invoker.tools

Your public IP (IPv4/IPv6) as seen by the server, plus the request headers behind it.

Resolve A, AAAA, MX, TXT, NS, CNAME or SOA records for a domain via public resolvers.

List a domain's mail servers by priority and resolve each to its A/AAAA addresses.

Look up and parse a domain's SPF record; count DNS lookups and flag the all qualifier.

Resolve and parse the _dmarc policy, with warnings for p=none, missing rua and pct<100.

Fetch a DKIM public key by selector and flag revoked (empty p=) or test-mode keys.

Reverse DNS (PTR) + forward-confirmed reverse DNS (FCrDNS) for an IP address.

Inspect a host's live TLS certificate: expiry, issuer, SANs, chain and trust.

WHOIS/RDAP registration data for a domain or IP: registrar, status, key dates and nameservers.

Check an IPv4 address (or a domain's A record) against ~10 well-known DNS blacklists.

Fetch a URL and report HTTP status, response headers, the redirect chain and timing.

Check whether a website is up: HTTP status, response time and final URL after redirects.

Query several public DNS resolvers and compare their answers to check DNS propagation.

Check whether a TCP port is open on a host: open / closed / filtered verdict, resolved IP and connect timing.

Composite mail-deliverability check for a domain: MX, SPF, DMARC, DKIM, the MX host's PTR/FCrDNS and blacklist status, scored.

Generate one or many RFC 4122 version 4 (random) UUIDs.

Generate time-sortable ULID or UUIDv7 identifiers.

Generate a cryptographically strong random password with chosen character sets.

Generate a memorable diceware-style passphrase with an entropy estimate.

Compute a SHA-1/256/384/512 digest of text.

Encode or decode Base64 (UTF-8 safe).

Decode a JWT header + payload and read exp/iat/nbf.

Format (pretty-print), minify and validate JSON.

Convert text case (upper/lower/title/sentence/camel/pascal/snake/kebab/constant) with counts.

Convert an integer between binary, octal, decimal, hex and any base 2-36 (BigInt).

Convert a Unix octal file mode to symbolic notation and the chmod command.

IPv4 CIDR breakdown: network, broadcast, mask, wildcard, host range and usable count.

Validate a 5-field cron expression and return the next run times (UTC).

Generate a TOTP secret + otpauth URI, or compute the current 6-digit code for a secret (RFC 6238).

Generate SEO + Open Graph + Twitter Card meta tags for a page.

Generate Lorem Ipsum placeholder text by paragraphs, sentences or words.

Generate a harmonious 5-colour palette (random/analogous/complementary/triad/monochrome).

Parse raw email headers into a hop timeline with delays, SPF/DKIM/DMARC results and source IP.

Convert between a Unix timestamp (seconds or milliseconds) and a human-readable UTC date.

URL-encode or decode text (percent-encoding), in component or full-URL mode.

Convert between JSON and YAML.

Line-by-line diff of two texts, marking added, removed and unchanged lines.

Count characters, words, lines, sentences and paragraphs, with a reading-time estimate.