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Utilities
DNS, TLS, email auth, Intune, day-to-day encoding, and a few things that are not IT. Most tools run in your browser. Press / to search.
46 tools
IP, DNS, VLAN, and packet-adjacent helpers.
IPv4/IPv6 CIDR, containment, VLSM split, aggregation, and SLAAC / EUI-64.
Test whether an IPv4 or IPv6 address falls inside a CIDR range.
802.1Q VLAN IDs, tag notes, and a suggested IPv4 subnet per VLAN.
Query A, AAAA, MX, TXT, NS, CAA and more, or fetch every common type at once.
PTR records for IPv4 and IPv6 addresses.
Domain and IP registration data via RDAP.
Lookup location, ISP, and ASN via ipapi.co.
OUI vendor hint from a device MAC address.
Check an IPv4 address against common DNS blocklists.
SPF, DKIM, DMARC, MX, and reporting.
Parse headers for SPF, DKIM, DMARC, routing, and metadata.
MX provider detection plus SPF, DKIM, DMARC, BIMI, MTA-STS, and TLS-RPT.
Build a v=spf1 TXT line and count DNS lookups against the 10-lookup limit.
RSA DKIM keypair plus selector TXT, split for 255-character DNS strings.
Build a DMARC TXT record with policy, reporting, and alignment options.
Receive or upload DMARC aggregate reports and read a human-friendly summary.
Certificates, keys, hashes, and tokens.
Live TLS cert, chain, protocol, SANs, expiry countdown, and HSTS.
Inspect subject, SANs, dates, and fingerprints from a cert PEM.
Create an RSA key and PKCS#10 CSR with SANs in the browser.
Generate SSH (RSA/ECDSA) and WireGuard keys locally. Private keys never leave the browser.
CSPRNG passwords, ambiguous-character filter, passphrases, and entropy estimate.
SHA-256/512, SHA-1, MD5, plus a bcrypt cost timing estimator.
Entra, Autopilot, KQL, and Win32.
Decode JWTs with expiry checks and Entra ID claim labels. Signature is not verified.
Well-known app IDs, Graph resource IDs, and directory role template IDs.
Sketch users, apps, conditions, grant, and session controls. Copy as markdown.
Decode a Windows Autopilot hardware hash and export CSV / serial fields.
Build file, registry, MSI, and script detection rules you can paste into Intune.
Copy-ready Advanced Hunting and Azure Monitor queries for sign-in, Intune, and Defender.
Compose Active Directory search filters with AND/OR/NOT and common attributes.
JSON, YAML, Base64, time, and text.
Parse curl or raw HTTP, and build a curl command. Does not send the request.
Encode files to Base64 or decode Base64 to a downloadable file.
Convert between YAML and JSON in the browser.
Pretty-print, minify, validate JSON, and evaluate a simple JSONPath.
JavaScript RegExp tester with matches and replacement preview.
Map extensions to MIME types and back.
Create a QR image from text or a URL and download PNG.
encodeURI / encodeURIComponent helpers for query strings and OData.
Convert GitHub-style markdown tables to CSV and back.
Convert between Unix epoch and local/UTC date-times.
5-field cron plus Azure Logic Apps, GitHub Actions, and systemd OnCalendar.
Build an .ics window or weekday working hours in a chosen timezone.
Bulk UUIDv4 and UUIDv7, with Windows GUID formatting options.
Ports, HTTP, Event IDs, and GUIDs.
Helpers that do not sit in the IT buckets.