Chrome ExtensionWorks where you already work

ThreadHub turns AI chats into a reusable workspace.

Read long conversations, copy clean Markdown, save key replies, annotate ChatGPT threads, and export your AI work without leaving the page.

Add to Chrome - FreeHow it works
Works withChatGPT(most complete)ClaudeGeminiDeepSeek
ThreadHub
Explain how React's useEffect cleanup function works, and show a real example with event listeners.

The cleanup function in useEffect is returned from your effect callback. React calls it before the component unmounts and before each re-render that triggers the effect again.

useEffect(() => {
  const handleKey = (e) => processInput(e.key);
  window.addEventListener('keydown', handleKey);

  // Cleanup: remove listener on unmount
  return () => window.removeEventListener('keydown', handleKey);
}, []);

Without the cleanup, each render adds a new listener: classic memory leak.

Copy MDReaderExportBookmark214 words

Why ThreadHub exists

01

Long AI threads are hard to scan.

A 40-message conversation with code, tables, and formulas becomes an unscrollable wall. Important answers disappear into the noise.

02

Formulas and Markdown often break when copied.

Pasting a code block into Notion or a LaTeX equation into Obsidian turns it into garbled text. Manual cleanup takes longer than the research did.

03

Useful answers get buried.

That detailed system design answer, the working regex, the essay outline: scroll past it once and it is gone. There is no way to star, tag, or search.

04

Sharing or archiving takes too many manual steps.

Screenshot, paste, reformat, rename the file. Getting one clean AI answer into a research note or project folder should not take five minutes.

Four tools. One toolbar.

ThreadHub adds a lightweight layer on top of your existing AI chats. No new interface to learn, no account required.

Read

Distraction-free reading for long AI replies

Open any AI message in Reader Mode: a clean, centered panel that renders code, tables, and LaTeX formulas without forcing you to fight the original chat UI.

  • Code blocks render with language-aware colors and stay easy to copy.
  • LaTeX equations display as readable math with copyable source for notes and papers.
  • Tables scroll horizontally without breaking the surrounding answer.
  • Structured Markdown keeps headings, lists, bold text, and code fences intact.
Reader Mode

useEffect Cleanup - How It Works

The cleanup function is returned from your effect callback. React calls it before the component unmounts and before each re-render that changes the dependency array.

useEffect(() => {
  const handler = (e) => handleInput(e.key);
  window.addEventListener('keydown', handler);
  return () => window.removeEventListener('keydown', handler);
}, []);
LaTeX - click to copy source
\int_0^\infty e^{-x^2}\,dx = \frac{\sqrt{\pi}}{2}

How it fits into your flow

Step 01

Open a supported AI chat page.

Install ThreadHub from the Chrome Web Store. It activates automatically on ChatGPT, Claude, Gemini, and DeepSeek.

Step 02

Use ThreadHub tools inside the conversation.

Hover any AI reply to reveal the toolbar. Open Reader Mode for long answers or use the ChatGPT timeline to navigate and annotate.

Step 03

Save, export, or continue the work.

Bookmark answers to your local library. Export to Markdown, PDF, or PNG. Everything stays on your machine.

What ThreadHub does, and does not do, with your data

ThreadHub reads AI conversation content only when you trigger a specific action. It does not run a background process on every page you visit.

Local-first storage

Bookmarks, notes, annotations, and prompt templates are stored in your browser. They do not leave your device unless you export them.

No background data collection

ThreadHub does not log conversations, send analytics about your AI usage, or track which chats you open.

Content processed on demand

When you click Copy MD or Bookmark, ThreadHub reads the message text to process that request. It does not scan continuously.

No server-side AI processing

ThreadHub is a formatting, export, and organization layer. It does not send your conversations to another AI API.

Permissions explained

Host permissions inject the toolbar and timeline on supported chat pages.

Clipboard write copy Markdown only when you click the copy button.

Storage save bookmarks, annotations, and prompt templates locally.

Tabs open or focus the original chat tab for saved bookmarks.

Frequently asked questions

Which AI platforms are supported?

ChatGPT gets the full feature set: Reader, Capture toolbar, Bookmarks, Question Timeline, Message Folding, Annotations, and Prompt Library. Claude, Gemini, and DeepSeek support the core toolbar and bookmarks library.

Is ThreadHub another AI chatbot or model aggregator?

No. ThreadHub does not provide a new model or proxy your requests. It is a reading, organization, and export layer that runs on top of the AI platforms you already use.

Where is my data stored?

Bookmarks, annotations, and prompt templates are stored in your browser local storage. You can export your library as JSON and import it on another browser.

Can I export to Markdown, PDF, and PNG?

Yes. The export button can save a single reply as Markdown, PDF, or PNG. Markdown preserves code blocks, headings, lists, and tables.

Does every feature work on every AI platform?

No. ChatGPT is the most complete platform. Claude, Gemini, and DeepSeek support the core toolbar; timeline and annotation features depend on each page structure.

Can I disable features I do not use?

Yes. Reader, Toolbar, Bookmarks, Timeline, Message Folding, Annotations, and Prompt Library can be toggled independently in extension settings.

Start using your AI conversations, not just having them.

Free to install. No account required. Your data stays in your browser.

Add to Chrome - FreeSee all features
ThreadHub - AI Chat Workspace | ThreadHub