Networking
Visual Traceroute Sandbox
Simulate TTL hops, ICMP Time Exceeded replies, latency, and packet loss without touching the network.
Client-side engineering utilities
Developer and network tools that run entirely in your browser.
A fast static utility hub for learning protocols, validating data, and debugging engineering workflows without backend calls or account friction.
Tool dashboard
10 tools
Networking
TCP Packet Builder
Craft TCP headers and inspect one's complement Internet checksum math step by step.
Developer
JSON Parser and Tree Viewer
Validate JSON, locate syntax errors, and browse deeply nested objects in a collapsible tree.
Networking
Subnet Mask and CIDR Visualizer
Convert CIDR prefixes into binary masks, host ranges, broadcast addresses, and subnet blocks.
Networking
DNS Lookup and TTL Inspector
Inspect DNS record structure and TTL behavior through a client-side educational resolver model.
Encoding
Base64 String and Binary Converter
Encode text, decode Base64, inspect bytes, and compare UTF-8 output in the browser.
Security
JWT Decoder and Header Inspector
Decode JWT headers and payloads locally while highlighting algorithm and expiration claims.
Developer
Cron Expression Descriptor
Translate cron expressions into clear schedules with next-run previews and field validation.
Developer
Regex Live Tester and Cheat Sheet
Test regular expressions against sample text with capture groups, flags, and quick references.
Security
Secure Password and Salt Generator
Generate passwords, salts, and entropy estimates locally with the Web Crypto API.