trim MP3 online
The MP3 format uses psychoacoustic compression (ISO/IEC 11172-3) to reduce size by removing audio information the human auditory system perceives with less sensitivity. When you trim an MP3, the precise way to do it without artifacts is to decode the entire file to raw PCM before selecting the segment, which is exactly what the tool does, exporting the result as WAV to preserve maximum quality.
Ideal for use as a ringtone or preview clip.
Visualize the start of the waveform to identify where the sound begins.
Remove mode exports the complement of the selection, whatever is outside it.
The Audio Trimmer accepts MP3, WAV, OGG/Vorbis, FLAC, AAC, M4A, and WebM. The exact support depends on the codec implemented by the browser, but the most common formats work in all modern browsers.
The trimming process decodes the MP3 to lossless PCM and operates directly on the samples. Exporting as WAV preserves that maximum quality. Re-encoding to MP3 would introduce a new generation of lossy compression. Convert to MP3 afterward if needed.
20 milliseconds, whether you keep, remove, or split. It is short enough not to limit genuinely fine cuts, but it stops an imprecise click from producing an empty segment or a split just a few milliseconds from the start or end of the file.
It should not: each edge is snapped to the nearest zero crossing within a 5 ms window and receives an 8 ms fade ramp, so even a cut landing in the middle of a sustained note comes out without the characteristic click of an amplitude discontinuity.
Your file is processed locally in the browser. No data is sent to any server.