About the Audio Trimmer
Cut a song down to the chorus, clip a quote from an interview, remove dead air from the start of a recording, or make a sample from a longer track. Set the start and end points, preview exactly the section you're keeping, and export. Because the trimmer copies the audio stream rather than re-encoding it, the result is bit-identical to the original and finishes in seconds. Your file never leaves your device.
Lossless trimming
Most online audio cutters decode your MP3 and re-encode the section you keep, which adds another round of compression loss and takes time. This tool uses stream copy: it seeks to your start point and writes the existing compressed frames straight into a new file. An MP3 stays an MP3 at the same bitrate; a FLAC stays lossless. The trade-off is that cuts land on frame boundaries — about 26 ms for MP3 — which is imperceptible for almost every use. If you need a fade at the cut points, run the result through the Fade In/Out tool.
What people trim
- Ringtones and alarm sounds — 20–30 seconds of a favourite song (see also the Ringtone Maker, which adds fades and iPhone M4R export).
- Podcast clips for social media — pull the best 60 seconds for a teaser.
- Voice memos and lectures — remove the fumbling at the start and the silence at the end.
- Samples and loops — isolate a drum break or a vocal phrase for production.
- Sound effects — cut a single hit out of a longer recording.
- Music for videos — trim a track to the length of a clip before importing it into an editor.
Supported files
Any audio your browser can decode: MP3, WAV, FLAC, AAC/M4A, OGG, OPUS, AIFF and the audio track of many video containers. Output keeps the input format. There is no size limit beyond your device's memory, so hour-long recordings work fine on a desktop.
How to use the Audio Trimmer
- 1Load the audio. Drop the file onto the page. It is decoded locally for playback and the waveform.
- 2Set start and end. Drag the handles or type exact times. Play the selection to check it.
- 3Trim. Click Trim. The section is copied into a new file without re-encoding.
- 4Download. Save the trimmed audio.
Frequently asked questions
- Does trimming reduce audio quality?
- No. The selected audio is copied without re-encoding, so quality is identical to the original.
- Can I cut out the middle and keep both ends?
- Trim the two parts you want as separate files, then join them with the Audio Merger.
- Why does the cut land a fraction of a second off?
- Lossless trimming can only cut at compressed-frame boundaries — roughly 26 ms for MP3 and 21 ms for AAC. For sample-accurate cuts, convert to WAV first with the Audio Converter, trim, and convert back.
- Is my audio uploaded?
- No. Everything runs in your browser via FFmpeg compiled to WebAssembly.