JWT Copy

About

🔐 JWT Copy - The Ultimate JWT Token Detection & Management Tool for Developers

Stop wasting time hunting for JWT tokens! JWT Copy automatically detects, decodes, and lets you copy JSON Web Tokens from any webpage with a single click.

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✨ WHY JWT COPY?

As developers, we constantly work with JWT tokens during:
• API debugging and testing
• Authentication flow development
• Token inspection and validation
• Security auditing
• Quick token copying for Postman, curl, or other tools

JWT Copy eliminates the tedious process of manually searching through DevTools, storage tabs, and network requests. Everything you need is one click away.

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🚀 KEY FEATURES

📦 MULTI-SOURCE TOKEN DETECTION
JWT Copy scans multiple locations to find your tokens:

• LocalStorage - Detects tokens stored in browser's localStorage
• SessionStorage - Finds tokens in sessionStorage
• Network Requests - Intercepts Authorization: Bearer headers in real-time

No matter where your application stores tokens, JWT Copy will find them.

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🔍 INTELLIGENT JWT RECOGNITION

Our smart detection algorithm:
• Identifies standard JWT format (header.payload.signature)
• Parses nested JSON objects to find embedded tokens
• Labels each token with its source for easy identification

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📋 ONE-CLICK COPY

• Copy any detected token instantly to your clipboard
• Visual confirmation when token is copied
• Ready to paste into Postman, curl commands, or your code

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🔓 BUILT-IN JWT DECODER

No need for external websites! Decode tokens right in the extension:
• View the decoded header (algorithm, token type)
• Inspect the payload (claims, expiration, user data)
• Pretty-printed JSON for easy reading
• 100% local - your tokens never leave your browser

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⚡ REAL-TIME NETWORK MONITORING

The background service worker passively monitors network requests:
• Captures Authorization headers automatically
• Works across all websites
• Per-tab token storage
• Automatic cleanup when tabs close

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🎯 PERFECT FOR

👨‍💻 Frontend Developers
Debug authentication issues by quickly inspecting tokens stored in your application.

🔧 Backend Developers  
Grab tokens from the browser to test your APIs directly in Postman or curl.

🔒 Security Professionals
Audit token storage practices and inspect JWT contents during security reviews.

🧪 QA Engineers
Quickly verify token contents and expiration during testing.

📚 Students & Learners
Understand how JWTs work by inspecting real tokens in action.

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🛡️ PRIVACY & SECURITY

Your security is our priority:

✅ 100% Local Processing - All token detection and decoding happens entirely in your browser. No data is ever sent to external servers.

✅ No Analytics - We don't track your usage or collect any data.

✅ Minimal Permissions - We only request permissions necessary for functionality.

✅ Per-Tab Isolation - Tokens are stored per-tab and automatically cleaned up.

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🔐 UNDERSTANDING JWT TOKENS

JSON Web Tokens (JWT) are an industry standard for securely transmitting information between parties. They consist of three parts:

• Header - Contains the token type and signing algorithm
• Payload - Contains the claims (user data, expiration, etc.)
• Signature - Verifies the token hasn't been tampered with

JWT Copy helps you inspect the header and payload, making it easy to:
• Check token expiration times
• Verify user claims and roles
• Debug authentication issues
• Understand token structure

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💡 PRO TIPS

🔹 Refresh the page after installing to ensure the content script is loaded

🔹 Tokens from network requests are captured automatically as you browse

🔹 Use the decode feature to quickly check token expiration

🔹 Tokens are stored per-tab, so each tab has its own token history

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⚙️ PERMISSIONS EXPLAINED

We believe in transparency. Here's why we need each permission:

• activeTab - To scan the current page for tokens
• clipboardWrite - To copy tokens to your clipboard
• webRequest - To intercept Authorization headers

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🆘 SUPPORT

Having issues? Here's how to troubleshoot:

• "No tokens found" - Try refreshing the page and clicking the extension again
• Content script not loaded - Refresh the page after installing the extension
• Missing network tokens - Make sure to interact with the page to trigger API calls

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⚠️ DISCLAIMER

JWT Copy is intended for development and debugging purposes. JWT tokens are sensitive credentials - always handle them with care and never share tokens from production environments publicly.

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Made with ❤️ for developers who work with JWTs daily.

If JWT Copy saves you time, please consider leaving a review! Your feedback helps other developers discover this tool.

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🏷️ Tags: JWT, JSON Web Token, developer tools, bearer token.