Top 8 Free Online Guitar Tuners in 2021

Are there any guitar players out there? We’re about to present the best free online guitar tuners! Yes, you got it right! We’re talking about guitar tuning apps that allow you to tune your instrument simply using your computer or mobile device. 

If you don’t play any instruments, you probably won’t be able to understand the hassle of bringing a small tool with you at all times, simply for tuning a guitar, bass, ukulele, violin,…. Finally, it’s time to stop! The following paragraphs will show you a new universe. A universe where you won’t carry a guitar tuner around anymore! Enjoy and… you’re welcome!

How does an Online Guitar Tuner work?

Online guitar tuners are very simple. In the next few paragraphs we’ll review a few of them for you. But first, let’s try to understand how they work. In case you are still learning how to play the guitar, this is definitely part of the things you have to learn.

When it comes to guitar tuning online, there are a few basic rules to follow. If you want to use an online guitar tuner properly, you have to make sure to be in a quiet place, or ask the people around you to take a break while you prepare your instrument. Shouldn’t be an issue, at the end of the day you’re getting ready to entertain them!

In most cases these tuners allow you to tune your instrument by ear or to use the microphone of your phone as a tune detector. 

Let’s assume you will go for the second option and you’ll use the microphone of your smartphone, which is the most convenient way. Once you’re sure that the microphone of your phone is not going to detect other sounds but the one of your guitar, it’s time to start. String by string, tune your guitar following the indications on screen. It might take a while, but then… you’re good to go!

Free Online Guitar Tuners

When it comes to tuning a guitar properly, there are many options available. However, you always want to improve your equipment, and guitar tuning apps can be a great solution! Let’s go through some of the main online guitar tuners that we can find online. They all are free, with some expansions to purchase if you’re interested. It’s good to compare some of these apps and websites to pick the one that offers all the features that better suits our needs. Every time we look for good guitar tuning online opportunities, we must consider all the options available.

Fender Free Online Guitar Tuner

Fender, the great guitar brand, offers a free online guitar tuner on their website. It’s a manual tuner that doesn’t use the microphone. 

acoustic guitar tuner

You can pick between different types of instruments: acoustic guitar, electric guitar, bass and ukulele. You then get to select the tuning you want for your guitar, which could be half step down, Drop D, open C…. At this point you can hit the “virtual” strings and hear the sound that you’re supposed to mirror on your real instrument. There are a couple of videos at the bottom of the page that explain how to tune a guitar and reveal some precious tips. That might not be needed, but they could be a really interesting feature for beginners.

Fender Tune™ App

online tuner microphone

On Fender’s website, they also invite guitar players that are looking for an online tuner to download their Fender Tune™ App. It’s a very well developed guitar tuning app. Free, simple, with limited functions, but tidy and easy to use. Specifically, they offer a guitar tuner connected to the microphone of your phone. This is a great feature because the sound of your guitar gets detected by the app and on the screen of your phone. A signal will appear, telling you if the string is too flat or too sharp. The app, like the website, also offers the opportunity to decide what instrument to tune, between acoustic guitar, electric guitar, bass and ukulele and to pick the desired type of tuning. Just like the website, the app also offers a manual tuning service that you can use to hear the sound of the note that you should then refer to when tuning your guitar. The app also contains a “Tune Plus” section. Here it’s possible to purchase some new interesting features for the app separately. At the moment we’re reviewing this app, you can get the Tune Plus section for free, simply signing up. Careful: it’s a Limited Time Offer and we don’t know when it will expire. However, the Tune Plus expansion of the guitar tuning app gives you access to a Pro Tuner, which is an advanced version of the tuner you were able to use for free, over 5000 chord diagrams, over 2000 scale patterns, metronomes and drum pads. This expansion of the app is very nice and useful, and if you get to use it for free, that’s even better. However, if you were only looking for an online guitar tuner, just stick to the standard app and you will get what you were looking for!

Guitar Tuner – Free and Easy

Guitar Tuner – Free and Easy is a simple and powerful guitar tuning app that also contains very interesting features. When you start the app you get to choose if you want to use a free version that contains ads, or you’d like to upgrade to an ads free version. It’s your call, however, the version with ads is pretty nice. In fact, there are not too many ads and they’re never annoying. The main feature of this app is obviously the guitar tuner. The tuner works quite well with the microphone of your phone, but also allows you to tune your guitar by ear. You can also decide to tune your guitar using some other alternate guitar tunings such as Drop D or Open G. Another great feature of the app is the chords section. If you’re looking for a specific chord, the app will show you how to play it. You can literally find any chords you could possibly think of. Last but not least, the app also offers a metronome function. The metronome is customisable and you can pick the unit of time you need when practicing.

