Free Online Ukulele Tuner

You can tune a ukulele without an electronic tuner using the relative fret method based on standard re-entrant tuning (g-C-E-A):

1. Establish a Base Pitch (String 3 - C): If you have an external reference note (such as Middle C on a piano at 261.63 Hz, a tuning fork, or an online audio tone), tune your 3rd string (C) to it. If not, assume your 3rd string is roughly in pitch to tune the ukulele relative to itself.
2. Tune 2nd String (E): Press the 3rd string (C) down at the 4th fret (producing note E4 at 329.63 Hz). Pluck it, then immediately pluck the open 2nd string (E). Adjust the 2nd string's tuning peg until both notes match and any pulsating frequency beats disappear.
3. Tune 1st String (A): Press the 2nd string (E) down at the 5th fret (producing note A4 at 440.00 Hz). Pluck it, then pluck the open 1st string (A). Turn the 1st string peg until both ring in unison.
4. Tune 4th String (High g): Press the 2nd string (E) down at the 3rd fret (producing note G4 at 392.00 Hz). Pluck it, then pluck the open 4th string (high g). Adjust the 4th string peg until both notes match in pitch.
5. Check Chords: Strum an open C Major chord (holding fret 3 on the 1st string) and an F Major chord to ensure sweet, ringing acoustic harmony across all four strings.

Tuning a ukulele with an electronic or online microphone tuner is fast, easy, and precise:

1. Launch Tuner & Enable Audio: On AllTuners.com, click "Turn On Tuner" and grant microphone permission in your browser. If using a clip-on tuner, clamp it firmly to the headstock.
2. Understand the 4 Ukulele Strings: Standard ukulele tuning from top to bottom is:
   • 4th String: High g4 (392.00 Hz)
   • 3rd String: C4 (261.63 Hz) - lowest sounding note in standard tuning
   • 2nd String: E4 (329.63 Hz)
   • 1st String: A4 (440.00 Hz)
3. Pluck One Open String: Pluck the 4th string (g) using the soft pad of your thumb. Rest your fretting fingers across inactive strings to prevent sympathetic ringing.
4. Read the Needle & Adjust Peg:
   • Needle to the Left (Flat): Turn the tuning peg to tighten the string and raise pitch.
   • Needle to the Right (Sharp): Loosen the peg slightly below pitch, then tighten up into center lock.
   • Needle Centered (0 cents / Emerald Green): Stop—your string is locked in tune.
5. Repeat Across All Strings: Repeat for strings C, E, and A. Because ukulele bodies are lightweight and flexible, changes in string tension can affect the other strings, so always perform a quick second pass.

To use any digital, clip-on, or browser-based ukulele tuner effectively, follow these core principles:

• 1. Select the Right Mode: Set your tuner to "Ukulele" (U mode) or "Chromatic" (C mode). Ensure calibration is locked to standard concert pitch (A4 = 440 Hz).
• 2. Position for Clean Signal Capture: If using a web tuner like AllTuners, sit 1 to 2 feet in front of your phone or laptop in a quiet room. If using a clip-on piezo tuner, clamp it securely to the tip of the headstock.
• 3. Pluck Gently with Your Thumb: Strike the open string using the pad of your thumb rather than a hard pick. A thumb pluck accentuates the warm fundamental frequency and minimizes harsh harmonic overtones, allowing the tuner's pitch detection algorithm to track with sub-cent accuracy.
• 4. Watch the Cents Indicator: Cents measure micro-deviations from perfect pitch. Rotate the corresponding machine head slowly until the needle settles at 0 cents (within ±3 cents).

If you are a beginner tuning your first ukulele, follow these simple, fail-safe rules:

1. Remember the String Names: Use the classic memory rhyme "Good Children Eat Apples" or "My Dog Has Fleas" for strings G - C - E - A. String 4 (G) is closest to your face when holding the ukulele; String 1 (A) is closest to the floor.
2. Trace Each String to Its Peg: Before turning any peg, use your index finger to physically follow the string from the bridge, over the fretboard nut, and directly to its tuning post. Turning the wrong peg is the #1 reason beginners snap strings!
3. Turn Pegs in Small Quarter-Turns: Nylon strings are very responsive. Turn the tuning knob slowly while continuously plucking every second to hear the pitch rise or fall.
4. Always Tune Up into Pitch: If the tuner indicates your string is sharp (too high), loosen the peg until it is slightly flat, then tighten up into the green center. This prevents gear backlash and keeps your ukulele in tune longer.
5. Don't Panic If It Goes Out of Tune Quickly: Brand new nylon and nylgut strings stretch continuously for the first 3 to 7 days. Retuning before every practice session is completely normal.

