Free Web Tools
Free web tools to check your public IP, scan QR codes, test internet speed, inspect HTTP headers, check website status, and detect user agents.
Choose a tool and get an instant result
BlinkCalc tools are designed to be fast, practical, privacy-conscious, and easy to understand. Every result is calculated in your browser.
Internet Speed Checker
Test your download speed, upload speed, and ping in your browser.
IP Address Finder
Instantly see your public IP address, city, ISP, and timezone.
QR Code Maker
Generate a QR code from any URL, text, or contact details.
QR Code Scanner
Decode any QR code by uploading an image or scanning live with your camera.
Website Status Checker
Check whether a website is reachable and view response details.
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Frequently asked questions
How do you know my public IP?
We call a free public IP lookup API from your browser and display the result. We don't keep a copy of it.
Is your internet speed test accurate?
It uses the same technique as most browser speed tests: downloading and uploading test data to a CDN endpoint. Results are usually within 5–10% of dedicated speed test sites.
Can I check if a website is down without installing anything?
Yes. The website status checker sends a request from your browser and reports the HTTP status code and response time.