❓ Frequently Asked Questions – MP3 Cutter
Is this MP3 cutter safe? Is my audio uploaded anywhere?
Your audio file is never uploaded to any server. This tool uses the Web Audio API built into modern browsers to decode and process audio entirely on your device. The output is also generated locally. No audio data ever leaves your device, making it completely safe for private recordings and personal files.
How do I set precise cut times?
You can set precise cut times in three ways: (1) Drag the green start handle and orange end handle on the waveform visualization. (2) Type the exact time in the Start Time and End Time input fields using the format mm:ss.s or just seconds. (3) Play the audio, pause at the exact moment you want, and click the "Set ◀" or "Set ▶" button to set that position as the start or end of the cut.
What does the Fade In and Fade Out effect do?
Fade In gradually increases the audio volume from silence at the beginning of the cut. Fade Out gradually decreases the volume to silence at the end. Both effects use a smooth logarithmic curve for a natural-sounding transition. You can set fade durations from 0 to 5 seconds. Fades are especially useful for creating ringtones, podcast clips and music excerpts that don't abruptly start or stop.
What audio formats are supported?
This tool supports MP3, WAV, OGG, AAC, M4A, and FLAC as input formats. The output can be MP3, WAV or OGG. The input format support depends on what your browser's Web Audio API can decode — most modern browsers (Chrome, Firefox, Safari, Edge) support all listed formats. The WAV output is always lossless PCM regardless of the input format.
What does "Normalize audio volume" mean?
Normalization finds the peak volume in your audio and adjusts the overall volume so the loudest point reaches a target level (typically -1 dBFS). This is useful when your original audio is too quiet or has inconsistent levels. For a ringtone or shared clip, normalization ensures it plays at a consistent volume level.