Network & Web Utilities
HTTP codes, URL inspection, subnet calculators, and client diagnostics. Every utility runs 100% inside your browser sandbox with zero network latency, zero tracking cookies, and absolute data privacy.
HTTP Status Code Reference
Fast lookup, RFC specifications, and troubleshooting guide for all HTTP 1xx, 2xx, 3xx, 4xx, and 5xx response status codes.
User-Agent Parser & Device Inspector
Inspect your active browser client header or parse any User-Agent string to detect OS, browser, and engine.
User-Agent Generator & Scraper Rotator
Generate realistic modern User-Agent strings, random scraper rotation pools, and matching Client Hints for Python, Playwright, and cURL.
cURL to Code Converter
Convert cURL commands to Python, JavaScript Fetch, Axios, Go, PHP, and Node.js or visually build API requests.
HTTP Header Parser & Security Auditor
Parse raw HTTP request and response headers, decode directives, and audit security configurations like HSTS and CSP.
MIME Type & Content-Type Lookup
Instant bidirectional search for standard IANA MIME types, file extensions, and server Content-Type configurations.
Random IP, MAC & Port Generator
Generate valid IPv4 and IPv6 addresses across public and private CIDR subnets, random MAC addresses with vendor OUIs, and RFC port numbers.
Meta Tag & Social Preview Generator
Generate complete HTML meta tags, Open Graph (OG), and Twitter Cards with real-time Google SERP, Facebook, Twitter/X, Discord, and LinkedIn previews. Consolidates SEO metadata, Open Graph, and Twitter Cards into a unified generator.
Robots.txt Generator & Directives Builder
Build RFC 9309 compliant robots.txt files, configure crawler directives, block AI scrapers, specify sitemaps, and test URL path access in real time.
Content Security Policy (CSP) Generator
Build, audit, and preview secure Content Security Policy headers, HTML meta tags, and server configurations (Nginx, Apache, Vercel, Express) with 1-click presets.
CORS Header & Preflight Generator
Configure and generate valid Cross-Origin Resource Sharing (CORS) headers and preflight snippets for Express, Nginx, Apache, FastAPI, Cloudflare, and Next.js.
Cache-Control & HTTP Caching Header Generator
Build RFC 9111 compliant Cache-Control headers with visual directives for browsers and CDNs, stale-while-revalidate, and Nginx, Apache, Vercel, and Cloudflare snippets.
HTTP Methods & REST Semantics Reference
Interactive RFC 9110 specification guide for HTTP request methods (GET, POST, PUT, PATCH, DELETE), safety, idempotency, caching rules, and PUT vs PATCH comparisons.
Campaign UTM Builder & Link Inspector
Build Google Analytics (GA4) campaign tracking URLs with platform presets for Google Ads, Meta, Email, and LinkedIn. Inspect and parse existing UTM links with instant QR code export.
URL & Query String Parser & Builder
Deconstruct URLs into protocol, host, port, path segments, and query parameters. Interactively edit, toggle, add, or delete query parameters with live URL rebuilding and JSON/.ENV export.
URL Cleaner & Tracking Parameter Stripper
Strip tracking parameters (fbclid, gclid, utm_*, si=, mc_eid) and canonicalize URLs. Sanitize privacy-invading query strings with single or bulk batch list cleaning.
IPv4 Subnet & CIDR Calculator
Calculate IPv4 network address, broadcast, usable host range, CIDR prefixes (/0 to /32), wildcard masks, and binary octets. Features interactive CIDR slider, VLSM subnet subdivider, and reference cheat sheet.
Common Port Numbers & Services Reference
Searchable cheat sheet and reference for IANA well-known ports (0–1023), registered ports, and modern developer/cloud services (Postgres, Redis, Docker, K8s). Features protocol filtering, security risk audit, and CSV export.
IPv6 Subnet Calculator & Address Expander
Calculate IPv6 network prefix, host capacity (2^(128-n)), and /64 subnet allocations. Features RFC 5952 canonical address compression, 32-hextet expansion, reverse DNS pointer (ip6.arpa), and site delegation tables.
