A growing library of small utilities and trainers.
21 tools
Encode and decode Base64 strings instantly. Simple client-side Base64 tool for developers and engineers.
A one-stop BGP learning and reference hub with state guides, attributes, best path selection, peering models, commands, and a searchable knowledgebase.
RF, carrier, failover, latency, and transaction-focused tools for cellular WAN troubleshooting.
16 tools
Calculate CIDR subnets instantly and learn how subnetting works step-by-step.
Look up DNS records for any domain — A, AAAA, MX, TXT, NS, and CNAME — using multiple resolvers.
Paste Cisco ACL, iptables, or UFW rules and get plain-English explanations of what each rule does.
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly and create secure passwords with a cryptographic random generator.
Simulate HTTP request flows for status codes like 200, 401, 403, 404, 502, 503, and 504 with animated layer visualization.
Understand Cisco IP SLA operation types, generate ready-to-paste IOS config, and reference latency/jitter thresholds for VoIP, video, and data traffic.
Understand, troubleshoot, and reference IPSec VPN tunnels — phases, diagnostics, commands, and configs.
Format, minify, and validate JSON instantly. Clean JSON pretty print and validator tool.
Decode JWT tokens instantly and inspect the header, payload, and common claims with pretty-printed JSON.
Calculate MTU test payload sizes and generate ping commands for Linux, Windows, Cisco, Junos, and more.
Simulate network address translation flows and understand NAT types.
Quick, searchable explanations for common Wireshark and tcpdump terms, flags, patterns, and troubleshooting notes.
Test regular expressions online with live match highlighting, regex flags, and match group output.
Decode serial notation like 9600 8N1, calculate effective throughput, compare RS-232/422/485, and reference flow control, DB-9 pinouts, and standard baud rates.
Animated TCP 3-way handshake and connection close visualizer with SYN/ACK/FIN/RST explanations.
Convert Unix timestamps to dates and dates to Unix timestamps in seconds or milliseconds with timezone support.
Encode and decode URLs instantly with percent encoding. Supports URL components, full URLs, and form-style + space encoding.
VLAN ID ranges, 802.1Q tag anatomy, trunk vs. access port modes, native VLAN security, and QinQ — a complete reference for network engineers.