Network Tools
HTTP references, cURL converters, WebSocket testing, and network utilities.
cURL to Fetch Converter
Convert curl commands to JavaScript fetch or axios.
Port Numbers Reference
Look up well-known TCP/UDP port numbers with service names and descriptions.
WebSocket Tester
Connect to any WebSocket server, send messages, and view real-time responses.
Network Speed Estimator
Estimate your network latency and download speed using browser fetch timing.
HTTP Methods Reference
Comprehensive HTTP methods reference guide.
Query String Builder
Visually build and parse URL query strings β add, edit, and remove parameters with ease.
User Agent Parser
Parse any User-Agent string to extract browser, OS, device type, and engine details.
IP Address Converter
Convert between IPv4, IPv6, decimal, binary, and hex formats. Shows address class and type.
Bandwidth Calculator
Calculate file transfer time given bandwidth, or required speed given file size and time.
HTTP Cookie Parser
Parse Set-Cookie headers and cookie strings into structured key-value pairs with attribute details.
HTTP Request Builder
Build HTTP requests with custom headers and body, then export as curl or fetch code.
DNS Record Types Reference
Comprehensive reference for DNS record types.
HTTP Cache Header Generator
Visually build Cache-Control headers with directives explained.
CIDR Subnet Calculator
Calculate network address, broadcast, host range, and subnet mask from CIDR notation.
HTTP Headers Reference
Searchable reference table of HTTP request and response headers.
Fetch to cURL Converter
Convert JavaScript fetch() calls to equivalent cURL commands.
MIME Type Reference
Searchable reference of 200+ MIME types by file extension or content type.
Email Address Validator
Validate single or multiple email addresses for format compliance.
DNS Record Generator
Generate DNS zone file entries for A, MX, TXT, CNAME, and SRV record types.
IPv6 Expander / Compressor
Expand compressed IPv6 addresses to full notation or compress them.
URL Diff Checker
Compare two URLs and highlight differences in each component.
UTM Builder
Build UTM-tagged URLs for Google Analytics campaign tracking with one click.
Sitemap Validator
Validate XML sitemap format, check URLs, and detect common sitemap errors.
OSI Model Reference
Interactive OSI model 7-layer reference with protocols, functions, and examples.
MAC Address Generator
Generate random MAC addresses with vendor OUI prefix, format, and quantity options.
SFTP Commands Reference
Complete SFTP commands cheat sheet for file transfer over SSH.
Traceroute Reference
Complete traceroute command reference for Linux, macOS, and Windows.
Bandwidth Delay Product Calculator
Calculate BDP for TCP buffer tuning and get recommended window sizes and sysctl settings.
SMTP Commands Reference
Complete reference for SMTP commands, response codes, and email protocol flow with interactive examples.
TCP Flags Reference
TCP flags and connection states reference guide.
VPN Protocols Reference
Compare VPN protocols: WireGuard, OpenVPN, IKEv2, L2TP, PPTP, and SSTP.
Wireless Standards Reference
Compare Wi-Fi 802.11 standards from b/g/n to Wi-Fi 6E and Wi-Fi 7 specifications.
Netstat Commands Reference
Complete netstat and ss command reference for Linux, macOS, and Windows with searchable examples.
HTTP Methods Reference
Comprehensive HTTP methods reference guide.
cURL Command Builder
Build curl commands with URL, headers, and body options.
HTTP Security Headers Reference
HTTP security headers reference and checker β CSP, HSTS, X-Frame-Options, CORS, and more.
TCP vs UDP Reference
TCP and UDP protocol comparison reference with key differences and use cases.