Use policy

Use the one-time checker for ordinary URL verification. Do not use it to target private systems or to cause harm.

• Do not use the service for vulnerability or port scanning, load testing, harassment, or denial-of-service activity.
• Do not attempt to access private, loopback, link-local, or other internal network destinations. Those are blocked.
• Only check links you are allowed to submit. A check sends a request to the destination website.
• Do not submit private URLs, password-reset or confirmation links, unsubscribe links, access tokens, or other secrets. If you opt in to a threat lookup, the full URL is sent to Google Safe Browsing.
• Account-based monitoring is limited to sites you own or have permission to monitor.

The operator may disable the public checker or signed-in features to protect the service. Results are not a safety guarantee, and the host may be offline.