HTTP Headers Reference
Common HTTP request and response headers.
Content-Type
Media type of the resource
Authorization
Authentication credentials
Cache-Control
Caching directives
Accept
Media types the client can process
User-Agent
Client software identification
Set-Cookie
Send cookies from server
Cookie
Previously stored cookies
Content-Length
Size of the response body
Host
Target host and port
Referer
URL of the referring page
Origin
Origin of the request
Access-Control-Allow-Origin
CORS allowed origins
X-Content-Type-Options
Prevent MIME sniffing (nosniff)
X-Frame-Options
Clickjacking protection
X-XSS-Protection
XSS filter (legacy)
Strict-Transport-Security
Force HTTPS (HSTS)
Content-Security-Policy
Resource loading policy
ETag
Resource version identifier
Last-Modified
Last modification date
Accept-Encoding
Supported compression algorithms
Transfer-Encoding
Encoding form (chunked, etc.)
Connection
Connection management (keep-alive)
How to Use HTTP Headers
- Enter the domain, IP address, or URL you want to analyze
- Click the lookup or check button
- Review the detailed results and analysis
- Use the information to diagnose or configure your network
Why Use HTTP Headers?
Network diagnostics shouldn't require expensive software or command-line expertise. Our network tools provide DNS lookups, IP geolocation, HTTP header analysis, and connectivity testing directly in your browser. Results are presented in clear, human-readable format with explanations of what each record or header means. These tools are essential for troubleshooting DNS propagation, verifying SSL configurations, checking security headers, and diagnosing connectivity issues. All queries are made in real-time from your browser, giving you accurate results from your actual network location.
- Real-time network information and diagnostics
- Detailed analysis of DNS records, headers, and IP data
- Essential for troubleshooting network issues
- Free alternative to paid network analysis tools
Frequently Asked Questions
Does this check my own IP?
Yes. The tool automatically detects and displays your current IP information.
Is the lookup data accurate?
Results are based on publicly available DNS and IP databases and are generally very accurate.
Can I check any domain?
Yes. Enter any domain name or IP address to get detailed network information.