Yes, absolutely! However, how you use it depends on the tuner's mode:

• If Your Guitar Tuner Has "Chromatic Mode" (Recommended): Switch the mode button to "C" (Chromatic). A chromatic tuner detects all 12 semitones of the musical scale automatically. It will effortlessly recognize your ukulele's G4 (392 Hz), C4 (261.63 Hz), E4 (329.63 Hz), and A4 (440 Hz) notes.
• If Your Guitar Tuner Is Fixed to "Guitar Mode" (G Mode): In guitar-only mode, the tuner specifically expects the six guitar notes (E2, A2, D3, G3, B3, E4). Because a standard guitar does not have open C or high A strings, a guitar-mode tuner will often fail to register ukulele strings 3 and 1.
• For Baritone Ukuleles: A standard guitar tuner in guitar mode works right out of the box! Baritone ukuleles are tuned D3-G3-B3-E4, which are the exact same notes and octaves as the top four strings of a guitar.
• Best Solution: Use AllTuners.com directly in your browser. It has a dedicated ukulele mode calibrated specifically for ukulele harmonic overtones and high-g re-entrant physics.

Using a tuner for ukulele requires tailoring your approach to the lightweight acoustic nature of the instrument:

1. Control Ambient Room Noise: Because ukulele bodies are small and quiet, background noise like talking, television, or fans can confuse acoustic microphones. Sit close to your microphone or use a clip-on contact tuner in noisy environments.
2. Damp Adjacent Strings: Place your left palm lightly across strings you aren't currently tuning so they don't ring out in sympathy and create confusing multi-note interference.
3. Let the Note Ring Cleanly: Give the open string a steady, moderate pluck and allow it to ring for 2 seconds. Avoid repeatedly flicking the string rapidly, which causes rapid pitch fluctuations (transient attack spike) before the fundamental pitch settles.
4. Observe the Real-Time Needle: Adjust the peg until the needle holds steady in the emerald green target zone.

Yes, you can tune a ukulele with a guitar tuner as long as the tuner has a Chromatic (C) setting or if you are tuning a Baritone ukulele:

1. Check for a "Mode" Button: Look at your digital or clip-on guitar tuner. Press the Mode / Power button until the letter "C" (for Chromatic) appears instead of "G" (Guitar). In Chromatic mode, the tuner will recognize any ukulele note (G, C, E, A) instantly.
2. Why Guitar-Only Mode Won't Work for Standard Ukulele: Standard guitar tuners look only for E, A, D, G, and B at lower guitar octaves. A standard ukulele requires C4 (261.63 Hz) and A4 (440 Hz), notes which do not exist on open guitar strings.
3. Direct Compatibility with Baritone Ukulele: If you play a Baritone ukulele (D-G-B-E), you can use any guitar tuner in standard Guitar mode because strings 4, 3, 2, and 1 match the 4th, 3rd, 2nd, and 1st strings of a guitar exactly.

Here is how to mount and operate a physical tuner directly on your ukulele:

1. Attach Securely to the Headstock: Fasten the rubberized clip of a clip-on tuner to the upper rim or tip of the ukulele headstock. Ensure the padded jaws grip wood firmly without touching any of the four tuning pegs or pinching strings over the nut.
2. Position the Swivel Display: Rotate the 360-degree ball joint so the display screen points directly toward your face while you hold the ukulele in comfortable strumming position.
3. Power On & Set to Ukulele (U) Mode: Turn the tuner on. Many clip-on tuners have a dedicated "U" mode (and even sub-modes for "U-C" Standard C tuning vs "U-D" D-tuning). Select U-C.
4. Tune Each String One by One: Pluck string 4 (G), adjust peg 4. Pluck string 3 (C), adjust peg 3. Pluck string 2 (E), adjust peg 2. Pluck string 1 (A), adjust peg 1. When the backlight turns solid green, your string is locked in tune.

A ukulele tuner is an electronic device, mobile application, or web-based audio tool designed to detect the vibrational frequencies of ukulele strings and visually guide the musician until each string matches standard musical pitch (typically A4 = 440 Hz concert pitch).

Standard ukulele tuners analyze pitch using digital signal processing (DSP) to detect the four standard notes: g4 (392.00 Hz), C4 (261.63 Hz), E4 (329.63 Hz), and A4 (440.00 Hz). Ukulele tuners typically display:

• Note Name & Octave: Identifies which string is vibrating (e.g., C4).
• Cents Meter / Needle: Indicates whether the note is flat (left / negative cents) or sharp (right / positive cents).
• Target Lock Indicator: Illuminates bright emerald green when the pitch is within ±3 cents of pure acoustic center.

Common formats include browser-based microphone tuners (like AllTuners.com), clip-on vibration tuners (such as Snark or D'Addario), and synthetic ear-training reference plucks.

