About Headers Live

What is Headers Live?

Headers Live is a comprehensive web analysis tool designed to help developers, security professionals, and website owners understand and analyze HTTP headers, TLS certificates, DNS records, and more.

It was born out of a need to see this kind of information, but I would not often be able to be near a computer terminal to be able to use commands such as curl or whois.

So I decided to create a website that would allow me to see this information from anywhere, without having to resort to computer commands and with ease.

Why We Created This Tool

Understanding HTTP headers is crucial for:

• Security: Analyzing security headers like Content-Security-Policy, X-Frame-Options, and HSTS
• Performance: Examining caching headers and compression settings
• Debugging: Troubleshooting website issues and configuration problems
• Compliance: Ensuring your website meets security and performance standards

Features

The site is packed with several features with easy-to-read information.

HTTP Headers Analysis

• Complete header analysis with categorization
• Security header validation
• Performance optimization insights
• Response time measurements

TLS Certificate Information

• Certificate chain analysis
• Expiration date monitoring
• Security protocol verification
• Cipher suite details

WHOIS Lookup

• Domain registration information
• Name server details
• Registrar information
• Historical data when available

IP Address Lookup

• Geographic location data
• ISP and hosting provider information
• Network details
• Reverse DNS lookup

Common Issues and Solutions

Why Your Website Headers Might Not Show

There are several reasons why Headers Live might not be able to analyze your website:

1. Firewall or CDN Blocking: Your website might be blocking our requests
2. Bot Detection: Some websites block automated requests - Cloudflare is known to do so!
3. Geographic Restrictions: Your website might not be accessible from our servers
4. Rate Limiting: Your server might be rate-limiting requests
5. SSL/TLS Issues: Certificate problems can prevent analysis
6. Network Connectivity: Temporary network issues

Troubleshooting Tips

• Check if your website is accessible: Try accessing your website from different locations
• Verify SSL certificate: Make sure your SSL certificate is valid and properly configured
• Review security settings: Check if you're blocking legitimate analysis tools
• Test with different URLs: Try both www and non-www versions of your domain

Privacy and Data

We respect your privacy:

• We don't store the content of analyzed websites
• Analysis results are temporary and not permanently stored
• We don't track or profile users
• All connections use secure protocols