How to Use It
Trimming an audio file with ZeroCutLab's Audio Cutter is as simple as it gets: drag your MP3, WAV, OGG or AAC file into the area above, or click "Choose File" to pick one from your device. As soon as the file loads, a waveform visualization is generated automatically and the file is ready to edit.
Drag the green and red handles on the waveform to select the range you want to trim, or type values directly (in seconds) into the "Start" and "End" fields for millisecond-precise results. Use "Play Selection" to preview just the chosen part before committing, then pick WAV, MP3, OGG, AAC or FLAC and click "Download" to save the result straight to your computer.
All of this — waveform analysis, playback, trimming and file conversion — happens on your device using your browser's built-in Web Audio API. That means fast results even with large files, and you can keep editing even if your internet connection drops (once the file has loaded).
Your Privacy Matters
Your files are never uploaded to our servers; all audio processing, waveform generation and trimming happen entirely in your device's memory, inside your browser. Since no data is ever transmitted to a server, your private, personal or copyrighted content stays safe. Once you close the page, the processed file is automatically cleared from your device.
Frequently Asked Questions
Is this tool really free?
Yes, ZeroCutLab's Audio Cutter is completely free and requires no sign-up or membership. Because processing happens in your browser, there's no server cost — which lets us offer the tool for free without limits.
Are my files uploaded to a server?
No. As soon as you select a file, everything happens entirely inside your browser using the Web Audio API. Your audio file never leaves your device and is never sent over the internet.
Which audio formats do you support?
You can upload MP3, WAV, OGG and AAC/M4A files. You can also download the trimmed result in whichever format you prefer: lossless WAV or FLAC, or MP3, OGG (Vorbis) or AAC (M4A) for a smaller file size — you choose the bitrate (128/192/320 kbps).
Does trimming reduce audio quality?
Your selection is processed while preserving the original sample rate and channel count. Choosing WAV or FLAC results in zero quality loss; choosing MP3, OGG or AAC applies a small quality/size trade-off based on compression, and you control the bitrate (kbps).
Can I use this on mobile?
Yes, the interface is fully responsive. You can drag the waveform handles with touch and use every control comfortably from your phone or tablet.