Guitar tuner online: Tune up your guitar

Tune up your guitar, bass, ukulele, or any string instrument with our free microphone-based online tuner. Just open the web page, grant access to the microphone, and follow the instructions on the screen. Tune your guitar instantly with the free Online guitar tuner by GuitarTuna. No sign-up required — fast, accurate, and easy tuning for all skill levels! Guitar-Tuner.org offers a free online tuner for acoustic, electric, bass guitar or ukulele. You can tune your instrument automatically with a microphone or by ear with a simple click. Online Guitar Tuner is a free web based guitar tuner by GuitarApp. Tune your guitar using your laptop or phone microphone. Tuner for DADGAD, Drop D, Open D and many other tunings. This is an online tuner for guitar, bass, ukulele, mandolin, banjo, violin and cello.