Cairn
One click to export any Claude conversation. Thinking blocks, tool calls, every artefact — on disk, by name, in 200ms.
Notify me on launchWhat gets exported
Your messages. Claude's responses. Thinking blocks. Tool calls and tool results inline. Every artefact pulled out as its own file with the right extension — Python as .py, React as .jsx, Markdown as .md.
Four formats
Raw JSON tree. Readable Markdown transcript. Artefacts-only zip. Or everything bundled. Pick from the side panel.
Secret redaction
Optional toggle scrubs API keys (Anthropic, OpenAI, Google, AWS, GitHub), JWTs, bearer tokens, and private key blocks before the file hits disk.
Why
Claude's built-in export is email-based and dumps everything in one archive. Cairn assumes you finished a real piece of work today and want it on disk now.
No server. No telemetry. No accounts. One authenticated fetch from your browser to claude.ai, parsed locally. The conversation is yours; this extension just makes that real.