SonicCaption

A browser extension that provides real-time bilingual subtitles for videos, streams, and online classes, solving the problem of understanding content in a foreign language without manual uploads. It targets individuals and teams, including language learners, professionals in meetings, and students, across consumer and business segments. The extension works directly in the browser tab, offering low-latency captions and dual subtitles, with a privacy-aware design that processes only text segments.

Key features

• Real-time low-latency subtitles (~0.5s)
• Dual subtitles: original and translation
• Universal compatibility with any audio tab
• No manual uploads, works in browser
• Privacy-aware: only text segments processed
• Supports multiple languages
• Works with Zoom, Meet, YouTube, Netflix
• Free tier with 20 minutes/month