NetworkToolbox.de
Professional online tools for network analysis, DNS lookups, email diagnostics and more. Fast, reliable and free.
Quick Access
DNS & Domain
Dig (DNS Query)
Query and analyze DNS records of a domain.
MX Lookup
Query mail exchange records of a domain.
A / AAAA Lookup
Find IPv4 and IPv6 addresses of a domain.
TXT Lookup
Check TXT records including SPF, DKIM and verifications.
NS Lookup
Query nameservers of a domain.
SOA Lookup
Query Start of Authority record of a domain.
CNAME Lookup
Query Canonical Name records (aliases) of a domain.
PTR Lookup
Reverse DNS - Find hostname for an IP address.
CAA Lookup
Query Certificate Authority Authorization records.
WHOIS Lookup
Retrieve domain registration information.
Mail & Deliverability
SPF Lookup
Analyze and validate SPF records.
DKIM Lookup
Check DKIM keys and signatures.
DMARC Lookup
Analyze DMARC policy of a domain.
Analysis & Utilities
QR Code Generator
Create QR codes for URLs, text and more.
Screenshot
Capture screenshots of your desktop, window, or browser tab.
Screen Recorder
Record your screen, window, or browser tab as video.
JSON/XML Formatter
Format, validate and display JSON and XML as tree view.
Text Analyzer
Count words, characters, sentences and analyze text.
PDF to Text
Extract text from PDF files.
Keyword Density
Analyze keyword frequency and density with word cloud.
Website Screenshot
Create screenshot of any website.