Audio tools
Convert, trim, join and measure audio in the tab
Decoding and encoding both happen through the browser's own media pipeline, so a WAV becomes an MP3 with no round trip to a server and no queue to wait in. Long recordings are read a chunk at a time, which is why an hour of audio does not have to fit in memory all at once.
- Compress audioMake an audio file smaller by re-encoding it, with the quality you choose.
- Trim an audio fileCut a clip out of a recording by choosing where it starts and ends.
- Read audio file informationSee the real codec, bitrate, sample rate, channels and length of any audio file.
- Join audio filesPut several recordings end to end as one file, in the order you set.
- Normalize audio volumeRaise a quiet recording as loud as it will go without clipping, and see by how much.
- Generate an audio waveform imageDraw the waveform of a track as a PNG, in the colour and style you pick.
- Convert WAV to MP3Turn uncompressed WAV recordings into MP3s a tenth of the size.
- Convert MP3 to WAVDecode MP3s to uncompressed WAV for editing software that insists on it.
- Convert M4A to MP3Turn M4A and AAC files from a phone or Apple device into MP3s.
- Convert FLAC to MP3Turn lossless FLAC albums into MP3s that fit on a phone or in a car.
- Convert OGG to MP3Turn OGG and Opus files into MP3s that play everywhere.
- Convert AAC to MP3Turn raw AAC streams into MP3 files that every player will open.
- Convert WAV to FLACHalve the size of a WAV without losing a single sample.
- Convert FLAC to WAVUnpack a lossless FLAC into the WAV that older software insists on.
- Convert stereo to monoFold two channels into one, halving the size of a recording that never needed both.
- Convert mono to stereoGive a single-channel file the two channels some software and hardware require.
- Change audio bitrateRe-encode a file at a higher or lower quality, and see what it costs in size.
- Change audio sample rateResample a file to 44.1 kHz, 48 kHz or lower, for software that wants a specific rate.
Runs in your browser. Nothing is uploaded.