Technical guides for every NetTools.tech tool — what it does, how it works, how to read the results and how to troubleshoot — plus articles for system administrators, DevOps engineers and security professionals.
Tool guideWeb & SEO Utilities
What URL (percent) encoding is, the difference between encodeURIComponent, encodeURI and form encoding, and how to decode, debug and break down URLs with the NetTools.tech URL Encoder / Decoder.
Tool guideWeb & SEO Utilities
How URL shorteners work, how the NetTools.tech URL Shortener checks destinations, creates expiring links without click tracking, and how to delete a link with its token.
Tool guideMy Info & Identity
How user-agent strings and User-Agent Client Hints work, why browsers freeze and reduce them, how to analyze a UA from your logs, and what the NetTools browser report shows about your device, display, locale and capabilities.
Tool guideWeb & SEO Utilities
How the NetTools.tech Website Authority Checker looks up Open PageRank scores, what score, rank, referring domains and history mean, and how to use link-based authority without over-reading it.
Tool guideSecurity & Testing
What an automated exposure assessment checks and what it deliberately never does, how DNS TXT ownership verification unlocks path checks, how findings and the exposure score are calculated, and how to fix the most common issues.
Tool guideMy Info & Identity
How the public IP address of your connection is determined, what the registry, BGP, reverse DNS and location data around it mean, and how to troubleshoot VPN, NAT and IPv4/IPv6 surprises.
Tool guideDNS & Domains
What WHOIS and its successor RDAP return for domains and IP networks, how the authoritative registry is found, how to read status codes and dates, and what the data cannot tell you.
Tool guideEmail Tools
What DKIM is, where the public key lives in DNS, how to find a selector, how the NetTools.tech DKIM Lookup decodes the key and reports its type and size, and how to fix missing or weak keys.
Tool guideEmail Tools
How DKIM signing works, how the NetTools.tech DKIM generator creates an RSA key pair locally with Web Crypto, and how to publish the record, install the private key and rotate selectors safely.
Tool guideConversion & Calculation Tools
How decimal and binary storage units differ, why drives look smaller in your operating system, and how the NetTools.tech converter shows every unit side by side with exact results.
Tool guideConversion & Calculation Tools
Convert clock frequencies exactly between Hz and THz, read the clock period of one cycle, and understand why GHz alone does not compare processors.
Tool guideEmail Tools
How the NetTools.tech Bulk DNS / Email Lookup queries one record type for up to 25 domains through Cloudflare's resolver, how to check SPF and DMARC in bulk, and where batch lookups reach their limits.
Tool guideWeb & SEO Utilities
How the NetTools.tech Broken Link Checker crawls a page or a small part of a site, how it classifies every link as OK, redirect, broken, error or blocked, and how to act on the results.
Tool guideConversion & Calculation Tools
A practical explanation of bits versus bytes and SI versus IEC prefixes, how network speeds translate into bytes per second, and how to read the tables in the NetTools.tech Bits & Bytes Explainer.
Tool guideConversion & Calculation Tools
How volume = bandwidth × time × efficiency drives all three calculator modes, how to size a link for a backup window, and why real transfers are slower than the theoretical result.
Tool guideNetwork Diagnostics
What ASNs are, how BGP uses them, how the NetTools.tech ASN lookup finds the responsible registry via IANA RDAP bootstrap, and how to read holder, status, dates and special-use ranges.