Voice memos, interviews and calls are exactly the files you would rather not hand to a stranger’s server. These tools do the work inside your own browser instead.
Convert audio to MP3 or WAV, cut a clip out of a longer file, join several clips into one, or take the sound out of a video. You can also record your voice and save it as an MP3 straight away.
Files are decoded in memory, so very long recordings need free memory on your device. For speech, 128 kbps MP3 sounds clean at a small size. For music, 192 kbps or higher is worth it. MP3 encoding uses lamejs, a free JavaScript port of the LAME encoder, released under the LGPL-3.0 licence.