seveneves.ai
Available for Chrome & Firefox

Export your ChatGPT conversations

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.

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One-click export

Save any conversation instantly in your preferred format

100% private

Everything happens locally. No data ever leaves your browser

Clean output

Perfectly formatted exports that preserve code blocks and structure

Your conversations stay yours

Capsula is designed with privacy at its core. No compromises.

No tracking

Zero analytics or telemetry

Local only

Runs entirely in your browser

No accounts

Nothing to sign up for

What is Capsula?

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.

How do I export a ChatGPT conversation to Markdown?

  1. Install Capsula from the Chrome Web Store or Firefox Add-ons — no account needed.
  2. Open chatgpt.com and navigate to the conversation you want to save.
  3. Click the Capsula icon in your browser toolbar. A small panel appears.
  4. Choose your format: Markdown (great for notes apps, Obsidian, GitHub), HTML (styled, readable in any browser), or JSON (raw structure for scripting or archiving).
  5. Click Export. The file downloads instantly — no server round-trip, no clipboard paste.

Code blocks, headers, and bold text are preserved faithfully in the Markdown output. The resulting .md file opens correctly in Obsidian, Notion, Typora, VS Code, and GitHub.

Is Capsula private — does it send my data anywhere?

No. Capsula reads the conversation from the current browser tab's DOM, converts it to your chosen format, and triggers a local file download. There are no network requests, no analytics, no telemetry, and no backend server — the extension does not even request network permissions. You can verify this by reading the source code on GitHub.

Capsula vs ChatGPT's built-in export

ChatGPT has a built-in export in Settings → Data controls → Export data. It emails you a ZIP of your entire account — all conversations, as HTML and JSON — which can take minutes to arrive. Capsula is different: it exports the single conversation you have open, right now, in the format you choose, in one click.

Dimension Capsula ChatGPT built-in export
Scope ✓ Single conversation Entire account (all chats)
Markdown output ✓ Yes ✗ HTML and JSON only
One-click ✓ Instant download Request → wait → email → unzip
Where data goes ✓ Local only, never leaves browser Processed by OpenAI, emailed as ZIP
Formats Markdown, HTML, JSON HTML, JSON
Account required ✓ No (extension only) Yes (your ChatGPT account)
Works on any conversation ✓ Yes, while it's open Yes (included in full export)

Use Capsula when you want to save or share a specific conversation now, in Markdown, without waiting for an email. Use ChatGPT's built-in export when you want a full account backup of all your conversations at once.