Networking Tools
Browse every networking tool on the site. Each one runs entirely in your browser and is free to use.
Bandwidth Calculator
Convert between bandwidth units and calculate file transfer times.
CIDR to IP Range
Convert CIDR notation to full IP address range with host enumeration.
CORS Header Builder
Build and validate CORS (Cross-Origin Resource Sharing) HTTP headers.
CSP Header Builder
Build Content-Security-Policy headers with an interactive directive editor.
DNS Propagation Checker
Check DNS propagation status across multiple global DNS servers.
DNS Record Viewer
Look up DNS records (A, AAAA, MX, CNAME, TXT, NS) for any domain.
Email Header Analyzer
Parse and trace email headers to identify the delivery path and potential issues.
HTTP Header Analyzer
Parse and analyze HTTP headers with explanations for each header field.
HTTP Status Code Reference
Browse and search all HTTP status codes with descriptions and usage examples.
Internet Speed Test Info
Understand your internet speed metrics with bandwidth explanations and comparisons.
IP Address Lookup
Look up your public IP address with geolocation and network details.
IP Range Calculator
Convert between IP ranges and CIDR notation, calculate host counts.
IPv6 Expander / Compressor
Expand compressed IPv6 addresses and compress expanded ones.
JSON Web Token Builder
Build, encode, and decode JSON Web Tokens (JWT) with custom claims.
Latency Calculator
Estimate network latency impact on throughput and calculate round-trip times.
MAC Address Lookup
Look up the manufacturer/vendor of a network device from its MAC address.
Network Port Reference
Browse and search common network ports with service names and descriptions.
SSL Certificate Checker
Check SSL/TLS certificate details, expiration date, and security status.
Subnet Calculator
Calculate subnet details from IP address and CIDR notation or subnet mask.
URL Parser
Break down URLs into their components: protocol, host, path, query parameters, and fragment.
User Agent Parser
Parse User-Agent strings to identify browser, OS, device type, and engine.
WHOIS Lookup
Look up domain registration details including registrar, dates, and nameservers.
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