Website & Domain Tools
Inspect domain age, query RDAP & DNS records, check website status and HTTP headers.
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DNS Lookup
Query authoritative DNS records: A, AAAA, CNAME, MX, TXT, NS, and SOA with TTL values.
Website & Domain Tools · All tools (4)
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Domain Age Checker
Lookup the original creation date, tenure, registry age, and updated timestamps for any domain.
RDAP Lookup
Modern successor to WHOIS providing structured JSON-based registry data, entities, and status codes.
Website Status Checker
Determine if a web resource is down for everyone or just you, checking HTTP response codes.
HTTP Headers Checker
Inspect server responses, redirection chains (301/302), CSP, HSTS, and CORS security headers.
Guides & Reference · Website & Domain Tools
PNG vs WebP: Comparing Modern Compression Ratios & Visual Fidelity
Understanding PDF Linearization, Page Trees, and Incremental Updates
RFC 8259 Guide: Strict JSON Parsing, BigInt Precision, and UTF-8 Safety
Frequently Asked Questions
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