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Site Info & FAQ

🔒 Privacy & Security: All tools run entirely in your browser. No data is sent to external servers—your information never leaves your device.

💾 Settings Storage: Your preferences (tool visibility, theme, layout) are saved locally in your browser using localStorage. These settings persist across visits.

🎨 Customization Features:

  • Quick Search: Press / anywhere on the page to jump to the search bar. Press Esc to clear and close
  • Category Filters: Use the filter pills below the search bar to narrow tools by category
  • Recently Used: Tools you use are remembered and shown as quick-access chips at the top of the page
  • Drag & Drop: Rearrange tool cards by clicking and dragging them to your preferred order
  • Show/Hide Tools: Toggle individual tools on/off in the Filter & Customize section
  • Day/Night Theme: Switch between dark and light themes with the plug toggle button
  • Layout Reset: Return all tools to their original order with the "Reset Layout" button

⚡ Smart Caching & Performance: Responses are cached locally to speed up repeated queries and reduce API usage. Cache durations vary by tool type (1 minute to 30 days based on data stability).

📊 Rate Limits & API Usage: To ensure fair usage and stay within free tier API limits, the following rate limits apply:

  • DNS Checker: 45 requests/minute, 1,500/day
  • WHOIS Lookup: 45 requests/minute, 1,000/day
  • ISP Checker: 45 requests/minute, 1,000/day
  • MAC Lookup: 30 requests/minute, 1,000/day
  • SSL/Port Scanner: 60 requests/minute, 10,000/day
  • Note: You'll receive warnings when approaching limits. Type showAPIUsage() in browser console to view your current usage.

🗑️ Settings Reset: Your saved settings will be cleared if you:

  • Clear your browser cache or cookies
  • Use incognito/private browsing mode
  • Switch to a different browser or device
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❓ Frequently Asked Questions

What is duckTyped?

duckTyped is a free collection of IT professional tools for DNS checking, SSL validation, password generation, WHOIS lookup, and network diagnostics. All tools work in your browser with no registration required.

Is duckTyped completely free?

Yes! All tools are 100% free with no hidden fees, no registration, and no credit card required. We believe IT tools should be accessible to everyone.

Is my data private and secure?

Yes! Most tools process everything client-side in your browser. Your data never leaves your device. We don't collect, store, or share any personal information.

Can I use these tools offline?

Most tools work offline! The Password Generator, Plain Notes, and Encrypted Note Sender work without internet. Network tools like DNS Checker and WHOIS Lookup require connectivity.

What tools are included?

We offer 21 professional tools including: Password Generator, Encrypted Note Sender, SSL Certificate Checker, WHOIS/IP Lookup, Port Scanner, Plain Notes, HTTP Latency Checker, ISP Checker, MAC Address Lookup, Email Header Analyzer, SMTP Checker, Email Validator, DNS Record Checker with SPF/DKIM/DMARC validation, QR Code Generator, QR Code Scanner, WiFi QR Generator, vCard QR Generator, URL Safety Checker, Redirect Checker, Broken Link Checker, and URL Metadata Extractor.

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Filter & Customize Tools

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💾 Settings Saved Locally Your preferences are saved in your browser:
  • Tool order & visibility
  • Color theme & day/night
⚠️ Settings Clear When:
  • You clear browser cache/cookies
  • Using incognito/private mode
  • Using a different browser/device
27 tools
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Random Password Generator

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Generate cryptographically secure random passwords with customizable length (8-64 characters) and character types. Free password generator for creating strong, unique passwords.

Generated Password:

Secure Note Sender

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Send encrypted messages securely. Messages are encrypted client-side using AES-256 encryption with customizable expiration times. Optional password protection for added security.

If unchecked, anyone with the link can read the message
Messages automatically expire for security
Share this link with the recipient:
🔒 Password Protected: Share the password separately (via phone, in person, etc.) for maximum security.
⏱️ Note: Messages automatically expire for security.

SSL Certificate Checker

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Check SSL certificate validity, expiration dates, and issuer information for any domain. Free SSL certificate validator for website security monitoring.

WHOIS / IP Lookup

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Lookup domain registration information, IP address details, ISP, location, and network information. Leave blank to automatically check your own IP. Free WHOIS lookup tool for domain research.

Port Scanner

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Check if specific ports are open or closed on any server. Select which ports to scan below.

