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NetworkToolbox.de

Professional online tools for network analysis, DNS lookups, email diagnostics and more. Fast, reliable and free.·networktoolbox.de

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NetworkToolbox.de is a collection of free online tools for network analysis, DNS lookups, and email deliverability diagnostics. It offers DNS record lookups (A/AAAA, MX, TXT, NS, SOA, CNAME, PTR, CAA, WHOIS, Dig), mail authentication checks (SPF, DKIM, DMARC), and general utilities such as IP geolocation, QR code generation, screenshots, screen recording, JSON/XML formatting, text analysis, and PDF-to-text extraction. All tools are accessed directly through the website.

What it's for

Analyze DNS records of a domainCheck email deliverability via SPF, DKIM, and DMARCFind the geographic location of an IP addressLook up domain WHOIS registration informationDetermine public IP address, provider, and browser infoGenerate QR codesTake screenshots of desktop, window, or browser tabRecord screen, window, or browser tab as videoFormat and validate JSON/XML dataExtract text from PDF filesAnalyze keyword density and word/character counts

Features 24

A/AAAA Lookup
Browser Info display
CAA Lookup
CNAME Lookup
Dig (DNS Query) tool
DKIM Lookup
DMARC Lookup
IP Geolocation mapping
JSON/XML Formatter and validator
Keyword Density analyzer with word cloud
MX Lookup
My IP Address lookup
NS Lookup
PDF to Text extraction
PTR Lookup (Reverse DNS)
QR Code Generator
Screen recording (video)
Screenshot capture (desktop/window/browser tab)
SOA Lookup
SPF Lookup
Text Analyzer (word/character/sentence count)
TXT Lookup
Website Screenshot tool
WHOIS Lookup

At a glance

free tier

TypeWeb app

DeploymentCloud

PlatformsWeb

LanguagesGerman, English, Dutch, Spanish

Resources

Pricing

Site describes itself as free ('kostenlos'); no pricing plans or paid tiers are publicly listed.