About
Web Captioner is a free, browser-based real-time captioning tool that uses the Web Speech API to convert spoken audio into on-screen text instantly. It requires no software installation and works directly in a compatible web browser, making it accessible to a wide range of users including content creators, educators, and event organizers. The tool is widely used for live streaming overlays, video production, virtual meetings, and accessibility purposes. Users can customize the appearance of captions — including font, size, color, and background — and export transcripts of recorded sessions. It integrates seamlessly with broadcasting software like OBS via browser source. Web Captioner was developed by Curt Grimes, a frontend software engineer experienced in Vue and React applications. The project is focused on democratizing live captioning by offering a no-cost, no-install solution that leverages modern browser speech recognition capabilities.
Key Features
- Real-Time Speech-to-Text: Converts spoken audio to on-screen captions instantly using the browser's built-in Web Speech API, with no additional software or plugins required.
- Customizable Caption Display: Users can adjust font type, size, color, and background to match their branding or streaming setup, with live preview of changes.
- OBS & Streaming Integration: Captions can be overlaid onto live streams via a browser source in OBS Studio or similar broadcasting software, making it popular among video content creators.
- Transcript Export: Session transcripts can be saved and exported, providing a written record of spoken content for post-production or documentation purposes.
- No Account Required: The tool is accessible immediately without sign-up, login, or installation — just open the browser and start captioning.
Pros
- Completely Free: Web Captioner is available at no cost with no paywalled tiers, making it accessible to individuals and small organizations alike.
- Zero Setup: Runs entirely in the browser with no downloads or extensions needed, drastically reducing the barrier to entry for live captioning.
- Streaming-Ready: Out-of-the-box compatibility with OBS browser sources makes it a practical tool for live streamers needing real-time caption overlays.
- Accessibility-Focused: Helps make live events, presentations, and streams more accessible to deaf or hard-of-hearing audiences without specialized hardware.
Cons
- Browser & Mic Dependent: Accuracy and availability depend on the browser's Web Speech API support and microphone quality, which can vary significantly across environments.
- No Offline Mode: As a web-only tool, it requires a stable internet connection and does not function offline or as a standalone desktop application.
- Limited Language & Accuracy Control: Speech recognition is powered by the browser's built-in engine, offering limited control over accuracy tuning, custom vocabularies, or speaker disambiguation.
