Capsula
Capsula is a free, open-source browser extension for exporting ChatGPT conversations. It saves a single conversation as a Markdown, HTML, or JSON file, and the page describes it as a way to export and organize ChatGPT conversations with one click.
The extension runs entirely in the browser. It reads the conversation from the current tab’s DOM, converts it to the chosen format, and downloads the file locally, with no data sent to a server. The same description says there are no accounts, no tracking, no analytics, no telemetry, and no backend server, and that the extension does not request network permissions. Its output preserves code blocks and structure, and the Markdown export keeps headers and bold text. The page also notes that the resulting .md file opens correctly in Obsidian, Notion, Typora, VS Code, and GitHub.
Capsula is available for Chrome and Firefox, via the Chrome Web Store and Mozilla Add-ons. The page says it works with the current ChatGPT interface as of 2026. It is presented as free and open source, with source code available to review.
Overview
6 featuresCapsula is a Browser DevTools & extensions project. It enables users to export and save ChatGPT conversations in multiple formats locally. It is built as an open-source project for developers and ChatGPT users. The project is open source (Open Source). Capsula is available on the web and embeddable surfaces.
Seveneves builds and maintains Capsula, and it first shipped in 2025. Key capabilities include export to Markdown, export to HTML, and export to JSON.
- Export to Markdown
- Export to HTML
- Export to JSON
- One-click export
- Local processing
- No account required
Built with & integrations
Trust & compliance
Indexing history
1What PulseGate has recorded for this listing
Frequently asked questions about Capsula
- What does Capsula do?
- Capsula enables users to export and save ChatGPT conversations in multiple formats locally. It is catalogued under Browser DevTools & extensions on PulseGate.
- Who is Capsula for?
- Capsula is an open-source project built for developers and ChatGPT users.
- Is Capsula free?
- Yes — Capsula is open source under the Open Source license and free to use.
- What platforms does Capsula run on?
- Capsula runs on the web and embeddable surfaces.
- Is Capsula still maintained?
- Unverified. Capsula has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
- Who develops Capsula?
- Capsula is developed by Seveneves.
- When did Capsula launch?
- Capsula first shipped in 2025.
- Is Capsula open source?
- Yes — Capsula is open source under the Open Source license, developed on GitHub.
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