In this guide
Choose the editor for the task: QuickTime can trim a compatible recording, a browser trimmer can prepare a short MP3 or WAV excerpt, and Audacity offers multitrack editing. Preserve the original and listen to the saved export.
To edit audio on a Mac, open a compatible recording in an editor, select the section you want to keep or remove, and save or export a separate copy. For a simple trim, try QuickTime Player or a local browser tool. For multiple cuts, overlapping tracks or effects, use an editor such as Audacity.
Keep the original file, then play the edited copy from beginning to end. Check cut boundaries, timing and the actual output format before sharing.
Choose a method
| Your task | Starting method | What to check |
|---|---|---|
| Trim a compatible recording | QuickTime Player's Edit → Trim controls. | Keep a copy and check the saved format. |
| Keep one short MP3 or WAV excerpt | The browser audio trimmer. | Input, output, duration and codec limits. |
| Make several cuts or mix tracks | Audacity or another multitrack editor. | Track timing, mute/solo states and exported audio. |
Trim an audio recording with QuickTime Player
- Duplicate the original. Make a copy in Finder before editing and give it a distinct name.
- Open a compatible file. Open the copy in QuickTime Player and play a short section. Not every file or codec is supported.
- Choose Edit → Trim. Drag the yellow handles to mark the section to keep. Play around the boundaries where available, then click Trim. Apple's trimming instructions explain the controls; Apple also documents trimming and splitting audio recordings.
- Save and check. Save the edited copy, reopen it and listen to the beginning and ending. Check the resulting file type; trimming does not necessarily produce an MP3.
This method is useful for a continuous excerpt. For several internal cuts, choose a clip workflow or an editor with a timeline and verify whether removing a section closes the gap.
Trim a short MP3 or WAV locally in your browser
- Open the audio trimmer and select a supported mono or stereo MP3 or WAV file.
- Enter the start and end times for the excerpt. The tool keeps one continuous interval; it does not remove a separate sound inside that interval.
- Choose WAV or MP3, prepare the output and listen to the actual preview. Adjust the endpoints if a word, attack or tail is cut off.
- Download the file. The input and output must each fit five minutes and 50 MiB, and browser codec support varies. Keep the original source.
The browser reads and processes the selected audio locally. WAV and MP3 are new exports; MP3 is a lossy encode and can introduce delay or padding. WAV does not restore detail previously lost from an MP3 source.
Make multiple cuts in Audacity
- Open Audacity and import a compatible recording with File → Import → Audio. Some formats may require FFmpeg support; consult Audacity's editing guide for your version.
- Listen and drag over an unwanted passage in the waveform. Zoom in and check the boundaries before deleting it.
- Play across the edit. Deleting a selection can move later audio earlier, so preserve a gap when synchronization with another track or video matters.
- Save an Audacity project if you need to continue editing, then use File → Export Audio to create a separate WAV or MP3. Reopen and listen to the exported file.
For a step-by-step selection and split workflow, see how to cut audio in Audacity. If a new join clicks, the edit-click guide explains how to inspect and adjust it.
Mixing, cleanup and format choices
If you want music beneath narration, use separate tracks in a suitable editor and adjust their levels while listening to the overlap. The mixing guide shows a two-track example. Joining clips end to end is a different task from mixing them together.
A trim removes time, not a particular sound within that time. If speech and music are already mixed, a source-isolation estimate may help, but it can retain bleed or alter wanted audio. Keep the original and compare the result.
For further editing, PCM WAV can be a useful working format when supported. MP3 is a smaller listening format but is lossy. Choose the format requested by the recipient and check the actual export; see MP3 vs. WAV for editing.
Common questions
Can I edit audio on Mac without uploading it?
Yes. QuickTime and Audacity can work with supported local files. The Saturalabs browser trimmer also processes supported files locally.
Can QuickTime export any file as MP3?
Do not assume its audio-only export is MP3. Check the saved format; the Mac video-audio guide explains a separate MP3 conversion workflow.
Why did my cut create a click?
An abrupt waveform change at a boundary can produce a click. Listen closely, adjust the cut or test a suitable fade, and compare the result with the original.