Conversation

Sign to build a sentence, then speak it. Replies are captioned live.

Camera off

Sentence builder

Words recognized from your gestures collect here
No words yet — sign a gesture to begin.

Transcript

Both sides of the conversation, in order
chat_bubble Nothing said yet Your signed sentences and their spoken replies will appear here.

Classroom mode

Large, high-contrast captions built for the front of a room.

Waiting for a gesture or a spoken reply
Turn on classroom mode to project captions here.

Why classroom mode

Text scales up, colors simplify to a single high-contrast panel, and a raised-hand signal lets a student flag that they want to speak next without saying a word — useful when a teacher is addressing the group and a student is composing a longer thought.

Emergency phrases

Fixed phrases that speak instantly. No network call, no delay.

wifi_offWorks fully offline — these phrases never depend on a network connection.

Automatic trigger

A hands-free way to call for help

Holding a closed fist steadily in view of the camera for about two seconds speaks the top emergency phrase automatically, even if this tab is showing another screen. A ring around the camera preview fills as it counts down.

Custom gestures

Teach SignBridge a personal gesture and the phrase it should mean.

Add a gesture

Saved gestures are checked before the built-in library
Enter a phrase, then press and hold the record button while making the gesture in front of the camera for two seconds.

Saved gestures

0 saved this session
front_hand No custom gestures yet Gestures you record are kept for this session, on this device.

Settings

Language, sensitivity and privacy controls.

Language

Conversation languageUsed for spoken output, live captions, and composed sentences
VoiceText-to-speech voice for composed sentences

Recognition

Confidence thresholdGestures below this confidence are flagged as unsure instead of guessed
60%
Hold time to confirmHow long a gesture must be held before it is accepted
550ms

Camera

Camera accessNot started

Privacy

Hand landmark detection and gesture matching run entirely in this browser tab. Video frames are never transmitted anywhere. The only data that ever leaves this device is the short list of recognized words, and only when you choose to compose an AI sentence — emergency phrases and instant-speak gestures never make a network call at all.