What fingerspelling is
Fingerspelling is part of American Sign Language, not a separate code. Fluent signers fingerspell proper names, brand names, technical terms, and new vocabulary that has no established sign yet, then often invent or adopt a sign for frequent words. If you are learning ASL, the manual alphabet is usually the first thing you learn, because it lets you spell anything from day one.
Twenty-four of the 26 letters are static hand shapes: you form the shape and hold it. Two letters move: J traces a J in the air with the pinky, and Z traces a Z with the index finger. Fingerspell checks both the shape and the movement.
The 26 letters
Every letter below is a lesson in the app, with a reference diagram, step-by-step shaping tips, and live camera feedback:
| Letter | How to shape it |
|---|---|
| A | Make a fist, then stick your thumb up along the side of your index finger |
| B | Flat hand, fingers together, thumb folded across your palm |
| C | Curve your hand like holding a cup, with a clear gap |
| D | Index finger up, thumb touching your middle finger in a small circle |
| E | Curl all fingers down and lay your thumb across the fingertips |
| F | Touch thumb to index (OK sign), other three fingers straight up |
| G | Point your index finger and thumb sideways, like a finger gun |
| H | Index and middle fingers together, pointing sideways |
| I | Pinky straight up, thumb tucked across your palm |
| J | Pinky up, then draw a J in the air: straight down, then hook |
| K | Index and middle in a V, thumb pushed up between them |
| L | Index finger up, thumb straight out: a crisp L corner |
| M | Fist with your thumb tucked under three fingers |
| N | Fist with your thumb tucked under two fingers |
| O | Curve every fingertip onto your thumb: a round O |
| P | Make a K, then tip your wrist so the fingers point down |
| Q | Make a G, then tip your wrist so index and thumb point down |
| R | Cross your middle finger over your index finger |
| S | Fist with your thumb lying across the front of your fingers |
| T | Fist with your thumb tip poking up between index and middle |
| U | Index and middle fingers up, pressed tightly together |
| V | Index and middle spread in a V, thumb tucked in |
| W | Three fingers up: index, middle and ring |
| X | Hook your index finger like a claw, other fingers closed |
| Y | Thumb and pinky stretched out, middle fingers folded |
| Z | Index finger up, then draw a Z: across, diagonal, across |
The two moving letters: J and Z
J starts as an I hand (pinky up) and traces a J: straight down, then a clear hook to the side. Z starts as a D hand (index up) and traces a Z: across, diagonal, across, like writing on a window. Fingerspell watches the path your fingertip takes and only passes the letter when the movement has the right shape, a straight drop is not a J and a straight line is not a Z.
How Fingerspell works
- Open the app at toollantern.win/asl-fingerspelling on your phone or computer. Nothing to install.
- Pick a letter and study the reference diagram and shaping steps.
- Hold up your hand to the camera. The app checks your hand shape live and gives one specific hint at a time, such as spreading your fingers or tucking your thumb, until the letter looks right. For J and Z it checks your traced path too.
- Quiz mode hides the reference and tests whether you remember all 26 letters, with points and streaks.
- Your progress is saved on your device only. The camera turns fully off when you leave a lesson.
Your video never leaves your device
Everything in Fingerspell runs on your device. Your camera feed is analyzed locally by a hand-tracking model that ships with the app, and a strict security policy blocks the page from contacting any outside server. There is no account, no analytics, and no recording. After your first visit the app saves itself to your device and works fully offline.
Start learning fingerspelling free
Fingerspell is a home practice tool, not a teacher. Feedback is automatic and can be wrong. For real instruction, learn from Deaf teachers and the Deaf community: the app links to respected resources including ASL University (Lifeprint) and Handspeak on its about page.