Swiff Audio C20 Guitar Tuner Pedal

Super precise for a small size.

I love how small this tuner is. It is very accurate and has incredible response time. Very easy to use. I would wait till it is on sale to buy it though since it is a bit on the pricier side for its size.

DefcoreDurzReviews

May 14, 2026

Accurate and perfect for cramped or small boards!

The Swiff Audio C20 is one of the best budget tuners I’ve used for multiple reasons. The biggest perk here is the TINY size of the thing, less than half the size of a basic mini-pedal. This helps this unit squeeze onto even the most cramped of boards. The build of the unit is also notably sturdy with an all-metal shell and a quality footswitch and LED screen. Love that the screen itself is the footswitch!

The unit also cuts your signal while tuning, great for not torturing anyone nearby while tuning up! The display is also clear and bright enough to be seen in most environments. It’s also highly accurate, going toe-to-toe with a far more expensive tuner I own!

This unit functions like a dream. Materials are solid, performance is great, and the reduced size means FAR more room for other, more exciting stomp boxes!

Wile E.

April 30, 2026

Fantastic little tuner. I love it!

This little tuner is smaller than my standalone footswitches I use for effects control. I mean, seriously, it is properly elfin petite. It's also very, very good and it comes very well presented in some ingeniously elegant packaging. Inside the box is the tuner, instructions, and two sizes of precut double hook that you stick to the back of the tuner for attachment to your pedalboard.

This thing is indeed true bypass and there is absolutely NO noise or interference when the tuner is switched to standby. The tuning is super accurate and it agrees with my other tuners that I have trusted for years. Operation is super simple. Press to turn on, press again to switch from bypass to tuning. A long press from either mode shuts it off, and the signal still travels through when powered down. Getting it to adjust to a different A4 it a bit more of a faff, requiring multiple short stomps while in the tuning screen, but hey, it works, and doesn't take long to get used to.

This is now the default tuner on my main board. The small size allows for more real estate for other effects and the dial is easy to read and understand. It feels properly durable and I have no doubt it will last quite a long time with regular use. Totally worth the asking price!

Xammblu

April 27, 2026

Incredible! Finally rugged built tuner with a minimal footprint for your board

This is the tuner my pedal board has been waiting for! As you can see in my photo it is about 1/3 the height of my TC Electronics Compressor that is the perfect size for my cramped pedal board. Operation is stupid simple, just step down on the pedal for about 2 seconds to engage the tuner, tune up, and then another 2 second press to disengage. When the tuner is in bypass mode it'll show a white horizontal line on the display. Don't toss that included

little box (see my photo) it includes more detailed instructions of how u can increase the range by 1hz as well as a few strips of Velcro for your pedal. Built like a tank, priced to see, this is a winner. SWIFF Audio has come out with a few bangers recently. Besides this tuner I also adore their WT09a wireless system.

An Excellent Guitar Tuner that Fits in your Pocket or Guitar Case!

As a guitarist nothing is more important to us than making sure that our guitars are in tune when we're playing live or in the studio! There is nothing more frustrating than hearing a guitarist that's Out Of Tune because it sticks out like a sore thumb!

This particular guitar tuner from Swiff Audio is fantastic! First of all I love the fact that it's completely made of metal except for the lens which covers the LED screen letting you know exactly what tuning your guitar string is in! It features an instrument cable port in and a bypass out as well as a 9-volt port on the top! This product is super easy to use and as you can see in my attached photos it Tunes my Gibson Les Paul perfectly!

Another great feature of this product is that it's small enough to literally fit in your pocket or in your guitar case! It's super portable, super easy to use and helps give you the peace of mind that you are playing your guitar in tune! Therefore, based in my review I am rating this product five stars because it truly is an excellent guitar tuner and it's also very well built!⭐⭐⭐⭐⭐

Very impressive bypass tuner in a stomp style mini pedal

This is possibly the smallest stomp style in line tuner and it’s very impressive. You can use it as a stand alone trusty tuner for your guitar, bass or even orchestra strings, or put it in line with your other pedals as this is truly a bypass tuner when not switched to tuning mode. This is great for live performances where you need to tune quickly in between songs. Bright visual display is rated to be seen in both daylight and blackout environments. It also features a customizable htz range. Please note that you will need a 9V adapter to power (not included)