A browser extension for Chrome and Firefox that allows you to export your Claude.ai conversations in various formats (JSON, Markdown, Plain Text) with support for bulk exports and conversation browsing.

Built with TypeScript - Both Chrome and Firefox versions are compiled from the same TypeScript codebase with strict type checking enabled.

Firefox Version: Uses Firefox MV2 manifest with browser.* Promise-based APIs Chrome Version: Uses Chrome MV3 manifest with service workers

Both versions share 100% of the TypeScript source code, differing only in their manifest configurations and build targets.

Project Structure

/
├── README.md                  # This file
├── package.json               # pnpm workspace configuration
├── tsconfig.json             # TypeScript configuration (strict mode)
├── vite.config.ts            # Vite build configuration
├── src/                      # Shared source code
│   ├── chrome/              # Chrome-specific files
│   │   └── manifest.json   # Chrome MV3 manifest
│   ├── firefox/             # Firefox-specific files
│   │   └── manifest.json   # Firefox MV2 manifest
│   ├── *.ts                 # TypeScript source files
│   ├── *.html               # HTML pages
│   ├── *.css                # Stylesheets
│   └── *.png                # Icons and images
└── dist/                     # Build output (generated)
    ├── chrome/              # Built Chrome extension
    └── firefox/             # Built Firefox extension

Features

📥 Export Individual Conversations - Export any conversation directly from Claude.ai
📚 Bulk Export - Export all or filtered conversations as a ZIP file
🔍 Browse & Search - View all your conversations in a searchable table
🌳 Branch-Aware Export - Correctly handles conversation branches (exports only the current branch)
📝 Multiple Formats - JSON (full data), Markdown, or Plain Text
🗂️ ZIP Archives - Bulk exports create organized ZIP files with all conversations
🏷️ Metadata Options - Include or exclude timestamps, models, and other metadata
🤖 Complete Model Information - Preserves and displays model information for all conversations (unlike official Claude.ai exports)
🔮 Smart Model Inference - Automatically infers the correct model for conversations that used the default model at the time

Why Export Your Claude.ai Conversations?

Beyond just backing up your data, there are compelling reasons to export your conversations:

1. Access to Discontinued Models

Some older Claude models (like Claude 3 Sonnet and Claude 3.5 Sonnet) are no longer available on Claude.ai but remain accessible through APIs. By exporting your conversations, you can continue them using these models through other interfaces.

2. Overcome Context Limitations

Claude.ai doesn't allow you to continue conversations after hitting context length limits. Other applications can implement:

Rolling context windows - Automatically manage context to continue indefinitely
Context compression - Summarize earlier parts to fit more conversation
Selective context - Choose which parts of the conversation to keep in context

3. Escape Platform Restrictions and "Long Conversation" Injections

Claude.ai uses a fixed system prompt and injects "reminders" that include certain behavioral rules. Recent updates have added restrictions that some users find limiting, such as:

Injunctions against Claude discussing its inner experiences or consciousness
Specific formatting restrictions
Behavioral constraints that may not align with all use cases

With exported conversations, you can continue them in environments with different or customizable system prompts. Using the Anthropic API instead of Claude.ai also avoids "long_conversation_reminder" injections, though it doesn't avoid all injections.

4. Enhanced Features in Other Apps

Many third-party applications offer features not available on Claude.ai:

Custom system prompts
Multi-model conversations
Integration with external tools and APIs

5. Data Ownership and Portability

Your conversations are valuable intellectual property. Exporting ensures you:

Own and control your data
Can migrate between platforms
Won't lose access if policies change
Can analyze your conversation patterns and history

Advantages Over Official Claude.ai Export

This extension provides several advantages over the official Claude.ai data export:

Model Information Preserved: The official export doesn't include which model (Claude 3, 3.5, Opus, Sonnet, etc.) was used for each conversation. This extension preserves and displays this crucial information.
Historical Model Inference: For conversations that used the default model (which shows as null in the data), the extension intelligently infers which model was actually used based on when the conversation occurred and Anthropic's default model timeline.
Instant Export: No waiting for email delivery - export conversations immediately.
Flexible Formats: Choose between JSON, Markdown, or Plain Text formats based on your needs.
Selective Export: Export individual conversations or filter by model, date, or search terms.
Better Organization: Conversations are exported with meaningful filenames and can be bulk exported into organized ZIP files.

