Diagnostics tools
Inspect headers, DNS records, certificates, and redirects.
Apache / Nginx Log Parser
Parse Combined Log Format lines into structured rows with status mix, top paths, and per-row filtering.
CIDR / Subnet Calculator
Compute network, broadcast, host range, count, and mask for any IPv4 CIDR.
Content Security Policy Builder
Compose a CSP header by picking sources per directive, with copy-ready HTTP header and meta-tag output.
DNS Lookup
Query A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, and SRV records via Cloudflare's DNS-over-HTTPS API.
Docker Compose Validator
Lint a docker-compose.yml — parse the YAML, walk the structure, and flag common mistakes.
EXIF Viewer & Stripper
See what metadata is hidden in a photo — camera, GPS, timestamps — and strip it before sharing.
IP Address Classifier
Paste any IPv4 or IPv6 address and see whether it's public, private, loopback, multicast, reserved, or carrier-grade NAT.
SPF / DKIM / DMARC Parser
Paste an email-auth TXT record and see it broken down, validated, and explained.
Structured Data Tester
Paste JSON-LD or a page's HTML to validate schema.org blocks and see what each one declares.
User-Agent Parser
Decode any User-Agent into browser, OS, device, engine, and CPU fields.