Plain Notes

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Simple notepad with auto-save functionality. Your notes are saved locally in your browser with automatic backup every 30 seconds.

HTTP Latency Checker

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Measure website HTTP response time and connection latency. Test server connectivity and network performance. For true ICMP ping, use the external tools below.

ISP Checker by IP

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Identify ISP provider, organization, and geolocation from any IP address. Leave blank to automatically check your own IP, or enter any public IP address.

MAC Address Lookup

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Find network device manufacturer and vendor information from MAC addresses. Lookup OUI (Organizationally Unique Identifier) database.

MAC Address Format:
Accepted formats: 00:1A:2B:3C:4D:5E, 00-1A-2B-3C-4D-5E, 001A.2B3C.4D5E, 001A2B3C4D5E

OUI (First 6 characters): Identifies the manufacturer/vendor
Device ID (Last 6 characters): Unique device identifier

Useful Links:
• MAC Lookup Database
• Wireshark OUI Lookup
• IEEE OUI Registry

Email Header Analyzer

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Parse and analyze email headers to troubleshoot delivery issues. Check SPF, DKIM, DMARC authentication and trace email routing path.

How to get email headers:
Gmail: Open email → Click ⋮ (three dots) → "Show original" → Copy all text
Outlook: Open email → File → Properties → Copy "Internet headers"
Yahoo: Open email → More → "View Raw Message"
Apple Mail: View → Message → All Headers → Select and copy

What we analyze:
• Email routing path (all servers the email passed through)
• Delivery timeline and delays
• Sender information (IP, domain, SPF/DKIM/DMARC status)
• Authentication results (SPF, DKIM, DMARC)
• Spam score and filtering information
• Reply-To and Return-Path details
• Message-ID and threading information

SMTP Server Checker

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Test SMTP server connectivity and verify email server configuration. Check if your mail server accepts connections on common SMTP ports (25, 465, 587).

Email Address Validator

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Validate email address format, check domain existence, and verify MX records. Performs syntax validation, DNS lookup, and disposable email detection.

DNS Record Checker

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Check all DNS records for any domain including A, AAAA, MX, NS, TXT, SPF, DKIM, and DMARC. Free DNS lookup tool for troubleshooting email delivery and domain configuration.

QR Code Generator

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Generate QR codes for URLs, text, WiFi networks, and contact cards. Customize size and download as PNG.

QR Code Scanner

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Scan and decode QR codes from images. Upload a QR code image or use your camera to scan. Free QR code reader and decoder.

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URL Safety Checker

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Check if a URL is safe before clicking. Detects phishing, malware, suspicious patterns, and verifies SSL certificates. Protect yourself from malicious links.

URL Redirect Checker

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Follow URL redirects and see the complete redirect chain. Identify all 301, 302, and other HTTP redirects. Essential for SEO and debugging.

Broken Link Checker

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Check if a URL is working or broken. Get HTTP status code, response time, and server information. Quick uptime verification.

URL Metadata Extractor

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Extract page title, description, Open Graph tags, and metadata from any URL. See how links appear when shared on social media.

Traceroute

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Trace the network path to any host. See every hop your data takes, with IP addresses and response times. Essential for diagnosing routing issues.

Reverse DNS Lookup

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Look up the hostname associated with an IP address. Reverse DNS (PTR record) lookup helps identify servers and verify email sending infrastructure.

Subnet Calculator

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Calculate network address, broadcast address, subnet mask, and usable host range from an IP address and CIDR notation.

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Security Headers Checker

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Analyze a website's HTTP security headers and get a grade from A+ to F. Check for HSTS, CSP, X-Frame-Options, and more.

Password Breach Checker

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Check if a password has appeared in known data breaches using the Have I Been Pwned API. Uses k-anonymity — your full password is never sent over the network.

🔒 Privacy Note: Your password is hashed locally using SHA-1. Only the first 5 characters of the hash are sent to the API (k-anonymity). Your actual password never leaves your browser.

Blacklist / RBL Checker

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Check if an IP address is listed on major email blacklists (DNSBL/RBL). Checks Spamhaus, Barracuda, SpamCop, SORBS, and more.

Tech Stack Detector

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Detect what technologies a website uses — CMS, frameworks, analytics, CDNs, hosting, and more. Analyze server headers and HTML source.

Robots.txt & Sitemap Analyzer

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Analyze a website's robots.txt file and sitemap. Check crawl rules, find sitemaps, and see how search engines interact with the site.

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