Trim, convert and fix audio in the browser
The Audio Trimmer cuts a section out of any audio file — trim the silence off a voice memo, isolate one part of a song — and downloads the result as WAV. The Audio to WAV Converter takes MP3, OGG, M4A or anything else your browser can play and produces uncompressed WAV, which is what many editors, samplers and transcription workflows expect as input. Neither tool touches a server: your browser decodes the audio locally, so a sensitive recording — an interview, a meeting, a voice note — stays exactly that.
The Audio Volume Booster raises quiet recordings or normalizes them to a target peak, the standard fix for an interview recorded too far from the microphone. The Audio Speed Changer plays material anywhere from 0.25× to 4×, whether you are slowing a guitar riff down to learn it or speeding through a long lecture recording. Both export WAV, so the result is not re-compressed and no further quality is lost on the way out.
Test tones, tempo and recording
Three of the tools are instruments rather than editors. The Tone Generator plays precise sine, square, triangle or sawtooth waves at any frequency — for testing speakers, hunting a room rattle or checking the upper limit of your hearing. The Online Metronome keeps time with tap tempo, adjustable BPM, time signatures and accented beats, and its timing comes from the Web Audio clock rather than a drift-prone JavaScript timer. The Voice Recorder captures audio straight from your microphone and downloads the take; the recording lives in browser memory on your device and is gone when you close the tab.