Audio tools

Remove the vocals from a song, split it into parts, change the key or tempo and find the BPM and key. Pull audio out of recordings, change the format, tighten silences and even out the volume. Everything you need for singing and instrument practice and production, and for preparing meeting recordings and podcasts.

Tools

Vocal removerRemove the vocals to get an instrumentalAcapella extractorExtract only the vocals from a songStem splitter (4 stems)Split into vocals, drums, bass and otherDrum removerRemove only the drums from a songBass removerRemove only the bass from a songKaraoke track makerRemove vocals and change key and tempoPitch shifter (change key)Change the key in semitones without changing the tempoBPM and key finderFind the tempo (BPM) and key of a songConvert audio formatConvert between MP3, WAV, M4A, AAC, OGG, OPUS, FLAC and AIFFTrim audioCut out just the part you needRemove silenceDetect and cut the quiet parts of a recordingNormalize volumeMatch loudness across files or lift quiet recordingsChange audio speed0.5× to 3×, keeping the pitch

Popular conversions

MP4 to MP3Extract the audio of a video as MP3WAV to MP3Shrink large WAVs to a tenth of the sizeM4A to MP3Convert iPhone voice memos (M4A) to MP3MP3 to WAVConvert MP3 to uncompressed WAV for editing

About the audio tools

The vocal remover, stem splitter and karaoke tools run HTDemucs, a source separation AI released by Meta, inside your browser. The AI model (about 90 MB) is downloaded on the first run only, and songs are never uploaded. In Chrome or Edge on a computer a 4-minute song takes about 1 minute on the GPU (WebGPU); on iPhone, iPad and Safari it takes about 7 minutes on the CPU.

Format conversion reads and writes audio with the browser's built-in WebCodecs, which also reads the audio track of videos such as MP4 and MOV. For MP3 we bundle LAME as WebAssembly for browsers without a native encoder. Silence removal and normalization read the file twice and never decode the whole recording into memory at once, so recordings of several hours work too.