Audio Trimmer
Shorten any audio file without changing its format. Keep a selected section, or let the trimmer remove the silence before the first sound and after the last one, which is ideal for voice recordings, samples and podcasts.
- Files stay on your device
- No sign-up
- Free to use
Keep this part
Trim
Raise the level if background hiss is not detected as silence; lower it if quiet speech is being cut.
Output
Processing happens on your device; your audio is not uploaded.
How to use Audio Trimmer
- Drop an audio file onto the upload area.
- Choose Keep the selected part and mark it on the timeline, or Remove silence at both ends.
- For silence removal, adjust the level below which audio counts as silence.
- Choose the output format, select Trim audio and download the result.
Audio Trimmer features
Any common format
WAV, M4A, AAC, FLAC, OGG, Opus and MP3, as well as the audio track of videos.
Keeps the format
By default the result uses the same format as the original.
Automatic silence trimming
Detects and removes quiet sections at the beginning and the end in one step.
Adjustable threshold
Tune what counts as silence for noisy or very quiet recordings.
Format conversion
Optionally save the trimmed audio as MP3, M4A, WAV, FLAC or OGG.
Private
Audio is processed in your browser.
When to use Audio Trimmer
- Removing the pause before speaking in a voice memo or dictation.
- Cleaning up the start and end of podcast and interview recordings.
- Trimming instrument samples so they start exactly on the note.
- Cutting a section from a WAV or FLAC file without converting it to MP3.
- Preparing audio clips for apps, games and presentations.
Audio Trimmer FAQ
How is this different from the MP3 Cutter?
The MP3 Cutter is optimised for MP3, including lossless cuts. The Audio Trimmer handles all common formats, keeps the original format, and can remove silence automatically.
How does silence removal work?
The trimmer looks for audio quieter than the chosen level at the start, removes it, then does the same from the end. Silence in the middle of the recording is left untouched.
What level should I use for silence?
−45 dB suits most recordings. If a hum or hiss means nothing is removed, raise the level to around −35 dB. If soft speech is cut off, lower it towards −55 dB.
Will WAV and FLAC stay lossless?
Yes. Trimming a WAV or FLAC and saving in the same format keeps the audio lossless.
Can I trim the audio of a video?
Yes. Drop a video file and the trimmed audio track is saved as an audio file in the format you choose.
Trimming audio cleanly
Most recordings start with a moment of silence while the recorder is set up and end with silence before it is stopped. Removing these gaps makes recordings feel tighter and saves listeners time. Doing it by hand for many files is tedious, so automatic silence detection is a useful shortcut.
Silence detection measures the level of the audio in decibels relative to full scale, where 0 dB is the loudest possible sound and quiet room noise typically sits between −60 and −40 dB. Anything below the threshold counts as silence. Recordings made in noisy places have a higher noise floor, which is why the threshold is adjustable.
To remove silence from both ends, the trimmer processes the start, reverses the audio to treat the end as a new start, and reverses it back. This keeps every sound between the first and last audible moments, including pauses in the middle.
Lossless formats deserve lossless handling. Trimming WAV or FLAC files and saving in the same format keeps every sample intact, which matters for music production and archiving. Lossy formats such as M4A and OGG are re-encoded at high quality.