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.
Trace every 301, 302, 307, 308 hop a URL takes to its final destination. Time per hop and HTTPS downgrade detection included.
Look up A, AAAA, CNAME, MX, NS, and TXT records for any domain. DNS lookup time included.
Validate any HTTPS site's TLS certificate — issuer, expiry date, SAN list, TLS version, and cipher.
Inspect the HTTP response headers any site returns — security, cache, content, and server identity bucketed for you.
Identify which CDN or edge platform a site uses — Cloudflare, Fastly, Vercel, Akamai, CloudFront, and more.
When does a domain expire? Look up registrar, registration date, and expiration via RDAP — no API key needed.
Test any HTTP(S) endpoint with custom method, headers, and JSON body. See status, latency, response sample.
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 →