Blog

Practical, technical articles that pair with our free tools. No fluff — just clear explanations you can use when debugging networks, shipping web apps, or protecting your privacy.

• Jun 10, 2026Cookie & Tracking Status Checker — What Your Browser Exposes (2026)Understand first-party cookie probes, HttpOnly blind spots, web storage failures, Global Privacy Control, and why sandboxed pages cannot audit every tracker.
• Jun 8, 2026How Accurate Is IP-Based Location?How close IP geolocation really gets — measured against GPS, Wi-Fi, and cell positioning — and the practical reasons your result shows the wrong city.
• Jun 8, 2026Which Ports Should Be Open (and Which Are Risky)A plain-English guide to which network ports are safe to leave open, which to harden, and which should never face the internet — with a quick-reference risk table.
• Jun 7, 2026What Your Browser Reveals About YouYour browser quietly hands every site a profile: browser, OS, screen, GPU, language, timezone, and a canvas fingerprint. Here's what's exposed, how it builds a unique fingerprint, and how to reveal less.
• Jun 6, 2026DNS Records Explained (A, AAAA, MX, TXT, CNAME)What each DNS record type does — A and AAAA for addresses, MX for email, CNAME for aliases, TXT for verification and SPF/DKIM, NS for nameservers — plus TTL and propagation in plain English.
• Jun 6, 2026How to Fix a VPN Leak (WebRTC, DNS, IPv6)A VPN can still leak your real IP through WebRTC, DNS requests, or IPv6. Here's how each leak happens and the exact steps to fix it in your browser, OS, and VPN app.
• Jun 6, 2026How to Read Your Internet Speed Test ResultsWhat download, upload, ping, jitter, and bufferbloat (latency under load) actually mean — and the numbers that decide whether streaming, gaming, and video calls feel good.
• May 31, 2026What Can Someone Do With Your IP Address? 7 Real Risks (and How to Protect Yourself)Worried someone has your IP address? Here's exactly what they can and can't do with it, the 7 real risks ranked by likelihood, and step-by-step ways to protect yourself.
• May 4, 2026VPN Leak Test Explained — WebRTC vs DNS vs IP (What Web Pages Can See)Understand WebRTC ICE srflx leaks, why browsers cannot fully test DNS resolvers, and how to compare HTTPS-visible IPs with STUN-derived candidates in 2026.
• May 2, 2026What Is My Open Ports? How to Check TCP Ports on Your Public IPLearn what open, closed, and filtered ports mean, which ports are security risks, and how to check your public IP's open ports without any software.
• May 1, 2026What Is My WebGL GPU? How Browsers Expose Your Graphics CardHow the WebGL API lets browsers reveal your GPU renderer, vendor, max texture size, and graphics capabilities — plus what this means for privacy, fingerprinting, and web performance.
• Apr 30, 2026What Is My Network Type? How Browsers Detect Wi-Fi vs CellularHow the Network Information API exposes connection type, effective speed class, and estimated bandwidth — and why Firefox and Safari don't support it.
• Apr 29, 2026Browser Latency: Ping vs HTTPS Round-Trip (What Web Pages Can Measure)Why websites cannot run ICMP ping, what HTTPS RTT actually measures, and how to interpret same-origin latency checks in 2026.
• Apr 22, 2026What Is DNS Resolution? A Records, AAAA, and DNS over HTTPS (DoH)How hostnames become IP addresses, why A and AAAA matter, what DNS over HTTPS changes on the wire, and what a normal website can (and cannot) discover about your DNS settings.
• Apr 20, 2026How to Find Your IP Address on Windows 11, Mac, iPhone, and Android (2026 Guide)Step-by-step ways to see your local and public IP on every major platform, plus when to use a browser-based checker instead.
• Apr 18, 2026IPv4 vs IPv6 Explained: What's the Difference and Which Are You Using?A practical comparison of address formats, NAT, adoption in 2026, and how to tell which protocol your connection prefers.
• Apr 16, 2026What Does Your User Agent Reveal About You? A Complete 2026 BreakdownHow UA strings are built, why servers read them, and how Client Hints and UA reduction change the privacy picture.
• Apr 14, 2026Internet Speed Explained: What Mbps You Actually Need in 2026Decode download, upload, latency, and jitter — plus realistic targets for 4K streaming, video calls, gaming, and working from home.
• Apr 12, 2026IP Geolocation: How Accurate Is It, Really?Why IP-based maps show city-level results, when they fail, and how VPNs and mobile carriers distort the picture.
• Apr 10, 2026Browser Fingerprinting: How Websites Track You Beyond CookiesThe signals that make your browser uniquely identifiable, how they differ from third-party cookies, and practical mitigations in 2026.
• Apr 8, 2026Understanding Timezones for Remote Workers and DevelopersUTC, DST, IANA zones, and why 'just use epoch milliseconds' is not enough for human-facing apps.
• Apr 6, 2026What Is a VPN and How Does It Change Your IP Address?Tunnels, encryption, split tunneling, and what actually changes when you flip a VPN on — without the marketing hype.
• Apr 4, 2026Device Pixel Ratio and Viewport: A Web Developer's Quick GuideCSS pixels vs hardware pixels, layout viewport vs visual viewport, and why your breakpoints look different on real phones.
• Apr 2, 202610 Browser Tools Every Remote Developer Should Bookmark (2026)A practical toolkit for debugging networking, rendering, and identity from the client side — including the eight free utilities on this site.

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