ttykit - curl-friendly developer tools

  curl ttykit.com/datediff    Count days between two dates (or POST a file of dates), optionally excluding weekends/holidays.
  curl ttykit.com/myip    Your public IP address, with optional geo/network details.
  curl ttykit.com/thisip    ASN/location info for any IP address, via Cloudflare Radar.
  curl ttykit.com/unixtime    Convert between unix time and ISO 8601 dates.
  curl ttykit.com/headers    Echo back the request's own headers.
  curl ttykit.com/uuid    Generate random (v4) UUIDs.
  curl ttykit.com/dns    Look up DNS records for a domain, via Cloudflare's public resolver.
  curl ttykit.com/cve    Look up a CVE's summary, CVSS score, and references, via NVD.
  curl ttykit.com/jwt    Decode a JWT's header/payload (no signature verification).
  curl ttykit.com/base64    Encode/decode base64 (POST body), UTF-8 safe.
  curl ttykit.com/urlencode    Percent-encode/decode text (POST body).
  curl ttykit.com/whois    Domain registration lookup, via RDAP.
  curl ttykit.com/cron    Work out when a cron expression will next run (UTC).
  curl ttykit.com/qr    Generate a QR code, printed right in your terminal (or as SVG).

Each tool also works as its own subdomain, e.g. curl datediff.ttykit.com