Save any ChatGPT conversation as Markdown, HTML, or JSON in one click. 100% local — no data leaves your browser. No accounts, no tracking, no server. Free and open source.
Save any conversation instantly in your preferred format
Everything happens locally. No data ever leaves your browser
Perfectly formatted exports that preserve code blocks and structure
Capsula is designed with privacy at its core. No compromises.
Zero analytics or telemetry
Runs entirely in your browser
Nothing to sign up for
Capsula is a free, open-source browser extension that exports ChatGPT conversations as Markdown, HTML, or JSON files. It runs entirely inside your browser — no data is ever sent to a server, no account is needed, and there is zero tracking or analytics. Available for Chrome (via Chrome Web Store) and Firefox (via Mozilla Add-ons). Works with the current ChatGPT interface as of 2026.
Install Capsula, open any ChatGPT conversation, and click the export button in the toolbar. Choose your format — Markdown preserves code blocks and formatting, HTML gives you a styled page, JSON gives you the raw structured data. The file downloads directly to your computer. No intermediate server, no clipboard copying, no manual formatting.
No. Capsula processes everything locally in the browser tab. It reads the conversation DOM, formats it into your chosen output, and triggers a file download. There are no network requests, no analytics, no telemetry. The extension has no backend server. You can verify this in the source code on GitHub.
