Audio Cutter

Drop an audio file. Drag the markers. Export the slice as a clean WAV — all in your browser.

🎵 Drop audio here or click MP3 / WAV / OGG / M4A / FLAC / Opus

What is this audio cutter?

This free audio cutter decodes any MP3, WAV, OGG or M4A file in your browser with the Web Audio API, draws a real waveform, lets you drag start and end markers to pick a slice, optionally apply fade-in and fade-out, then export the result as a lossless 16-bit WAV — no upload, no signup.

How do I cut an MP3 online without uploading?

Drop the file into the waveform editor; the browser decodes it locally. Drag the blue start and end handles or type exact seconds, optionally set fade-in and fade-out, then press Export WAV to download the trimmed slice.

Key features

Real waveform editor
Canvas-rendered min/max peaks per pixel — the same way Audition and Audacity visualise audio — so you can see exactly where to cut.
Draggable trim markers
Drag the start and end handles, or fine-tune by typing seconds, with the playhead jumping to the slice when you press Play.
Fade in and fade out
Apply linear fade envelopes on either edge — softens ringtones, podcast inserts and intro stings.
Lossless WAV output
Output is 16-bit PCM WAV at the source sample rate, so quality is preserved through the cut.

How to use it

Drop an MP3, WAV, OGG, M4A, FLAC or Opus file into the upload area. The waveform appears with two draggable markers. Move them or type exact seconds in the right panel; set fade-in or fade-out if needed; press Play to preview the slice; then click Export WAV to download the trimmed audio.

Frequently asked questions

Which audio formats can I cut?

Any format the browser can decode — MP3, WAV, OGG Vorbis, M4A/AAC, FLAC and Opus are all handled by the Web Audio API. Output is always a clean WAV.

Is my audio uploaded anywhere?

No. The file is decoded into a local AudioBuffer with the browser's Web Audio API, trimmed in memory and exported as a Blob via JavaScript. Nothing ever leaves your machine.

Can I add fade in or fade out?

Yes. Set the fade-in and fade-out durations in seconds; the exported WAV applies a linear ramp on those edges.

Built by the Toolbox team on top of the W3C Web Audio API and the canonical RIFF/WAVE PCM container — the same primitives professional editors use under the hood. No server transcoding, no plugin runtime, just the browser.