AudioDing

AudioDing is a suite of free audio tools that run in your browser, with audio processed on your device. Tools include trim, splitter, combine, reverse, a low-pass filter, an MP3 metadata editor, converters, tap tempo, pitch detector, BPM and key finder, guitar, ukulele, violin and bass tuners, noise removal, a metronome, drum machine, soundboard maker and music visualizer.

All tools are free, with no sign-up, subscriptions or installation. It works on desktop and mobile browsers including iPhone and Android, with a 50MB upload limit. The interface is available in 11 languages; speech to text and text to speech are English only.