Trim an audio file
Play the audio, drag the handles to pick a start and end, hit trim. Output is MP3 at your chosen bitrate.
Drop your file here
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How it works
Play the audio, drag the handles to pick a start and end, hit trim. Output is MP3 at your chosen bitrate.
Drop any audio the browser can decode (MP3, WAV, M4A, OGG, FLAC). The trimmer shows a waveform-style scrubber: play the file inline, then drag the two handles to set the start and end points. Pick an output bitrate (128, 192, 256, or 320 kbps). The tool re-encodes as MP3 via ffmpeg.wasm, which loads on first use (~25 MB) and caches. The trim is sample-accurate, no keyframe constraints. Useful for cropping podcasts to a quote, cutting a song intro, or grabbing the last minute of a long recording. Output filename has -trimmed.mp3 appended. The original audio isn't modified.
How to use it
- Drop your audio file. MP3, WAV, M4A, OGG, and FLAC are all accepted.
- Find the cut points. Play the file inline and drag the two handles to set start and end, down to a tenth of a second.
- Pick a bitrate. Choose 128 to 320 kbps for the MP3 output.
- Trim and download. The -trimmed.mp3 is encoded locally by ffmpeg.wasm and downloads.
Frequently asked questions
- How do I cut an MP3 to a specific time?
- Drop the file, drag the handles to where you want the cut to start and end, hit Trim. You can also click to play and find the exact spot.
- What's the smallest trim resolution?
- About a tenth of a second. The trimmer reads tenths from the audio element's currentTime.
- Will the trim be exact?
- Yes. The tool uses ffmpeg's -ss / -to seeking after the decode, which is sample-accurate for re-encoded output.
- Is my audio uploaded?
- No. ffmpeg.wasm runs in your browser, the file stays local.