tooloora

Cut Audio — trim MP3 & WAV to the part you need

Drag the handles in the waveform, listen to the selection, fade the edges and export it — locally in your browser, no upload.

Runs locally — nothing is uploaded

Drop audio files here or click

MP3, WAV, M4A, OGG or FLAC · one file · stays local

Runs locally in your browser – no upload.

Up to 30 minutes per file – longer recordings exceed the browser's memory.

Cut audio — just the part you need

Drop a file, drag the start and end handles in the waveform, listen to the selection, export it. The cut happens entirely in your browser, the recording is never uploaded — which is exactly the point for interviews, voice memos and private recordings. The result is a new file; your original stays untouched.

How precise can an audio cut be?

This tool works on the decoded audio and therefore cuts sample-exactly — at 44.1 kHz that is 1/44,100 of a second. Classic MP3 cutting without decoding cannot do that: an MPEG-1 Layer III frame holds 1152 samples, which at 44.1 kHz is exactly 26.12 milliseconds. Such a cut always lands on a frame boundary.

What does cutting cost in quality?

The selected section is encoded once more. With a lossy source (MP3, M4A, OGG) that means a second compression — usually only audible at low bitrates or after repeated rounds. If you want to be safe, export to WAV (lossless but large) or pick a bitrate at least as high as the source.

How do I remove a piece from the middle?

In two steps: export the part before the unwanted passage, then the part after it, and join both with the merge tool. Keeping these separate is deliberate — you get to hear the actual result after each step.

Why does a cut edge click — and what helps?

Because a hard cut makes the waveform jump from full level to zero within a single sample; that step is a very short, very broadband impulse, and you hear it as a click. The fade option deals with it: 30 milliseconds is plenty for speech, and there is a one-second setting for music. Both ramps are shortened automatically if the selection is shorter than the fade. If you place the cut in a pause anyway, you do not need it at all — which is why it can be switched off.

How do I make an iPhone ringtone?

Use the ringtone preset. It puts the end 40 seconds after your start marker, switches the target format to AAC and downloads the file with the .m4r extension. Both come from Apple: the media library will not accept a ringtone longer than 40 seconds, and .m4r is simply a renamed AAC file in an MP4 container. To transfer it, drag it onto the connected iPhone in Finder or iTunes. If your browser cannot encode AAC, the button stays greyed out — with a reason, instead of an error after the click.

Honest limits

  • Up to 30 minutes per file. For cutting, the recording must sit decoded in memory: roughly 21 MB per stereo minute at 44.1 kHz.
  • One section per run. Each pass produces exactly one file; for several passages, cut them one after another.
  • The fade is linear, not a curve editor. For shaped transitions, an audio editor is the right tool.
  • Formats: anything your browser can decode goes in — MP3, WAV, M4A/AAC, FLAC and, in most browsers, OGG.

Frequently asked questions

Is my file uploaded to cut it?

No. The audio is decoded, cut and re-encoded in your browser. Nothing is transferred, which matters for interviews, voice memos and recordings you would not want on a stranger's server.

How precise is the cut?

Sample-exact, because the tool works on the decoded audio. Cutting an MP3 without decoding it would only be possible in frame steps: an MPEG Layer III frame holds 1152 samples, which is 26.1 milliseconds at 44.1 kHz.

Does cutting reduce the quality?

The selected part is re-encoded once, so a lossy source (MP3, M4A) goes through a second compression. Export to WAV if you want to avoid that, or use a higher bitrate than the source.

Can I remove a part in the middle?

Not in one step — cut the piece before the unwanted part, then the piece after it, and join both with the merge tool.

How do I make an iPhone ringtone?

Use the ringtone preset: it sets the end 40 seconds after your start marker, switches the target to AAC and names the download .m4r. Apple limits ringtones to 40 seconds, and .m4r is the extension the media library expects — the content is a normal AAC file in an MP4 container. Transfer it by dragging it onto the connected iPhone in Finder or iTunes. The button stays greyed out if your browser has no AAC encoder.

What does the fade option do?

It puts a short ramp on both edges of the selection — 30 milliseconds by default, one second for music. That removes the click you hear when a cut lands in the middle of a loud sound, because the waveform no longer jumps from full level to silence in a single sample. You can also switch it off entirely.

Which formats can I cut?

Everything your browser can decode: MP3, WAV, M4A/AAC, FLAC and, in most browsers, OGG. Very long recordings should stay under 30 minutes, because the audio is decoded into memory (about 21 MB per stereo minute).