Free tools
Small tools around reachability and availability. No sign-up, straight in the browser.
Is my website up?
Check for free whether your website is reachable right now: HTTP status, response time, redirects and TLS. Instant result, no sign-up.
Open →Check SSL certificate
Check for free when a domain SSL certificate expires: days left, expiry date and issuer. Instant result, no sign-up.
Open →SLA and uptime calculator
How much downtime does 99.9 percent allow? Convert availability into minutes per day, week, month and year, and back.
Open →Downtime cost calculator
Work out what a website outage costs: lost revenue per hour and for an outage nobody notices. Free, no sign-up.
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