コメント保存 for YouTube Live, created by an independent developer, is a Chrome extension that captures and archives live chat messages from YouTube broadcasts in real time. It records standard messages, Super Chats, and membership notices and exports logs in CSV or JSON for analysis. Key capabilities include automatic recording on stream start, in-page embedding, and filtering by user or keyword. The extension suits creators, researchers, and fans who need a local record of ephemeral live interactions.

What the extension does for archival and research

The extension captures the chat text the browser displays and preserves replayed chats when Live Chat Replay is enabled. Because it reads the page instead of using external APIs, it requires no API keys, which simplifies setup. This approach makes the tool practical for archiving message histories, recording Super Chat amounts and membership markers, and assembling datasets that otherwise vanish after a broadcast.

How it performs under heavy chat load

The extension is designed to handle high-velocity chat environments without missing messages, and the developer reports lightweight performance that does not significantly impact browser speed during live viewing. Operating in-page reduces additional network requests compared with external capture services. Resource use will depend on system hardware and chat volume, but the extension minimizes visible lag while large numbers of messages arrive.

Data handling, exports, and analysis-ready logs

Captured chat is stored locally and can be exported in analysis-friendly formats. Supported export choices include CSV and JSON, which let users open logs in spreadsheet programs or feed them into scripts. Typical end uses include:

• spreadsheet review and moderation logs
• timestamped datasets for quantitative research
• fan archives preserving donation metadata

How it fits into cross-browser workflows

The extension runs on Chrome and other Chromium-based browsers across desktop platforms, so teams can adopt the same capture steps on different machines. Built-in sorting and filtering let users prepare exports in the browser before saving, reducing reliance on server-side tooling. This keeps capture, organization, and export within a desktop workflow familiar to creators and analysts.

Best for users who need browser-based chat archives, with a replay dependency

The extension is a practical, browser-contained choice for creators, researchers, and fans needing immediate access to chat records and files ready for analysis. Because it depends on the chat rendered in the browser, streams without replay or with private archives cannot be recovered. Test the capture on a short broadcast before relying on the tool for long events to confirm it matches your archival workflow.