IP & Binary Format Converter
Convert IP addresses bidirectionally between dotted decimal, 32-bit binary octets, hexadecimal, decimal integer (INET_ATON), octal, and IPv4-mapped IPv6. Features live format auto-detection, RFC scope validation, and batch multi-line conversion.
DNS Record Builder & Reference
Interactive visual builder and RFC specification reference for 15+ DNS record types (A, AAAA, CNAME, MX, TXT, SPF, DKIM, DMARC, SRV, CAA, NS, SOA, TLSA). Generates BIND zone syntax, Cloudflare/registrar format tables, and live dig/nslookup verification commands.
Hosts File Generator & Formatter
Visual builder, formatter, and deduplicator for /etc/hosts files. Includes default clean templates for Windows 11/10, macOS, and Linux, local web development stacks, adblock sinkholes, and DNS cache flush commands.
DNS Zone Validator & Formatter
RFC 1035 BIND DNS zone file validator and beautifier. Lints zone files for missing SOA, CNAME collisions, missing FQDN trailing dots, and invalid IPs. Beautifies records into aligned columns grouped by record type.
Screen Resolution & Viewport Size Tester
Instant zero-click detector for screen resolution, browser viewport size, and device pixel ratio (DPR). Features a live CSS breakpoint ruler (Tailwind / Bootstrap), interactive display scale preview, color depth, and tailored CSS media queries.
What Is My Browser & Client Info
Instant automatic browser detection. Identifies your exact browser version, rendering engine (Blink, Gecko, WebKit), OS platform, and User-Agent Client Hints (Sec-CH-UA). Includes step-by-step update instructions and a one-click IT support diagnostic report.
Browser Feature & Web API Detector
Audit live browser compatibility for 45+ modern Web APIs and HTML5 standards: WebGPU, WebGL 2, WebRTC, Service Workers, WebAuthn Passkeys, Web Audio, File System Access, and WebAssembly SIMD. Includes interactive feature test triggers and code snippets.
Time Zone & UTC Offset Detector
Instant zero-click detector for your browser IANA time zone, current local time with live seconds, UTC/GMT offset, Daylight Saving Time (DST) status, and Unix timestamp. Features a global world clock comparison matrix and interactive timezone difference calculator.
MAC Address Lookup & OUI Vendor Detector
Instant IEEE OUI MAC address lookup and hardware manufacturer detector. Identify device vendors (Apple, Cisco, Intel, Raspberry Pi, ESP32), analyze Unicast/Multicast and Private/Randomized MAC bits, convert between Colon, Dash, and Cisco formats, and process bulk MAC logs.
Schema.org JSON-LD Generator & Validator
Generate Google-compliant Schema.org JSON-LD structured data for Articles, FAQPages, Local Businesses, Products, Organizations, Breadcrumbs, How-To guides, and Events with live validation and rich result previews.
XML Sitemap Generator & Validator
Convert bulk URL lists into standard Sitemaps.org XML with customizable changefreq, priority, and lastmod directives. Inspect and validate existing XML sitemaps, detect duplicate URLs, and export clean URL inventories.
URL Encoder & Decoder
Encode and decode URLs, query strings, and URI components with RFC 3986 and form-urlencoded standards, interactive query parameter inspector, and batch processing.
Punycode & IDN Domain Converter
Convert Internationalized Domain Names (IDNs) to and from Punycode (xn--) with RFC 3492 compliance, DNS label length audit, and homoglyph spoof detection.
Credit Card Number Validator & Luhn Checker
Validate credit card numbers across major card networks (Visa, Mastercard, Amex, Discover, JCB, Diners). Verify ISO/IEC 7812 compliance, Luhn Mod 10 checksum, BIN ranges, and card formats with 100% offline client-side calculation.
IBAN Validator & Structure Inspector
Validate International Bank Account Numbers (IBAN) across 80+ countries. Verify ISO 13616 specifications, ISO 7064 MOD-97-10 check digits, SEPA eligibility, and national BBAN account structures with 100% offline client-side calculation.
Email Syntax & Format Validator
Validate email address syntax against RFC 5321 and RFC 5322 standards. Detect common domain typos (e.g., gmial.com), identify disposable and temporary email providers, inspect local-part and domain components, and generate production-ready validation regex.