Trim Audio Online — Free Audio Cutter
Upload any audio file, set start and end times, and download the trimmed clip.
How It Works
- 1Upload your file by dragging it into the drop zone or clicking to browse.
- 2Adjust the quality slider to balance file size and visual fidelity (optional).
- 3Click Download to save your converted file.
About Audio Trimmer
Need to cut a section from an audio file? Upload your MP3, WAV, OGG, M4A, or FLAC file, set the start and end times, and download the trimmed clip as MP3 or WAV. The tool decodes your audio using the Web Audio API, slices the AudioBuffer to the specified time range, and re-encodes it. Everything runs in your browser — no files are uploaded to any server. Perfect for creating ringtones, sound effects, or extracting a specific part of a recording.
Frequently Asked Questions
What audio formats are supported?
You can trim MP3, WAV, OGG, M4A, FLAC, and AAC files — any format your browser can decode. The trimmed output is available as either MP3 or WAV.
Is my file uploaded to a server?
No. Transmute processes everything locally in your browser using JavaScript and the Canvas API. Your files never leave your device — there is no server, no upload, no cloud processing.
Can I preview before trimming?
Yes. After uploading your file, you can play the audio and adjust start/end times. The playback lets you verify your selection before exporting.
Is there a maximum file duration?
There is no hard limit, but very long files (over 30 minutes) may take longer to process since all decoding happens in your browser.
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