Audio Trimmer
Cut a clip out of any audio file the browser can decode — MP3, WAV, M4A, OGG, FLAC — set fade-in and fade-out, preview it, and export a clean WAV. The file is decoded and rendered entirely in your browser; nothing is uploaded.
Trimming without a studio
Most audio cuts are logistics, not artistry: the first eight seconds of a voice note, a ringtone out of a song you own, the useful minute of an hour-long recording. The waveform shows where the sound actually is — silence is flat, speech is spiky — so the markers land by eye, and the preview button plays exactly what will be exported, fades included.
Everything happens on the decoded samples in memory. The browser decodes the file with the same code it uses for a media player, the selection is copied out, the fade envelope is applied sample by sample, and the WAV writer puts a 44-byte header in front. No server, no queue, no upload bar — the export is ready the moment you click it.
Frequently asked questions
Why does the export come out as WAV?
Because WAV is the one format a browser can write perfectly with no encoder: uncompressed 16-bit PCM at the file's own sample rate, playable everywhere and clean enough to feed into any converter afterwards. Re-encoding to MP3 in the page would cost quality and a megabyte of codec for nothing.
Is the audio quality touched?
The samples between your two markers are copied bit-for-bit from the decoded audio, at the original sample rate and channel count. Only the fades change any values — and only inside the fade windows you chose.
What do the fades actually do?
A linear volume ramp: from silence up to full over the fade-in, and back down over the fade-out. Half a second is enough to remove the click a hard cut leaves; two to four seconds sounds like a deliberate ending. If the two fades are longer than the clip, they scale down to meet in the middle.
How large a file can it handle?
The limit is memory: decoded audio is about 10 MB per stereo minute at 44.1 kHz. An hour-long recording works on a desktop; on a phone, keep it to a few minutes. Decoding a compressed file also takes a moment — the length shows up as soon as it is done.
Related tools
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- Image Resizer & CompressorResize images to exact pixels or a percentage and compress them, with a live before-and-after size comparison.
- Video TrimmerCut a piece out of an MP4 without re-encoding it — the clip keeps the original quality and is ready in about a second. Nothing is uploaded.