BuzzKit
Audio Trimmer
Set a start time and duration to keep only the section you need. Output is always MP3, so a WAV input becomes lossy.
Trimming is usually fast since only the requested section needs to be re-written.
How the audio trimmer works
This tool tells ffmpeg to seek to your chosen start time and export exactly the duration you specify.
Drop your audio file
Preview it to find the section you want.
Set start & duration
Enter the exact seconds to keep.
Trim & download
Get back just that section as an MP3.
Common jobs for an audio trimmer
An audio trimmer lets you keep only the part of a recording you need: a clip from a longer interview, the best section of a voice memo, or a short sample from a track. Enter the start time and the length you want, and the tool exports exactly that section as an MP3.
Listen to the file first so you know the timestamps you want. To join several trimmed sections afterward, send them through the Audio Merger, and if the clip came out too quiet, raise it with the Volume Booster.
Frequently asked questions
How precise is the cut?
Down to a tenth of a second, based on what you enter.
Can I fade in or out?
Not yet — this tool performs a hard cut only.
What format is the output?
Always MP3, regardless of the source format. Output is MP3, so a WAV input becomes lossy.
Is my audio uploaded anywhere?
No. The trimming runs in your browser tab using ffmpeg compiled to WebAssembly, so your file stays on your device.
Can I keep more than one section?
Not in a single pass, because each run keeps one section. Trim each part separately, then join them with the Audio Merger.