Free Online Guitar Tuner (No Download)
Quick & Easy Tuning via Microphone
Welcome to The Acoustic Shoppe’s Free Online Tuner! Whether you’re a beginner picking up your first guitar or a pro who just needs a quick pitch check, our browser-based tuner is here to help. This tool uses your device's microphone to detect your pitch in real-time—no downloads or apps required.
While an online tuner is a great "emergency" tool for convenience, remember that for the highest precision and performance in noisy environments, nothing beats a dedicated hardware tuner.
How to Use This Tuner
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Grant Access: Click the "Start" or "Allow" button when your browser asks for microphone permission.
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Find Quiet: For the most accurate reading, try to minimize background noise.
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Pluck a String: Play a single string (like your Low E) and let it ring. Hold your guitar’s soundhole near your phone or computer mic.
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Tune Up: * If the needle is to the left (Flat), tighten the tuning peg.
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If the needle is to the right (Sharp), loosen it and then tune back up to the note.
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When the display turns Green, you’re in tune!
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Repeat: Go through all six strings (E-A-D-G-B-e) and double-check the first one when you’re finished.
Upgrade Your Precision: Top-Selling Tuners at The Acoustic Shoppe
While this online tool is perfect for a quick fix, a professional clip-on or soundhole tuner provides better accuracy, works in crowded rooms, and saves your mobile battery. Check out the favorites used by our staff and customers:
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Peterson StroboClip HDC – The Pro Choice. High-definition color screen and strobe accuracy to 1/10th of a cent.
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D'Addario Eclipse Headstock Tuner – Best Value. Fast, accurate, and available in a variety of colors to match your style.
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D'Addario Nexxus 360 Rechargeable – No Batteries Needed. A bright LED screen and a rechargeable battery that lasts for hours of playing.
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D'Addario Micro Soundhole Tuner – Discreet & Constant. Stays hidden inside your soundhole so you can tune silently during a set.
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D'Addario Eclipse Rechargeable – Modern Convenience. The same great Eclipse performance with easy USB charging.
View Our Full Collection of Tuners & Accessories →
Why Is My Guitar Not Staying in Tune?
If you’ve used the tuner but your guitar still feels "off," it could be due to old strings, humidity changes, or a need for a professional setup. Every guitar sold at The Acoustic Shoppe includes our world-class 23-Point Setup to ensure maximum tuning stability.
Need a hand? Contact our expert luthiers today.
