Export Gemini chat history to JSON with accurate Markdown preservation.
// ==UserScript==
// @name Gemini Chat Dump Archivist
// @name:zh-CN Gemini 聊天记录导出助手 (Chat Dump)
// @namespace https://github.com/miniyu157/gemini-chat-dump-archivist
// @version 2026.3.15
// @description Export Gemini chat history to JSON with accurate Markdown preservation.
// @description:zh-CN 将 Gemini 聊天记录导出为 JSON，并精准保留 Markdown 格式。
// @author Yumeka
// @license MIT
// @match https://gemini.google.com/*
// @icon https://www.gstatic.com/images/branding/product/1x/gemini_48dp.png
// @require https://unpkg.com/turndown/lib/turndown.browser.umd.js
// @grant GM_addStyle
// @run-at document-end
// ==/UserScript==
(() => {
'use strict';
const CONFIG = {
repoUrl: 'https://github.com/miniyu157/gemini-chat-dump-archivist',
licenseUrl: 'https://github.com/miniyu157/gemini-chat-dump-archivist/blob/main/LICENSE',
turndownIgnores: ['button', '.code-block-decoration', 'model-thoughts', 'freemium-rag-disclaimer']
};
const td = new TurndownService({ codeBlockStyle: 'fenced', headingStyle: 'atx' });
td.remove(CONFIG.turndownIgnores);
const Formatters = {
date: () => {
const d = new Date();
const p = n => String(n).padStart(2, '0');
return `${d.getFullYear()}-${p(d.getMonth() + 1)}-${p(d.getDate())}_${p(d.getHours())}_${p(d.getMinutes())}_${p(d.getSeconds())}`;
},
filename: () => {
const el = document.querySelector('[data-test-id="conversation-title"]');
const title = el ? el.textContent.trim().replace(/[\/\\:*?"<>|]/g, '') : 'Gemini_Chat';
return `${title}_${Formatters.date()}.json`;
}
};
const PostProcessor = {
user: (text) => {
const t = text || '';
const idx = t.indexOf('\n\n');
return (idx !== -1 ? t.substring(idx + 2) : t).trim();
}
};
const extractData = () => {
const data = [];
document.querySelectorAll('.conversation-container').forEach(node => {
const user = node.querySelector('user-query .query-text');
const model = node.querySelector('model-response message-content .markdown');
if (user) data.push({ role: 'user', content: PostProcessor.user(user.innerText) });
if (model) data.push({ role: 'model', content: td.turndown(model).trim() });
});
return JSON.stringify(data, null, 2);
};
const ACTIONS = {
downloadJson: () => {
const a = document.createElement('a');
a.href = URL.createObjectURL(new Blob([extractData()], { type: 'application/json' }));
a.download = Formatters.filename();
a.click();
URL.revokeObjectURL(a.href);
},
scrollToAbsoluteTop: async () => {
let lastId = null;
while (true) {
const firstMsg = document.querySelector('.conversation-container');
if (!firstMsg || firstMsg.id === lastId) break;
lastId = firstMsg.id;
firstMsg.scrollIntoView({ block: 'start' });
await new Promise(r => setTimeout(r, 1200));
}
},
openRepo: () => window.open(CONFIG.repoUrl, '_blank'),
openLicense: () => window.open(CONFIG.licenseUrl, '_blank')
};
const MENU_OPTIONS = [
{ label: 'Dump JSON', action: ACTIONS.downloadJson },
{ label: 'Go Top', action: ACTIONS.scrollToAbsoluteTop },
{ label: 'View on GitHub', action: ACTIONS.openRepo },
{ label: 'License', action: ACTIONS.openLicense }
];
const UI = {
menu: null,
init() {
const style = document.createElement('style');
style.textContent = `
[data-test-id="conversation-title"] { cursor: pointer; transition: opacity 0.2s; }
[data-test-id="conversation-title"]:hover { opacity: 0.7; }
.gemini-pro-menu {
position: absolute; display: none; flex-direction: column; z-index: 9999;
background: var(--mdc-theme-surface, #fff); color: var(--mdc-theme-on-surface, #1f1f1f);
border: 1px solid var(--mdc-theme-surface-variant, #e0e0e0);
border-radius: 8px; box-shadow: 0 4px 12px rgba(0,0,0,0.15);
padding: 6px 0; min-width: 160px; margin: 0; list-style: none; font-size: 14px;
}
.gemini-pro-menu li { padding: 10px 16px; cursor: pointer; transition: background 0.15s; }
.gemini-pro-menu li:hover { background: var(--mdc-theme-surface-variant, #f0f0f0); }
@media (prefers-color-scheme: dark) {
.gemini-pro-menu { background: #1e1e1e; border-color: #333; color: #e3e3e3; }
.gemini-pro-menu li:hover { background: #2c2c2c; }
}
`;
document.head.appendChild(style);
this.menu = document.createElement('menu');
this.menu.className = 'gemini-pro-menu';
MENU_OPTIONS.forEach(({ label, action }) => {
const li = document.createElement('li');
li.innerText = label;
li.onclick = (e) => {
e.stopPropagation();
this.hide();
action();
};
this.menu.appendChild(li);
});
document.body.appendChild(this.menu);
document.addEventListener('click', () => this.hide());
},
show(target) {
const rect = target.getBoundingClientRect();
this.menu.style.display = 'flex';
this.menu.style.top = `${rect.bottom + window.scrollY + 8}px`;
this.menu.style.left = `${rect.left + window.scrollX}px`;
},
hide() {
if (this.menu) this.menu.style.display = 'none';
}
};
UI.init();
document.addEventListener('click', (e) => {
const titleBtn = e.target.closest('[data-test-id="conversation-title"]');
if (titleBtn) {
e.preventDefault();
e.stopPropagation();
UI.show(titleBtn);
}
}, true);
})();