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.

• Sep 7, 2026How to Check If Your Password Was Leaked (Without Sending It Anywhere)Typing a password into a website to check it sounds reckless. Here is the method that makes it safe, how to verify the claim yourself, and why a clean result proves less than you think.
• Sep 7, 2026How to Read Email Headers: Delivery Path, Delays and Spam SignalsEmail headers record every server that touched a message, how long each held it, and whether the sender was who they claimed. Here is how to read them without guessing.
• Sep 7, 2026What to Send Your ISP or IT Support When Your Internet BreaksThe details support asks for every time — browser, OS, IP, ISP, latency, device — what each one is actually for, and how to collect all of them in one pass instead of ten.
• Sep 7, 2026Why Text From AI Tools Contains Invisible CharactersNarrow no-break spaces and zero-width characters turn up constantly in text from chatbots. Here is what they are, why the watermark theory is probably wrong, and which ones actually matter.
• Sep 7, 2026Why Won't My MP4 Play? How to Read a Video File's CodecAn .mp4 that refuses to play is almost never the file extension — it is the codec inside. Here is how to find out which one you have, and what to do about it.
• Jun 14, 2026How to Check Your Monitor's Refresh Rate (Hz) in 2026 — Browser, Windows, macOS & LinuxCheck your refresh rate in seconds. The exact steps for your browser, Windows, macOS, and Linux — plus how to fix a monitor stuck at 60Hz when it should run higher.
• Jun 14, 2026How to Stop WebGL Fingerprinting: Disable or Spoof It by Browser (2026)WebGL fingerprinting identifies your GPU with up to 98% accuracy without cookies. Here's how to block, spoof, or randomize it in Brave, Firefox, Tor, Chrome, and Safari — and how to test that it worked.
• Jun 14, 2026How to Stop Websites From Tracking You: A Practical 2026 GuideThe layered way to reduce online tracking — block third-party cookies, install a content blocker, harden your browser, and limit fingerprinting — plus how to test what's actually working.
• Jun 14, 2026How to Tell Your Internet Connection Type: Fiber, Cable, DSL, 5G & Wi-Fi (2026)How to identify whether you're on fiber, cable, DSL, satellite, fixed wireless, or mobile — using physical clues, your IP/ASN, and the browser — plus a speed and latency comparison of every connection type.
• Jun 14, 2026What Is a Good Ping? Latency Benchmarks for Gaming, Video Calls & Streaming (2026)A good ping is under 50 ms for gaming, under 100 ms for video calls, and under 150 ms for general use. See the full latency, jitter, and packet-loss benchmarks by activity — and how to test and lower yours.
• Jun 13, 2026How to Change Your User Agent (and Why Websites Still Know It's You)Step-by-step ways to change your user agent in Chrome, Firefox, Edge, and Safari — plus the honest reason spoofing alone rarely fools modern sites, and what actually does.
• Jun 11, 2026What Can Your ISP See? Everything Your Internet Provider Knows (and How to Hide It)Can your ISP see your browsing history, incognito tabs, and what you do on apps? Here's exactly what your internet provider can and can't see in 2026 — and how to hide it.
• Jun 11, 2026What Time Zone Am I In? How to Find Your Time Zone, UTC Offset, and DSTNot sure what time zone you're in? Here's how to find your exact time zone, UTC offset, and abbreviation in seconds — plus what DST means for your clock and how to fix a wrong one.
• 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, 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 Are 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 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 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 Accuracy: We Measured 2,000 Known LocationsWe compared IP geolocation against 2,000 RIPE Atlas probes with known coordinates. Median error 6.4 km, mean 152.9 km — accuracy is bimodal, not merely imprecise. Full data and method included.
• 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 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.

Prefer hands-on checks? Head to the tool directory or contact us.