Email & Messaging
Email Header Analyzer
Paste raw email headers to inspect routing hops, SPF/DKIM/DMARC authentication results, spam signals, and all header values.
DKIM Lookup
Look up a DKIM TXT record by domain and selector, and validate the public key.
iMessage Link Preview
Simulate how a URL will appear as a link preview when shared in iMessage. Shows Open Graph image, title, and description.
Mail Contact Generator
Generate PowerShell commands to create and configure Exchange Online mail contacts for external users.
Contact Card Reader
Snap a photo of a business card, OCR it in your browser, and generate a vCard (.vcf). Optionally email the .vcf to any address via the munroenet relay.
Network & Security
Ping Monitor
Continuously measure latency and probe loss to 1.1.1.1, 8.8.8.8, and your own hosts — measured from this device, with a live graph, a ping-style log, and desktop install.
NSLookup
Query DNS records (A, AAAA, CNAME, MX, TXT, and more) for any hostname via Cloudflare DNS.
URL Expander
Follow the full redirect chain of a shortened URL to reveal the final destination.
SSL Certificate Tester
Inspect SSL/TLS certificates for any URL, showing expiry, issuer chain, fingerprint, and days remaining.
Subnet Calculator
Adaptive IPv4 / IPv6 / IPv8 subnet calculator. Paste any CIDR and get the network, broadcast, usable host range, likely gateway, and address type.
FIPS Encryption Tester
Test whether a website supports FIPS 140-2/140-3 compliant cipher suites per NIST SP 800-52 Rev 2.
HTML to Markdown
Convert any webpage or HTML snippet to clean markdown. Fetch a URL or paste HTML directly. Strips ads, nav, and scripts.
AI
Chrome AI Playground
Chat with Chrome's built-in on-device model (Gemini Nano) via the LanguageModel API. Streams responses, runs fully offline, no network call at inference time.
Utilities
Passphrase Generator
Generate memorable, policy-compliant passphrases for new accounts.
HEIC Converter
Convert Apple HEIC/HEIF photos to JPEG, PNG, or WebP entirely in your browser — no upload required.
Nearest Airport Finder
Find the closest airport to any address or your current location, with IATA/ICAO code and distance.
IP Investigator
Deep-dive investigation of any IP: threat verdict, geolocation, WHOIS, Shodan ports/CVEs, GreyNoise classification, DNSBL blocklist check, and more.
Phone Investigator
Triage smishing & scam numbers: block carrier (OCN), line-type heuristic, rate-centre map, scam-pattern message classifier, and complaint/report deep links — all free, no API keys.