Guitar Tuner – Free and Easy is a very good guitar tuning app, offering a lot of extra features that makes it a very interesting all in one bundle.


online acoustic guitar tuner microphone

Famous guitar tuning app. Very well known by guitar players. GuitarTuna offers many more features for free than those found on the Fender’s app. In fact, on GuitarTuna we find a nice metronome and a Chord Library, dedicated to simple chords. For free. The tuner works very well and is very sensitive and precise. As for the Fender’s app, we can pick between different tuning styles and instruments. GuitarTuna also offers games for beginners. The amount of features of the app is so big that you might lose your primary focus, which is tuning the guitar! But this is a sweet bad aspect of it! GuitarTuna is a very nice and simple app, maybe a bit too stuffed for mid-high level guitar players, but certainly interesting and useful for beginners. Overall, it’s tidy and simple to use. Might be worth it to give it a go!

Guitar and Violin Tuner

guitar tuner

Guitar and Violin Tuner is a pure tuner. This app is very precise and allows you to tune different instruments, such as guitar, bass, viola, banjo, violin, ukulele and cello. A big amount of tuning styles is also available. With this app you’ll also be able to tune your instrument manually. Guitar and Violin Tuner is the perfect app for tuning. Straight to the point without being overstuffed with features and functionalities.

Tuner – gStrings Free

free guitar tuner

Same old story. The app, only available for Android devices, offers the usual main features, nothing more. Tuner – gStrings Free is a nice guitar tuning app with a good interface and graphics. Some ads make it a little bit cheesy, but we can deal with them. You can tune your instrument manually or use the microphone of your phone. Overall a good tuner for guitar. is a tuner that you can use to tune your instrument, whether you’re playing an acoustic guitar, an electric guitar, a bass guitar or a ukulele. The greatest aspect of is that you don’t need to download and install any apps. You simply need to click on the link and open their website. When it comes to tuning your instrument, allows you to tune by ear, or using the microphone of your computer. However, this second option is only available on Safari, Firefox and Chrome Desktop (make sure to allow the website to use your microphone).

Using this tuner is very simple. You only need to hit the string you’re about to tune while the “Detect String” mode is set to on. will guide you to obtain a very accurate sound of the string. is a great and simple tool that will be of great help when practicing at home. Give it a try and make sure to bookmark the page!

Free Universal Tuner

universal tuner

Free Universal Tuner is a really good guitar tuner that uses the microphone of your phone. The app works very well and is simple and to the point. Universal Tuner also offers a big amount of tuning options, transposition and frequency. Like for all the other tuners, the manual mode is also available. Overall, it seems to be a good product, and in fact it is. But… the interface. On a functional level, this app is really good but unfortunately, it just doesn’t look good at all.

It’s all white, with some yellow buttons. Not the greatest appeal in the world, I know. Let me just highlight once again. Do not be superficial and test Free Universal Tuner before judging it. It might not look great, but definitely works quite well.

The Verdict

Tuning a guitar is the very first thing you learn when you join a music school and you start playing this instrument. Tuning a guitar is that action that puts every guitar player at the same level. Whether you are a beginner or a professional, you must tune your guitar if you want to play right. Doesn’t matter if you use a standard tuning mode or you tune your guitar with an alternate tuning, you always want to make sure that your guitar is ready to be played.

The tuners presented above are all very useful and well developed. In terms of precision, they all do a good job.

We’ve just seen how useful guitar tuning online is. In fact, tuning a guitar simply using  the microphone of your phone, is a great solution for playing guitar on the beach or at the park with friends. All without the need of carrying around annoying pieces of equipment that could break or get lost. Tuning a guitar using online tuners works perfectly and as we’ve already seen above, there are many options no matter your skills level and needs on the guitar.

The guitar tuning apps presented above also offer different other services, such as games, chords and scale library and so on. It’s just a matter of finding the one that best satisfies your needs.

Whether you play for fun or you do it professionally, if you liked this article it means that you probably are a musician. You might also be interested in spreading your music around. For that reason, you’d probably find our article about Best Spotify promotion service in 2020 very interesting. 

Good luck for your future in music!Looking for some guitar accessories? Take a look at our review of the best Guitar accessories !