Capsula

Capsula is a free, open-source browser extension designed to export individual ChatGPT conversations directly from the browser. It provides users with the ability to save any open ChatGPT conversation as a file in Markdown, HTML, or JSON format with a single click. The extension emphasizes privacy by ensuring that all processing occurs locally within the user's browser, with no data ever leaving the device and no network requests, analytics, or telemetry involved.

The tool is available for Chrome and Firefox, installable via the Chrome Web Store and Mozilla Add-ons. Once installed, users can open a ChatGPT conversation in their browser, click the Capsula icon, and select their preferred export format. The exported files are formatted to preserve conversation structure, including code blocks, headers, and bold text, and are compatible with applications such as Obsidian, Notion, Typora, VS Code, and GitHub. Capsula operates entirely without requiring user accounts or sign-ups, and it does not request network permissions, further reinforcing its privacy-focused approach.

Capsula is positioned as a solution for those who want to quickly save or share a specific ChatGPT conversation in a chosen format, particularly when Markdown output is desired. Unlike ChatGPT's built-in export feature—which sends a ZIP file of all conversations via email—Capsula targets single conversations and delivers instant, local downloads without waiting or additional steps. The extension is maintained by Seveneves AI, and its source code is publicly available for review.

As a browser extension in the developer tools category, Capsula addresses the need for private, immediate, and flexible export of ChatGPT conversations, catering to users who value data control and seamless integration with their preferred note-taking or development tools.