Audio Cutter
Sample-accurate audio cutter & trimmer — live waveform preview, AI silence detection, smart trim, fade in/out & batch export
What is Audio Cutter?
Audio Cutter is a free online audio tool from Farvixo that lets you sample-accurate audio cutter & trimmer — live waveform preview, AI silence detection, smart trim, fade in/out & batch export. Decoding and encoding both happen in your browser through WebAssembly, so recordings, interviews and voice notes never reach a server. Free and unlimited, with no watermark or audible tag added to the output.
How to use Audio Cutter
Add an audio file to Audio Cutter. Processing runs locally in your browser, so your recordings are never uploaded.
Pick the format, bitrate and sample rate you need, or use a preset tuned for music, podcasts or voice notes.
Convert and download the finished file. Quality is yours to control and nothing is added to the output.
Frequently Asked Questions
What audio formats are supported for cutting?
Farvixo Audio Cutter supports MP3, WAV, AAC, FLAC, OGG, M4A, OPUS, AIFF, WMA, and AMR. You can export your trimmed audio as MP3, WAV, AAC, FLAC, or OGG.
How accurate is the audio trimming?
Our waveform editor provides sample-accurate and millisecond-level precision (0.001s). You can zoom up to 20x into the waveform and use frame-by-frame seek buttons.
How does AI Silence Detection work?
AI Silence Detection scans the audio buffer for quiet frames below -40 dB, highlights silent gaps on the waveform, and lets you automatically trim lead-in/lead-out silence or cut out all silences with one click.
Can I add fade-in and fade-out effects?
Yes! You can specify custom fade-in and fade-out durations in seconds (e.g. 0.5s fade-in, 1.0s fade-out) or enable Smart Fade for automatic smooth boundary transitions.
Is my audio file uploaded to a server?
No. All audio cutting, silence analysis, and encoding run 100% locally in your browser using Web Audio API and WASM FFmpeg. Your files never leave your computer.
Can I cut out parts from the middle of an audio file?
Yes! Switch to "Remove Selection" mode to cut out a middle portion and automatically join the remaining start and end pieces seamlessly.
Can I download the cut files as a ZIP or share via QR code?
Yes! You can download the exported file directly, download as a ZIP archive, copy the download link, share via Web Share API, or generate a QR code for instant mobile transfer.
What you can use Audio Cutter for
- Fitting a podcast episode or voice note under a messaging or email size limit
- Converting a recording to the format a player, DAW or upload form requires
- Journalists and researchers handling interview audio that must stay private
- Preparing audio for a video edit at a consistent bitrate and sample rate
Audio Cutter at a glance
- Tool
- Audio Cutter — Audio Tools
- Purpose
- Sample-accurate audio cutter & trimmer — live waveform preview, AI silence detection, smart trim, fade in/out & batch export
- Input
- One or more files (MP3, WAV, M4A, AAC, FLAC, OGG, Opus, MP3, WAV, AAC, FLAC, OGG, M4A, OPUS, AIFF, WMA, AMR)
- Output
- Audio file in the selected format and bitrate
- Processing
- In your browser — files are never uploaded to a server
- Price
- Free, unlimited, no account required
- Limitations
- Bounded by your device's memory and CPU rather than a server quota; very large files may be slow on older hardware
Tips for better results
- Speech is fine in mono — downmixing halves the file size with no perceptible loss on voice content.
- For spoken word, 64–96 kbps is transparent; music generally needs 128 kbps or more.
- Every lossy re-encode loses information. Always start from the highest-quality original you have, not from a file you already compressed.
Common problems and how to fix them
The file will not load
The container is fine but the codec is unusual, or the file is partially downloaded. Re-download the original and try again.
The output sounds thin or watery
The bitrate is too low for the material. Raise it a step, and keep stereo if the source is music rather than speech.
Volume is inconsistent across the file
Enable loudness normalisation, which levels the track to a single EBU R128 target instead of leaving the peaks and quiet passages as they were.
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