Online bass tuner

Guitar, bass, ukulele & more

4.8

Your all-in-one app for guitar

Download GuitarTuna today to tune, practice, learn, and play songs.

An acoustic guitar head with tuning pegs

Start playing songs you love with easy chords

Explore thousands of songs for guitar with chords and lyrics.

Explore songs

Join millions playing with GuitarTuna

#1 Tuner
in AppStore & Google Play
+
AppStore & Play rating
M
Downloads worldwide
k+
Songs available

How to tune a bass online

Press “Tap to tune” to start the tuner and allow microphone access when asked. Pluck one open string and let it sustain so the tuner can lock onto the pitch. You will see the note name and whether the string is flat or sharp. Turn the tuning key a little, then pluck again to confirm the change. Work through each string until the display settles on the correct note. When you finish, do a quick second pass to confirm everything stayed in tune.

Choose 4-string or 5-string and follow the right notes

Use the string selector to switch between 4-string and 5-string bass setups. The target notes update automatically, so you can tune standard E A D G on a 4-string, or include the low B for a 5-string. If your bass is set up differently, start by matching the closest standard tuning, then adjust each string to your preferred notes. This helps the tuner recognize pitches more reliably, especially in the lower range. Once selected, your choice stays consistent as you continue tuning.

Tips for low notes and stable tuning

Low frequencies can be harder to detect in noisy rooms, so tune in a quiet space and let each note ring longer than you would on a guitar. Pluck near the middle of the string for a clear fundamental and avoid hitting too hard, which can cause extra overtones. If the reading wobbles, try using a lighter touch and plucking again. Bass tuning can drift after long sessions, transport, or temperature changes, so check tuning before practice and before recording. A quick retune after a few songs keeps your intonation tight.

Tune and play all in one app

Download GuitarTuna to get in perfect tune and play songs you love with chords, tabs, and lyrics. Start for free.

Play your favorite songs on guitar

Explore thousands of popular songs by top artists. Choose simplified or original versions and play at your own pace as songs sync with you. Discover something new with songs added daily.

Practice like a pro with everything you need

Play better with the all-in-one app. Access chords, tunings, trainers, metronome, and more. Practice any chord, even without your guitar, with fun and interactive chord games.

GuitarTuna features

Follow clear, guided videos that walk you through songs one chord at a time — simple, visual, and perfect for beginners.

Focus on your sound, not interruptions. Enjoy unlimited, distraction-free practice and playback with GuitarTuna Unlimited.

Access 400,000+ songs to play and practice. From rock classics to indie hits — find, learn and play the music that keeps you inspired.

Keep your hands on the strings while chords move for you. Smart Scroll follows your pace so you can focus on playing guitar.

Tune any instrument with precision. Choose from standard, alternate, or custom tunings — or tune by ear for full control.

Easily tune various instruments using smart presets, including the banjo, ukulele, bass guitar, violin, and mandolin.

Stay perfectly in time with tap-to-set tempo, adjustable speed, and multiple time signatures for every playing style.

Learn faster by playing. Practice chords, transitions, and shapes through fun mini-games that make progress feel effortless.

Trusted by guitar players worldwide

Best Tuning App Ever
MaddProfessor
“I've downloaded many tuning apps before and this one is by far the best. Easy to use, super user-friendly, and they have a bunch of fun different chords and songs to help you learn new music. I highly recommend.”
Well-Designed App
Rose the Black Cat
“I mostly use this for tuning my guitar, which this app makes ridiculously easy. It also has a large selection of songs to play along to and it helps show you which chords to play as well how to make the shapes with your fingers.”
Got me back into playing
Tuliketsune
“I got this app to tune an old guitar, and noticed it has a feature that autoscrolls as I play chords to famous songs. For some reason, this was a lot more motivating for me than any other way of practicing guitar. Now I'm actually practicing and remembering the names of chords 🙂”
Secret weapon
Brad
“Not only is it a tuner (best app tuner I've used personally) but it also has a metronome, games, chords, and a plethora of instruments to choose from and it's SUPER easy to navigate. I love it! Thanks for making an awesome app. From one musician to another, THANKS!!!”
Very reliable tuner
theNewPaul
“This is a great app! Very easy to use and very reliable, if you are just starting out, you can take a big worry off your mind, by getting in tune quickly and easily with this app. Highly recommended!”
This is the best guitar tuner ever.
Caleb Schafli
“It tunes your guitar accurately so you can get the best sound. I like all the other little games as well because they teach you how to play different chords and you can learn to identify the chords by listening to them and it is all offline.”
Great to tune and play
Lynae T
“I love how easy it is to tune and find and play my favorite songs.”