About Our Viola Tuner

Why Choose Our Viola Tuner?

Our free online viola tuner is designed specifically for viola players. With 6 built-in tuning presets, a string-by-string tuning guide, and automatic string detection, it's the easiest way to get your viola in tune — whether you're a beginner or an experienced player. The viola is tuned C3-G3-D4-A4 (CGDA), a perfect fifth below the violin.

Key Features

• 6 viola tuning presets: Standard CGDA, Open C, Open G, Half Step Down, and more
• String-by-string tuning with visual string selector
• Auto-detect which string you're playing
• Real-time pitch detection with cents deviation display
• Mobile-friendly interface that works on any device
• No installation required — works directly in your browser
• Free to use with no hidden costs

How It Works

Our viola tuner uses an autocorrelation-based pitch detection algorithm to accurately identify the frequency of the note you play. It then matches the detected pitch to the closest string in your selected tuning and shows you exactly how many cents sharp or flat you are from the target note. All audio processing happens locally in your browser — nothing is recorded or sent to any server.

Our Mission

We believe that every viola player deserves access to a high-quality tuning tool. That's why we've created a free, accessible viola tuner that works for everyone — from beginners picking up their first viola to seasoned players exploring alternate tunings.