SignBridge
Inclusive communication for Deaf & hearing people

A live bridge betweensign and speech

SignBridge lets Deaf and hearing people talk, collaborate, and learn together. Type and a signing avatar appears. Sign to the camera and it becomes text — and is spoken aloud. Two directions, one shared screen, in real time.

Real-timeRuns in your browserNo sign-up

Why it matters

Built around how Deaf people actually communicate

Captions alone leave many people out. For signers whose first language is sign — not written English — a faithful signing avatar is the difference between reading and understanding.

70M+

Deaf people use sign language worldwide

World Federation of the Deaf

300+

distinct sign languages in active use across the globe

World Federation of the Deaf

Full

natural languages — sign has its own grammar; it is not signed English

Linguistic consensus

How you use it

Two ways to bridge a conversation

The same two-way engine, in the room or across the world.

Available now

In person, one shared device

Both people are together and pass — or place — a single phone or laptop between them. The hearing person types and the Deaf person watches the signing avatar (ideal for signers who don't read written English). The Deaf person signs to the camera and clear text appears, spoken aloud for the hearing person.

Coming soon

Remote, like a video call

A Zoom-style experience that carries the very same bidirectional bridge across distance — sign on one side, speech and text on the other — so distance is no longer a barrier to an inclusive conversation.

How it works

A bridge that runs both ways

Pick the direction that matches who is communicating. Both live side by side in the same session.

Hearing → Deaf

Type or speak → Sign

  1. 1Type a message, or talk into the mic.
  2. 2Optional AI cleanup tidies punctuation and stray words.
  3. 3A skeleton avatar signs it in ASL using the open sign.mt pose engine — readable even for those who don't read English.
Deaf → Hearing

Sign → Text & Voice

  1. 1Turn on the camera and sign whole words (HELLO, THANK YOU, YES…).
  2. 2On-device hand tracking recognizes each sign and builds a sentence.
  3. 3After a short pause the sentence appears as text and is spoken aloud.

Principles

Thoughtful tech, calm design

Grounded in open sign-language research and built to be understood in seconds.

Private by design

The camera and hand-tracking run entirely in your browser. Nothing is uploaded, no account is needed.

Made for learning

Built for classrooms, study groups, and one-on-one practice — a patient companion, not a replacement for interpreters.

Reads and speaks

Signs become on-screen text and are spoken aloud, so a hearing partner can both read and hear the message.

Open technology

Powered by the open-source sign.mt pose engine and Google MediaPipe hand tracking — transparent, not a black box.

SignBridge

Start a conversation without barriers

No install, no sign-up. Open SignBridge and try both directions in under a minute.

Open SignBridge

A project by team

Gravity

Bending the distance between Deaf and hearing — so every conversation has its own pull toward understanding.