Trim MP3, WAV, M4A audio files online by timestamp
What is the Audio Trimmer?
The audio trimmer works like this: it trims audio files by time range or fades in/out, exporting in the original or a chosen format. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.
How to use the Audio Trimmer
Select your audio or video file.
Set the conversion options (format, quality, range).
Process - the browser engine handles it locally.
Download the output.
Features
Powered by in-browser FFmpeg (WebAssembly)
Your files never upload anywhere
Progress shown while processing runs
Common mistakes to avoid
Choosing bitrates below the platform minimum
Re-encoding already-compressed files repeatedly
Examples
Input
Result
Remove 12s of intro silence
Track starts clean, rest bit-identical
Best used for
Getting a reliable answer for audio trimmer without installing an app
One-off tasks done in under a minute from any device
Checking results before committing them to something important
Working on a phone where desktop software is unavailable
Privacy
Audio and video processing runs on your device with WebAssembly FFmpeg; your files are never uploaded.
Frequently asked questions
Can it trim multiple segments?
Run it per segment and join the results with the Audio Joiner - the two tools pair for podcast editing.
Can I trim and add fades at the same time?
Yes - set the time range and fade-in/out lengths together; the export applies both, in the original format or one you choose.
What does a fade do to a ringtone or clip?
It ramps volume at the edges so the clip starts and ends smoothly instead of clicking in and out abruptly.