Free Tools
Website Uptime & Status Tools
Free, no-login tools for checking website availability, calculating SLA downtime budgets, and testing multiple URLs at once.
Measure DNS, TCP, TLS, redirect chain, and time-to-first-byte for any domain. Server-side timing — not a full browser render.
Send a live HTTP request to any URL and see the exact status code returned — 200, 301, 404, 5xx and Cloudflare-specific codes.
Paste up to 20 domains and check them all at once. Live up/down status for every URL in one pass — no refresh required.
Convert uptime percentages to real downtime. See exactly how much downtime 99.9%, 99.99%, or any SLA actually allows per month.
Check any website
Use the main checker on the homepage to send a live HTTP probe from our serverless infrastructure plus an AI source scan across social media and status pages.
Go to checker →