IT Engineering, Network & SecOps Tools Hub
Enterprise utilities engineered for daily operational velocity. 95% of tools process strictly client-side with zero data transmission.
CCTV HDD Storage & Bandwidth Calculator
Calculate surveillance hard drive capacity based on camera channels, H.265 codecs, and retention days.
PoE Switch Power Budget Calculator
Dimension switch PoE power supply budgets for IP cameras and Wi-Fi APs per IEEE 802.3af/at/bt.
Wi-Fi Diagnostics & Speed Test
Real-time in-browser latency, jitter, download throughput measurement, and Wi-Fi RF channel reference guide.
Cisco IOS & IOS-XE Command Handbook
Comprehensive field cheat sheet for Cisco IOS/IOS-XE: VLANs, Trunking, LACP, OSPF, NAT, Port Security.
Code Format & File Converter
Bidirectional JSON, YAML, Base64 converter and secure offline PDF-to-Word conversion runbook.
Subnet, CIDR & VLSM Calculator
Subnet IPv4/IPv6, host ranges, wildcards, and visual VLSM planner running 100% client-side.
Port & Protocol Reference
Searchable database of standard IANA ports, service mappings, and hardening notes.
Network Config Snippet Generator
Generate syntax-accurate configuration snippets for Cisco, Fortinet, Ruijie, and MikroTik.
DoH DNS Record Lookup & DNSSEC Checker
Encrypted DNS-over-HTTPS lookup for A, AAAA, MX, TXT, SPF, DMARC, CAA records and DNSSEC validation.
SSL/TLS Certificate Inspector
Inspect certificate chains, expiry countdowns, SAN coverage, and TLS versions with strict SSRF defense.
HTTP Security Headers Analyzer
Grade HTTP headers from A+ to F (CSP, HSTS, COOP, CORP) with copy-paste remediation rules.
CVSS v3.1 / v4.0 Calculator
Interactive FIRST.org compliant CVSS v3.1 calculator with vector generation.
Hash Generator & Identifier
Generate cryptographic hashes for text and files locally via Web Crypto API; identify hash algorithms.
JWT Decoder & Inspector
Inspect JWT header and payload claims client-side; detects alg none and expiration issues.
Password Generator & Strength Meter
Generate cryptographically strong passwords and passphrases; evaluates Shannon entropy and crack time.
IOC Defang / Refang & Artifact Extractor
Defang and refang IPs, URLs, domains for safe incident reporting; extract IOCs from security logs.
Critical Exploited Vulnerabilities Feed
Curated real-time feed of actively exploited CVEs from CISA KEV and NVD with vendor filters.
Windows BSOD & Error Code Lookup
Windows NTSTATUS, HRESULT, and stop code database with root causes and troubleshooting commands.
IT Troubleshooting Decision Trees
Interactive step-by-step diagnostic wizards for Network, Printer, Outlook, and Slow PC issues.
Cron Expression Builder & Explainer
Translate 5-part cron expressions into plain Vietnamese and English; preview next 5 execution times.
JSON Formatter, Validator & Minifier
Prettify, minify, and validate JSON syntax 100% client-side with zero data leakage.