100% Client-Side Stereo Waveform Cutter & Lossless WAV Ringtone Studio
Whether you are cutting a chorus for a custom smartphone ringtone, extracting background music from an MP4 video, or cleaning up a confidential voice memo, uploading large media files to remote servers is slow and risks exposing private recordings.
- Interactive High-DPI Stereo Waveform: Drag the green and amber handles to set exact start and end points while watching the live Fade-In / Fade-Out envelope curve adjust in real time.
- Direct Video Audio Extraction: Drop in `.mp4` or `.webm` videos alongside `.mp3`, `.wav`, `.m4a`, and `.ogg` audio files.
- Lossless 16-Bit PCM WAV Export: Encodes your trimmed segment with sample-accurate fade ramps and up to 200% volume gain directly in browser memory.
Frequently Asked Questions (FAQ)
Q1 Can I extract and trim background music directly from an MP4 video file?
Yes! Simply select any MP4 or WebM video file using the Open Audio/Video button. Our Web Audio API pipeline automatically demuxes and decodes the stereo audio track into memory so you can trim it and export a lossless 16-bit PCM WAV file without uploading the video.
Q2 Why are Fade-In and Fade-Out envelopes essential for ringtones and podcast clips?
Cutting an audio track mid-beat creates an abrupt amplitude jump that sounds like a harsh click or pop. Applying a 1.0–1.5 second Fade-In and Fade-Out envelope smoothly ramps the volume up and down for studio-grade transitions.
Q3 Are my private voice recordings or unreleased song demos uploaded to a server?
Never. All audio decoding, stereo waveform rendering, gain boosting, and 16-bit RIFF WAVE binary encoding happen 100% locally inside your browser.