Analyze email headers directly in your browser — privately, securely, and for free.
The Email Header Analyzer helps you understand where an email came from and how it traveled across the internet. Analyze raw email headers, visualize the mail server path, and inspect technical details — without sending your email data to a server.
👉 Try the Email Header Analyzer
Your email headers can contain sensitive information. That's why the Email Header Analyzer is designed to process everything locally in your browser.
- 🔐 100% client-side processing
- 🚫 No email headers are uploaded
- 🌐 No server-side analysis
- 🛡️ Your data stays in your browser
You can analyze sensitive email headers without handing them over to a third-party service.
Visualize the path an email took through the different mail servers.
Identify:
- Mail servers involved in delivery
- The route your email took
- Delays between mail servers
- Origin and destination information
Inspect the technical information contained in email headers and better understand how an email was processed and delivered.
All analysis is performed locally in your browser. The email header content itself does not need to leave your device.
The Email Header Analyzer is fully open source.
You can inspect the source code, report issues, suggest improvements, and contribute to the project.
No installation or account is required.
👉 Open the Email Header Analyzer
Contributions are welcome!
If you have an idea, find a bug, or want to improve the project:
- Open an issue to report a problem or suggest an improvement
- Submit a pull request with your changes
- Help improve the documentation
Please make sure your changes are focused and include appropriate tests where applicable.
This project is licensed under the MIT License.
See the LICENSE file for the complete license text.
Have a question, found a problem, or have feedback?
Please open an issue on GitHub.
Email Header Analyzer — Understand your email. Keep your data private.