Network Tools
Ports, subnets, headers and device facts, decoded locally.
Device Info – What Your Browser Tells About Your Device
Network
Read-only view of your browser and screen: language, timezone, CPU threads, DPR and more.
Email Header Analyzer - Read Raw Mail Headers Locally
Network
Paste email headers to read From, To, Subject, dates, the Received chain and DKIM/SPF/DMARC fields.
HTTP Header Parser – Read Request and Response Headers
Network
Paste raw HTTP headers and get a clean key-value table with notes on about 30 common headers.
IP Tools – IPv4 Conversions and Address Types
Network
Convert an IPv4 address to integer, hex and binary, and identify private, loopback or public ranges.
MAC Vendor Lookup – Offline OUI Prefix Reference
Network
Normalize any MAC address format and look up its vendor from an offline OUI table.
Port Lookup – Well-Known Port Reference
Network
Look up about 60 well-known TCP/UDP ports by number or service name, fully offline.
SSL Certificate Parser - Inspect PEM Certificates Locally
Network
Decode a PEM certificate locally: subject, SANs, issuer, validity dates and SHA-256 fingerprint.
Subnet Calculator – Network, Broadcast and Host Range
Network
Enter an IPv4 address with CIDR or dotted mask and get network, broadcast, wildcard and host range.
User-Agent Parser – Browser, OS and Device at a Glance
Network
Paste a User-Agent string and see browser, engine, OS, device type and crawler detection.
User Agent Parser - Browser, Engine and OS from a UA String
Network
Parse any User Agent string into browser, version, engine, OS and device type, or read your own.
URL Sanitizer – Remove Tracking Parameters
Network
Strip utm_*, fbclid, gclid and other tracking parameters from links, with a per-item toggle.