Making three years of a Telegram group chat queryable

1. source-lm-extension

   1 1 1 6.2 TypeScript

   Bulk sources into NotebookLM, straight from the browser: JSON datasets, YouTube playlists, link lists and web pages. Chrome extension, Manifest V3, no backend.

   

   It ships as source-lm on the Chrome Web Store; the source is on GitHub. The free tier is 5 bulk uploads a calendar month — one chat export is one — and after that it's $29 once. The click-by-click version of this post, with the export dialogs for both clients, is on the site.

2. Kargo

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3. TelegramSwift

   2 31 5,754 9.5 Swift

   Source code of Telegram for macos on Swift 5.0

   

   Export exists in exactly two places. Telegram Desktop has had it since 2018 and offers JSON or HTML. The native Telegram for macOS app — the Mac-only client, not Desktop — added Export Chat History… in 12.10 (24 August 2026) and writes HTML only; the Mac App Store build was still on 12.9, without the menu item, at the end of August. Telegram Web and the phone apps have nothing.

4. tdesktop

   3 177 32,826 10.0 C++

   Telegram Desktop messaging app

   

   Export exists in exactly two places. Telegram Desktop has had it since 2018 and offers JSON or HTML. The native Telegram for macOS app — the Mac-only client, not Desktop — added Export Chat History… in 12.10 (24 August 2026) and writes HTML only; the Mac App Store build was still on 12.9, without the menu item, at the end of August. Telegram Web and the phone apps have nothing.

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