Free MP3 Cutter & Ringtone Maker
Trim songs to the perfect 30-second ringtone, podcast intro or notification sound. Upload audio, set start and end times, preview, and export as MP3 (via in-browser LAME encoder) or lossless WAV. The entire pipeline — decode, slice, encode — runs locally in the Web Audio API.
🔒 100% Private — runs in your browser, nothing is uploadedHow to Use This MP3 Cutter & Ringtone Maker (Step-by-Step)
- Choose an audio file — MP3, WAV, M4A or OGG — anything your browser can decode.
- Set start and end — Type seconds like 12.5 to 42.0.
- Preview & cut — Listen, then download MP3 or WAV.
Web Audio + LAME in One Tab — Under the Hood
decodeAudioData turns any compressed file into raw PCM samples. The cutter slices the Float32 buffer between your timestamps, then either writes a WAV container (trivial) or pipes samples through LAME — a pure-JavaScript MP3 encoder — to produce a real MP3. No server ever sees your audio.
Frequently Asked Questions
Is the quality preserved?
MP3 re-encodes at 192kbps by default; WAV is lossless from the decoded source.
Does it upload my song?
No — decoding and encoding happen entirely in your browser.
Why is my M4A not loading?
Some browsers cannot decode AAC; convert to MP3/WAV first.