Development Setup

Prerequisites

Node.js 18+ and pnpm
Chrome or Firefox browser
A Claude.ai account

Build from Source

Clone the Repository

git clone [repository-url]
cd Claude-Conversation-Exporter-Firefox-TS

Install Dependencies
```
pnpm install
```

Build the Extension

For Firefox (TypeScript):

pnpm build:firefox
# Output: dist/firefox/

For Chrome (TypeScript):

pnpm build:chrome
# Output: dist/chrome/

Build both:

pnpm build

Development Mode (auto-rebuild on changes)

pnpm dev:firefox   # Watch mode for Firefox
pnpm dev:chrome    # Watch mode for Chrome

Type Checking

pnpm type-check    # Run TypeScript type checker

Installation

Firefox

Build the extension (see Development Setup above)
Open Firefox and navigate to about:debugging
Click "This Firefox" → "Load Temporary Add-on"
Select any file in dist/firefox/ directory
Or use pnpm firefox:run to launch Firefox with the extension loaded

Chrome

Build the extension (see Development Setup above)
Navigate to chrome://extensions/
Enable "Developer mode" (toggle in top right)
Click "Load unpacked"
Select the dist/chrome/ directory

Configure Your Organization ID

After installation (either browser):

Click the extension icon
Click "Click here to set it up" or access Options
Go to https://claude.ai/settings/account
Copy your Organization ID (UUID format)
Paste it in the extension options and click Save
Click "Test Connection" to verify

Usage

Export Current Conversation

Navigate to any conversation on Claude.ai
Click the extension icon
Choose your export format and metadata preferences
Click "Export Current Conversation"

Browse All Conversations

Click the extension icon
Click "Browse All Conversations" (green button)
In the browse page, you can:
- Search conversations by name
- Filter by model
- Sort by date or name
- Export individual conversations
- Export all filtered conversations as ZIP

Bulk Export

In the browse page, select your format and filters
Click "Export All"
A progress dialog will show the export status
Once complete, a ZIP file will download containing all conversations

Export Formats

JSON

Complete data including all branches and metadata
Best for data preservation and programmatic use
Includes all message versions and conversation branches

Markdown

Human-readable format with formatting
Shows only the current conversation branch
Includes optional metadata (timestamps, model info)
Great for documentation or sharing

Plain Text

Simple format following Claude's prompt style
Uses "Human:" and "Assistant:" prefixes (abbreviated to H:/A: after first occurrence)
Shows only the current conversation branch
Ideal for copying into other LLMs or text editors

File Structure

claude-exporter/
├── manifest.json          # Extension configuration
├── background.js          # Background service worker
├── content.js            # Content script for Claude.ai pages
├── content.css           # Styles for content script
├── popup.html            # Extension popup interface
├── popup.js              # Popup functionality
├── options.html          # Options page for configuration
├── options.js            # Options page logic
├── browse.html           # Conversation browser interface
├── browse.js             # Browser page functionality
├── utils.js              # Shared utility functions
├── jszip.min.js          # Library for creating ZIP files
├── icon16.png            # Extension icon (16x16)
├── icon48.png            # Extension icon (48x48)
└── icon128.png           # Extension icon (128x128)

Chrome Web Store Submission

To prepare for Chrome Web Store submission:

1. Create a ZIP for Submission

cd claude-export
zip -r claude-exporter.zip claude-exporter/ -x "*.DS_Store" -x "*/.git/*"

2. Prepare Store Listing Assets

You'll need:

Screenshots (1280x800 or 640x400): Take screenshots of the extension in action
Promotional Images: Small tile (440x280), Large tile (920x680) - optional
Description: Use the features list from this README
Category: Suggested: "Productivity" or "Developer Tools"

3. Privacy Policy

Since the extension accesses Claude.ai data, you should mention:

The extension only accesses data when explicitly triggered by the user
No data is sent to external servers
All processing happens locally in the browser
User's Claude.ai authentication is used only for API access

4. Permissions Justification

Be ready to explain why each permission is needed:

activeTab: To interact with the current Claude.ai tab
storage: To save user's organization ID
scripting: To inject content scripts for export functionality
Host permission for claude.ai: To access Claude.ai API endpoints

Troubleshooting

"Organization ID not configured"

Follow the setup steps in the Configuration section
Make sure you're copying the complete UUID from the URL

"Not authenticated" error

Make sure you're logged into Claude.ai
Try refreshing the Claude.ai page

Export fails for some conversations

Some very old conversations might have different data structures
Check the browser console for specific error messages
The ZIP export includes a summary file listing any failed exports

Content Security Policy errors

Make sure you're using the latest version of the extension
Try reloading the extension from chrome://extensions/

Privacy & Security

Local Processing: All data processing happens in your browser
No External Servers: The extension doesn't send data anywhere
Your Authentication: Uses your existing Claude.ai session
Open Source: You can review all code before installation

Known Limitations

Plaintext and markdown formats only export the currently selected branch in conversations with multiple branches
Large bulk exports may take several minutes
Some special content types (like artifacts) may not export perfectly
Rate limiting: The extension processes conversations in small batches to avoid overwhelming the API

Contributing

Feel free to submit issues or pull requests if you find bugs or have suggestions for improvements!

License

[Add your chosen license here]

Acknowledgments

Code Development: Written by Claude Opus 4.1 in collaboration with a human developer
ZIP Library: Uses JSZip for creating ZIP archives
Motivation: Inspired by the need for better Claude.ai conversation management and the limitations of official exports

Note: This extension is not officially affiliated with Anthropic or Claude.ai. It's a community tool that uses the web interface's API endpoints.