When you are playing outdoors, traveling, or don't have internet or a tuner available, you can tune your ukulele using two reliable acoustic techniques:

• The 4th & 5th Fret Method (Self-Tuning):
  1. Play the 3rd string (C) open. Then hold down the 4th fret of the C string—this produces E. Pluck the open 2nd string (E) and adjust its peg until both notes ring identically.
  2. Hold down the 5th fret of the E string—this produces A. Pluck the open 1st string (A) and adjust its peg until it matches in unison.
  3. Hold down the 3rd fret of the E string—this produces G. Pluck the open 4th string (high g) and adjust its peg until both notes match.
• Tuning to an External Song or Keyboard: If you have a piano, electric keyboard, or another instrument nearby, play Middle C (C4 at 261.63 Hz) and match your 3rd string. Once string 3 is accurate to concert pitch, relative tuning will ensure the entire ukulele is in concert pitch.

To tune your ukulele with a handheld digital electric tuner or clip-on electronic tuner:

1. Turn On the Unit: Press the power button and inspect the LCD display. Verify that calibration is set to 440 Hz and the mode indicates "U" (Ukulele) or "C" (Chromatic).
2. Position the Tuner: If using a tabletop electric tuner with a built-in condenser mic, place it on a table or music stand 6 to 12 inches from the soundhole. If using a clip-on electric tuner, clamp it firmly to the headstock.
3. Pluck Strings Sequentially: Pluck the 4th string (G), 3rd string (C), 2nd string (E), and 1st string (A) one at a time.
4. Watch LCD Visual Feedback:
   • Flat (Needle Left / Red Backlight): Turn the peg counter-clockwise (tighten) to raise the pitch.
   • Sharp (Needle Right / Red Backlight): Loosen the peg slightly below the center, then tune upward into the note.
   • In Tune (Needle Center / Green Backlight): Stop once the screen turns bright green.
5. Power Off: Turn off the electronic tuner after tuning to preserve the CR2032 coin cell battery.

The best ukulele tuner depends on your budget, playing setting, and whether you prefer an online tool or a physical accessory:

• Best Free Online Ukulele Tuner: AllTuners.com. High-precision McLeod Pitch Method (MPM) audio DSP calibrated for nylon ukulele strings, supports High G, Low G, and Baritone tunings, includes interactive audio pluck chords and metronomes, 100% free with no ads, and works offline as a PWA.
• Best Clip-On Ukulele Tuner: Snark SN6X Ukulele Tuner. Engineered specifically for the higher frequencies of soprano, concert, and tenor ukuleles with a full-color 360-degree rotating display and high-sensitivity vibration sensor.
• Best Discreet Stage Tuner: D'Addario NS Micro Ukulele Tuner. Clips discretely to the back of the headstock, completely hidden from your audience, featuring a multi-color vertical display and durable ratchet clamp.
• Best Studio & Pro Intonation Tuner: Peterson StroboClip HD. Offers 0.1-cent true strobe accuracy and "sweetened" ukulele presets that adjust for fret intonation imperfections across standard soprano and tenor fingerboards.

To get the best possible tuning accuracy when operating a tuner on your ukulele, avoid these common mistakes:

• 1. Confirm Which Way Your Pegs Turn: On standard 2x2 slotted or solid headstocks, turning the bottom two pegs counter-clockwise tightens strings 1 and 2, while turning the top two pegs counter-clockwise tightens strings 3 and 4. Pluck while turning so you immediately hear whether the pitch is rising or falling.
• 2. Avoid Plucking Near the Bridge: Plucking right beside the bridge produces bright, tinny harmonic overtones that can cause digital tuners to jump octaves. Pluck directly over the 12th fret or soundhole where the fundamental wave is warmest and strongest.
• 3. Mute Idle Strings with Your Palm: Because nylon ukulele strings resonate freely inside the small wooden soundbox, sympathetic vibration from idle strings will confuse microphone tuners. Rest your fingers across strings you aren't tuning.
• 4. Always Approach Pitch from Below: If a string is sharp (+ cents), tune it down a half-step below target, then slowly turn upward until the tuner locks green. This seats the machine head gears securely against string tension.

When setting up a tuner for ukulele, ensure you have the proper calibration and tuning preset selected:

1. Confirm Standard Calibration (A4 = 440 Hz): Make sure the small reference number on your tuner screen reads 440 Hz (the international concert pitch standard). If accidentally adjusted to 442 or 432 Hz, your ukulele will sound out of tune when playing along with songs or other instruments.
2. Choose Standard "C Tuning" (gCEA): The vast majority of ukulele sheet music, tabs, and songs are written for Standard C tuning: g4 - C4 - E4 - A4. If your tuner offers "U-C" and "U-D", select U-C.
3. For Low G or Alternate Tunings, Use Chromatic Mode: If your ukulele has a wound Low G string (G3 at 196 Hz) or you are playing Slack Key (gCEG) or D-tuning (aDF#B), switch your tuner to Chromatic (C) mode so it detects any non-standard semitones effortlessly.

