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.
How to choose the right tool
Web tools help inspect browser, network, website, and QR-code details without installing a separate utility.
Web tools may use URLs, domains, QR images, browser metadata, or network test data.
Choose by need
- Use network tools for IP lookup, speed checks, website status, and HTTP headers.
- Use QR tools when creating or reading codes from text, URLs, contacts, or Wi-Fi details.
- Use browser tools for user agent, screen, viewport, and device information.
Common tasks
- Check whether a site returns a working HTTP status.
- Decode a QR code from an image.
- Find your public IP address or user agent string.
Choose a tool and get an instant result
BlinkCalc tools are designed to be fast, practical, privacy-conscious, and easy to understand. Many tools process inputs directly in your browser; tools that need a remote request explain that processing on their page.
Internet Speed Checker
Test your download speed, upload speed, and ping in your browser.
IP Address Finder
Instantly see your public IP address and visible country.
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?
The page requests your public IP and basic network details from external lookup services and displays their response. Those services receive your IP as part of the network request.
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 the full URL you enter to a remote status service, which performs the live check and returns the HTTP status and response time. Do not submit private or credential-bearing URLs.