Quickstart

This checks handshapes, not ASL. ASL is a full language with its own grammar and facial and body grammar this tool doesn't see.

1. Open Practice

Go to /practice and select Start camera. Your browser will ask for camera permission — nothing you allow here leaves your device (see Concept & eval for exactly what that claim does and doesn't cover).

2. Show the target letter

The page names a letter ("Show me: A") and gives a short text description of the standard handshape. Hold your hand up in frame, form the shape, and hold it steady for under a second.

3. Get graded live

Once the classifier holds on a stable reading, it either advances automatically (correct) or asks you to try again, naming the letter you actually held and — if it's a letter commonly confused with the target — saying so plainly.

4. No camera? No problem

If camera access is denied or your device has no camera, the same letters and hints are available as a keyboard-operable flashcard loop — no grading, but the same reference material.

What's next

A full free-practice session runs all 24 letters once, shuffled. Finish one and you can start a Drill instead — weighted toward the letters this project's own published eval says are most confusable, or toward your own weakest letters so far. See how the eval actually works, what happens when something goes wrong, or what this tool honestly can't do.