Tuning by ear for the first time might seem tricky, but this simple 4-step beginner method works every time:

1. Understand Your 4 Strings: Hold your ukulele. The string closest to your chin is String 4 (G), the next is String 3 (C), then String 2 (E), and the bottom string closest to the floor is String 1 (A).
2. Use String 3 (C) as Your Anchor: Keep String 3 as is. Even if it is slightly high or low compared to concert pitch, tuning the other 3 strings to match it will ensure every chord you play sounds harmonious and sweet.
3. Match String 2 (E) to Fret 4 on C: Put your finger down on the 4th fret of String 3 (C). Pluck it. Now pluck open String 2 (E). Turn the tuning peg for String 2 until both notes sound like the exact same pitch.
4. Match String 1 (A) to Fret 5 on E: Put your finger down on the 5th fret of String 2 (E). Pluck it. Now pluck open String 1 (A). Adjust peg 1 until they match.
5. Match String 4 (G) to Fret 3 on E: Put your finger down on the 3rd fret of String 2 (E). Pluck it. Now pluck open String 4 (G). Adjust peg 4 until they sound identical.
6. Strum a C Major Chord: Hold down the 3rd fret of the bottom string (A) with your ring finger and strum all 4 strings. If the chord sounds joyful and clean, your ukulele is ready to play!

Here is how to successfully tune your ukulele using any standard guitar tuner:

1. Switch Tuner to "Chromatic" Mode: Press the mode button on your guitar tuner until "C" (Chromatic) is displayed. Chromatic mode tells the tuner to recognize all 12 notes across the musical spectrum, making it fully compatible with ukulele strings (G, C, E, A).
2. Tune String 4 (High g - 392 Hz): Pluck your 4th string. The chromatic tuner will detect note G. Adjust the peg until centered.
3. Tune String 3 (C - 261.63 Hz): Pluck your 3rd string. Note C will display. Adjust the peg to center. (Note: Guitars do not have an open C string, which is why Chromatic mode is mandatory!)
4. Tune String 2 (E - 329.63 Hz): Pluck your 2nd string. Note E will display. This matches the exact frequency of the 1st string (high E) on a standard guitar.
5. Tune String 1 (A - 440 Hz): Pluck your 1st string. Note A will display. Adjust until centered at 0 cents.
6. If You Play a Baritone Ukulele: Baritone ukuleles are tuned D3 - G3 - B3 - E4. You don't even need chromatic mode—simply leave your tuner in standard "Guitar" mode, because these four notes match the 4th, 3rd, 2nd, and 1st strings of a standard guitar!

This is called re-entrant tuning (denoted as lowercase 'g' in gCEA). Unlike guitars, where strings get progressively lower as you move towards the thickest bass string, the 4th string of a standard ukulele (g4 - 392.00 Hz) is tuned one whole step lower than the 1st string (A4 - 440.00 Hz), but an entire fifth higher than the 3rd string (C4 - 261.63 Hz). This re-entrant string gives the ukulele its signature joyful, chime-like Hawaiian timbre.

From 4th string (closest to your face when holding the ukulele) to 1st string (closest to the floor):

• String 4: g4 (392.00 Hz) - Re-entrant High G
• String 3: C4 (261.63 Hz) - Lowest pitch string
• String 2: E4 (329.63 Hz)
• String 1: A4 (440.00 Hz) - Highest pitch string

A famous mnemonic to remember the tuning is: "My Dog Has Fleas" or "Good Children Eat Apples".

Yes! Soprano (standard), Concert, and Tenor ukuleles all share the exact same standard gCEA tuning at the same octaves. You can use this exact tuner for all three sizes. Only the Baritone ukulele differs, typically tuned lower to D3-G3-B3-E4 (matching the top four strings of a guitar).

Ukuleles use nylon, nylgut, or fluorocarbon strings. These synthetic materials are far more elastic than steel guitar strings and can stretch for several days or even weeks when freshly strung. To help new strings settle faster, gently pull each string away from the fretboard a few times after tuning, then tune again. Within a few sessions, the strings will hold pitch reliably.

Low G tuning replaces the high re-entrant 4th string (g4 at 392 Hz) with a low 4th string (G3 at 196 Hz), an entire octave deeper. This gives the ukulele a full two-octave linear scale ideal for solo fingerpicking and classical arrangements. Yes, you need a dedicated Low G string (often wound in metal or thicker fluorocarbon) designed for the lower frequency.

Traditional vintage and soprano ukuleles often feature friction pegs (which stick straight out the back of the headstock with no gears). If a friction peg slips, tighten the small screw on the end of the peg button with a screwdriver until it holds friction firmly without binding. Always push inward gently toward the headstock while turning.