Sample input
Audio: harmless 8 second WAV or MP3 clip. Start: 1.0s. End: 4.0s.
FREE ONLINE TOOL
Audio Cutter
Trim MP3, WAV, OGG, or M4A audio with a waveform, preview the selection, and download a WAV cut from your browser.
Reviewed June 14, 2026
Index eligible
Sample input + expected output included
No signup
Productivity
Audio Cutter Trim MP3, WAV, OGG, or M4A audio with a waveform, preview the selection, and download a WAV cut from your browser.
What this tool does
- visual waveform editor
- millisecond start and end controls
- selection preview before export
- WAV output from the selected range
- browser audio decoding where supported
- no FastTool application upload
- output duration proof
- clear unsupported-format message
REVIEWED OUTPUT EVIDENCE
Sample input, expected output, and safe-use boundary
This page is not a generic directory entry. It gives a concrete control input, an expected result, real browser limitations, and a not-for boundary before the visitor uses a real file.
Expected output
Trimmed WAV should download, play, and contain about 3 seconds of audio from the selected range.
Proof checks
- Waveform, numeric fields, and preview all refer to the same selected range.
- Output duration and WAV format are explicit.
- Browser decode errors are shown clearly for unsupported codecs.
When not to use it
Not for forensic audio, music mastering, copyrighted extraction without rights, or confidential recordings on untrusted devices.
Privacy boundary: Standard processing is designed to happen in your browser tab. The page can still load normal site scripts such as consent, analytics, ads, and third-party libraries where needed, so do not use regulated or confidential media unless your own policy allows it.
COMMON QUESTIONS
Before you process a real file
How do I cut an audio file?
Choose an audio file, drag or type the start and end time, preview the selection, then download the trimmed WAV.
Why is the output WAV?
The browser can reliably write WAV from decoded audio. MP3 output requires a separate encoder and is handled by the MP4 to MP3 tool.
Does it upload my audio?
Standard trimming happens in your browser tab without uploading to a FastTool application server.
Which files work best?
WAV and common MP3 files are most reliable. Very large or unusual codecs may fail to decode in the browser.
Methodology, sources, and limitations
FastTool media tools use standard browser APIs such as File, HTMLMediaElement, Canvas, Web Audio, MediaRecorder, and optional lazy-loaded open-source encoders. The site intentionally surfaces browser limits instead of claiming cloud-editor fidelity.