Sign4K – Sign Language Companion

Turn captions into American Sign Language. A 3D signer signs videos and Meet, Zoom and Teams calls word by word, live.

Sign4K turns captions into American Sign Language (ASL), live. Turn on captions, click the Sign4K icon and press "Sign the captions on this page". A friendly 3D signer appears next to the video and signs along as you watch. It works on YouTube, on other video sites with captions, and on video calls. WHAT IT DOES • Signs captions live, word by word, with realistic two-handed 3D signers • Signs video calls on Google Meet, Zoom and Microsoft Teams in Chrome, and shows who is talking • Fingerspells names and rare words letter by letter, the way ASL does • Signs any text you select: right-click and choose "Sign this with Sign4K" • Shows the caption under the signer and lights up each word as it is signed • Speed control, plus "Sync video", which pauses the video while the signer catches up • Two signers to choose from: Daniel and Michelle • Keeps a list of the words you met in videos, so you can practise them later • Every sign has a "Learn" button that opens it in the free Sign4K Academy ALWAYS GETTING BETTER Sign4K knows more than 500 signs and understands about 6,700 English words. New signs arrive in the extension automatically, with no reinstalling. PRIVATE BY DESIGN • No account, no ads, no tracking • Captions and selected text are turned into signs on your own computer and are never sent anywhere • Sign4K never uses your microphone and never records your calls • The only thing it downloads is the latest sign library from sign4k.com GOOD TO KNOW Sign4K signs word by word and doesn't follow full ASL grammar yet. It helps with learning and everyday access, but it doesn't replace a human interpreter. For medical, legal or emergency situations, please use a qualified interpreter. LEARN ASL FOR FREE Sign4K Academy (sign4k.com/learn) has lessons, practice and a full dictionary with a 3D teacher. Free forever, no sign-up. Sign4K is free to install, and every feature works without an account. Questions, or a sign that looks wrong? Write to hello@sign4k.com. We read every email.