66.60 seconds.

Cut the silent tail off a music recording

Start with: recording.m4a, 5:00.00 long, with music from 0.80 to 252.30 seconds

  1. Open recording.m4a and select Trim silence.
  2. Drag the end handle slightly if the last note is cut short.
  3. Set a 1-second fade out, choose WAV, and select Trim audio.
Removed 0:00.75 from the start and 0:47.65 from the end.
recording-trimmed.wav · 4:11.60

Nearly 48 seconds of silence after the music is dropped, leaving 251.60 seconds. The fade out is applied inside the selection.

How silence is detected

Detection compares each sample’s amplitude against the threshold across every channel. It does not analyze speech or music, so a constant hum or hiss above the threshold counts as sound and nothing will be trimmed.

Only the ends are trimmed

Pauses in the middle are left alone, because they usually carry the rhythm of speech. To remove a silent stretch from the middle, split the file around it and merge the parts you keep.

Length limits

Files can be up to 128 MB, and decoded audio is limited to 256 MB of memory and 30 minutes: roughly 11–12 minutes of stereo audio or 23–25 minutes of mono.

Practical tips for better results

  • If nothing is trimmed, the background is louder than the threshold: try −40 or −30 dBFS.
  • If the first word is clipped, use a quieter threshold such as −60 dBFS.
  • Check the level of the recording in the Audio Inspector when the result looks wrong; a very quiet take needs a quieter threshold.
  • Add a 0.1-second fade in and fade out so trimmed edges never click.
  • Save as WAV or FLAC if the trimmed file will be edited again.

Frequently asked questions

How do I remove silence from the beginning and end of an audio file?

Open the file, select Trim silence, and the selection moves to the first and last sound. Check it on the waveform, then select Trim audio and download the result.

Can I choose a section manually instead of trimming silence?

Yes. Drag the start and end handles or enter exact times to keep a chorus, interview answer, or any other section. Preview it, add fades if needed, and select Trim audio.

Can it remove silence in the middle of a recording?

No. Only the ends are trimmed. For gaps in the middle, use Split audio around the silence and then Merge audio to join the parts you keep.

Why was nothing trimmed from my file?

The quiet parts are still louder than the threshold, which is common with background noise or hiss. Choose a stricter threshold such as −40 or −30 dBFS and try again.

Is the audio uploaded to a server?

No. Detection, trimming, and encoding all run in this browser tab, and the original file on your device is never changed.

What to check before using the result

  • Only silence at the start and end is removed; pauses in the middle are kept.
  • Detection compares raw amplitude, so constant background noise above the threshold prevents trimming.
  • Decoded audio is limited to 256 MB of memory and 30 minutes.

Keep working

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