Get to know
your digital world.
Create a QR code, find your IP address or inspect your website’s DNS and HTTPS details. Handle everyday digital tasks in one place. Simple, fast and free.
Whatever makes you curious.
Find an answer or create a QR code. Choose the tool for your task.
QR code generator
Create static QR codes for URLs, contacts, Wi-Fi, phone, email and text.
My IP address
Your public IP address, approximate location and network provider.
DNS lookup
Look up a domain’s IP, email and verification records.
IP blacklist check
Check your mail server IP against SpamCop and PSBL.
SSL & HTTPS check
Inspect HTTPS, HSTS, redirects and certificate log information.
Browser information
Explore your browser, operating system, language and hardware signals.
Screen information
See your resolution, pixel density and viewport size update live.
Connection information
Inspect HTTP, TLS and your edge connection in one place.
HTTP headers
Read your browser’s request headers and learn what they mean.
Subnet calculator
Calculate IPv4, CIDR, subnet masks and host ranges instantly.
It doesn’t have to be technical.
What does an IP address reveal? How does DNS work? Why does HTTPS matter? Understand the story behind the numbers and abbreviations.
A few things worth reading.
How to Create a QR Code: A Step-by-Step Guide
Learn to create static QR codes for URLs, contacts, Wi-Fi, phone and email. Customize colors and logos, export and test before printing.
What does your IP address reveal?
Understand public and private IP addresses, approximate location and VPNs.
Reading DNS records: from A to TXT.
A practical introduction to DNS records for website and email troubleshooting.
Beyond the padlock: HTTPS and TLS.
What does encryption protect? A guide to TLS, HSTS and certificates.