Claude Conversation Download

download.js

(async () => {
  const saveData = (() => {
    const a = document.createElement('a');
    document.body.appendChild(a);
    a.style = 'display: none';
    return (data, fileName) => {
      const json = JSON.stringify(data),
        blob = new Blob([data], { type: 'text/markdown' }),
        url = window.URL.createObjectURL(blob);
      a.href = url;
      a.download = fileName;
      a.click();
      window.URL.revokeObjectURL(url);
    };
  })();

  const getCookie = (name) => {
    const value = `; ${document.cookie}`;
    const parts = value.split(`; ${name}=`);
    if (parts.length === 2) return parts.pop().split(';').shift();
  };

  const getSupportedTypes = (type) => {
    const types = {
      text: ({ text }) => text,
      thinking: ({ thinking }) =>
        `
<think>
${thinking}
</think>
`,
      tool_use: ({ input: { content, language = '' } }) =>
        content !== undefined
          ? `
\`\`\`${language}
${content}
\`\`\`
`
          : '',
      tool_result: ({ name, content: [{ type: toolResultType, ...rest }] }) => `
<${name}>
${getSupportedTypes(toolResultType)(rest)}
</${name}>
`,
      default: () => '',
    };
    return types[type] ?? types['default'];
  };

  const pieces = window.location.pathname.split('/');
  const orgId = getCookie('lastActiveOrg');
  const chatId = pieces[pieces.length - 1];

  const { chat_messages: messages, name: title } = await fetch(
    `https://claude.ai/api/organizations/${orgId}/chat_conversations/${chatId}?tree=True&rendering_mode=messages&render_all_tools=true`,
  ).then((r) => r.json());

  saveData(
    messages.reduce(
      (acc, { sender, content }) =>
        (acc += `
**${sender.toUpperCase()}**

${content
  .map(({ type, ...item }) => getSupportedTypes(type)(item))
  .filter(Boolean)
  .join('\n')}
`),
      `# ${title}\n`,
    ),
    `${chatId}.md`,
  );
})();