Extract a chorus from a song
- Input
- Música 3:45, refrão começa em 1:02 e termina em 1:30
- Expected output
- Arquivo WAV de 28 segundos
Ideal for use as a ringtone or preview clip.
trim MP3 online
Trim MP3 online: cut any segment without installing anything
The MP3 format uses psychoacoustic compression (ISO/IEC 11172-3) to reduce size by removing audio information that the human auditory system perceives with less sensitivity. When you trim an MP3, the most precise way to do so without artifacts is to decode the file to raw PCM, select the desired samples, and re-encode — but since the tool exports to WAV, decoding ensures maximum quality in the selected segment.
Continue in the tool
Open full toolWhy cutting MP3 creates artifacts and how to avoid them
- MP3 is encoded in frames of 1152 samples each (~26 ms at 44.1 kHz). A direct bitstream cut in the middle of a frame can produce a brief audio artifact at the cut point — called a "glitch". The solution is to decode the entire file to PCM before selecting the segment, which is exactly what the Web Audio API does automatically.
- The resulting file is saved as 16-bit PCM WAV, not as MP3. This preserves the maximum quality of the selected segment. If you need a smaller MP3 for distribution, convert the exported WAV using a format converter.
Common use cases for trimming MP3
Remove silence from start of recording
- Input
- Gravação de 5:00 com 20 segundos de silêncio no início
- Expected output
- Arquivo WAV a partir de 0:20
Visualize the start of the waveform to identify where the sound begins.
Full tool FAQ
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.
Frequently asked questions
Why is the exported file WAV instead of MP3?
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.
Does this page replace official or professional review?
No. It helps explain the scenario and use the tool more safely, but real decisions should consider official sources, full context and qualified guidance when needed.