Tools

Convert between bandwidth units and calculate file transfer times.

Convert CIDR notation to full IP address range with host enumeration.

Build and validate CORS (Cross-Origin Resource Sharing) HTTP headers.

Build Content-Security-Policy headers with an interactive directive editor.

Check DNS propagation status across multiple global DNS servers.

Look up DNS records (A, AAAA, MX, CNAME, TXT, NS) for any domain.

Parse and trace email headers to identify the delivery path and potential issues.

Parse and analyze HTTP headers with explanations for each header field.

Browse and search all HTTP status codes with descriptions and usage examples.

Understand your internet speed metrics with bandwidth explanations and comparisons.

Look up your public IP address with geolocation and network details.

Convert between IP ranges and CIDR notation, calculate host counts.

Expand compressed IPv6 addresses and compress expanded ones.

Build, encode, and decode JSON Web Tokens (JWT) with custom claims.

Estimate network latency impact on throughput and calculate round-trip times.

Look up the manufacturer/vendor of a network device from its MAC address.

Browse and search common network ports with service names and descriptions.

Check SSL/TLS certificate details, expiration date, and security status.

Calculate subnet details from IP address and CIDR notation or subnet mask.

Break down URLs into their components: protocol, host, path, query parameters, and fragment.

Parse User-Agent strings to identify browser, OS, device type, and engine.

Look up domain registration details including registrar, dates, and nameservers.