The Tuner I Always Wanted
Guithub is a free, online tuner for guitar, bass, ukulele, and banjo with real-time pitch detection. Support for Drop D, DADGAD, Open G and other alternate tunings. Built for live performance.
That moment when your tuner betrays you
You are three songs into a set. The bar is loud. Someone requests a song in Open D, and you need to retune between songs.
You rush it. You trust your clip-on tuner. You start playing.
Something sounds wrong.
You realize mid-song that you are flat on the low E. Everyone can hear it. That sinking feeling in your stomach - that is what I built Guithub to prevent.
What this is
Guithub is a fast, free online guitar tuner built for playing music live.
It is designed to be easy to use, reliable under pressure, and flexible enough to handle the tunings real musicians actually use.
No ads. Ergonomic design. Quickly accessible. It's a tuner that works when you need it.
Who this is for
You have probably been here before:
- Changing tunings between songs at a live gig
- Struggling with a clip-on tuner in a noisy bar
- Googling "what tuning is Black Dog by Led Zeppelin" mid-setlist
- Wondering why every tuner app wants $4.99/month for features you will never use
- Just wanting a tool that works without thinking about it
If that sounds familiar, this tuner was built for your workflow.
Supported instruments:
- Guitar tuner (6-string)
- Bass tuner (4-string)
- Ukulele tuner
- Banjo tuner (5-string)
- Chromatic tuner (any instrument)
Popular tunings: Standard, Drop D, Open G, Open D, DADGAD, Half-step down
How this is different
Most online tuners are built to maximize pageviews, not help you tune. You know the type - walls of ads, buried functionality, pop-ups asking you to upgrade.
Guithub is intentionally opinionated in the opposite direction.
It prioritizes:
- Ease of use over features
- Keyboard shortcuts over menus (press Cmd+K to switch tunings instantly)
- Real-world tunings over novelty
- A clean interface over marketing copy
The homepage is the product. It will always be that way.
Try it yourself
Open the guitar tuner in another tab right now. Play your low E string. Watch it detect the note in real-time.
Then press Cmd+K (or Ctrl+K on Windows), type "drop", and hit Enter. You just switched to Drop D. No menu hunting. No ads. No friction.
Playing a song with a capo? No problem. Select the tuning you want, then set the capo position.
Does your setlist say "Standard Tuning, half-step down"? You can do that too.
If it earns a spot in your workflow, bookmark it. If it saves you from a rough moment at a gig, consider leaving a tip.
How it works
Guithub runs entirely in your browser using the Web Audio API.
Privacy-first:
- Audio is processed locally on your device
- Audio is not recorded, uploaded, or stored
- Works offline once installed as an app
Technically reliable:
- YIN algorithm for pitch detection (industry standard)
- Median filtering reduces noise from ambient sound
- Smart note-hold prevents display flickering
Performance optimized:
- Sub-100ms latency from string pluck to display
- Works on laptops, tablets, and phones
- Minimal CPU usage for extended sessions
The goal is to be useful, fast, predictable, and accurate - whether you are tuning at home or between songs on stage.
Why I built it
Picture this: you are covering “Lump Sum” by Bon Iver (Open D), followed by “I Will Follow You Into the Dark” (Standard tuning, capo 5th fret).
You have maybe 90 seconds between songs to retune six strings and not sound like a mess.
I have owned just about every kind of tuner: clip-ons, pedals, built-ins, mobile apps. They all worked fine in quiet rooms. Under pressure, they fell apart. Too slow. Too cluttered. Locked to standard tuning. Or worse, forcing you to do mental math to figure out what note you should actually be aiming for.
When you are playing live, you do not want to think. You want to trust the tool and move on.
What I wanted was a tuner that made alternate tunings feel safe. Drop D. Open G. Open D. DADGAD. The tunings that show up in real music, presented clearly, without friction.
If I could trust the tuner, I could trust the tuning every time.
That is the problem Guithub solves.
Why a browser-based tuner
I already use a laptop during live performances, so putting a tuner in the browser fit naturally into my setup.
During the COVID pandemic, I also played a lot of music online. I ran a weekly livestream on Twitch and YouTube. Everything about that setup was browser-first, and it reinforced a simple idea: a tuner should be something you can just open and use, wherever you are playing.
A browser-based tuner means:
- No app to install
- No hardware to forget
- No friction getting started
Guithub is also installable as a standalone app. Once installed, it behaves like a native application and continues to work offline, since all audio processing happens client-side.
If you can open a tab or an app, you can tune.
About me
My name is Mike Bifulco. I am a software engineer and a lifelong musician.
I have spent years playing live, both in person and online, and building software for a living. Guithub sits right at the intersection of those two worlds.
This is a tool I wanted for myself. I am sharing it in case it is useful to you too.
Roadmap
From my testing, the tuner works great. It solves the problem I set out to solve. But there are a few enhancements that would make it even more useful:
- ✅ Support for multiple instruments: Support for Guitar, Bass (4-, 5-, and 6-string), Ukulele, and Banjo, with tunings for each.
- ✅ Deeplinking (Now Available!): Share links to specific tunings (e.g. Open D with a capo on the 4th fret).
- ✅ Capo support (Now available!): Select a tuning and apply a capo (Drop D) with a capo on the 4th fret) for perfect intonation no matter where your capo is clipped
- Chromatic tuner (Coming soon!): Tune to arbitrary notes
- Custom tunings: Create an account to save your own setups
- Setlist support: Import your setlist and get the tunings for each song
- Song lookup: Search for a song and get its tuning instantly
The core tuner will always be free and ad-free. These features would live alongside it.
About the tip jar
Guithub is free to use.
There is an optional tip button for people who find it useful and want to support the project. The checkout is powered by Stripe, which is a small nod to my past life working on the Stripe Developer Relations team.
Tips are appreciated, but never expected.
Ready to tune?
Whether you are about to play a gig, practice at home, or just need to check your tuning quickly, Guithub is ready when you are.
Open the tuner and give it a try. If it earns a permanent spot in your bookmarks, that is all I could ask for.
Give 'em hell out there, friends. 🎸