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Build the five fields of a cron line without guessing, read back in plain words what an existing one does, and see when it would run next.
You can also paste an expression you already have and we tell you what it does.
Replace the command with yours. If you add a heartbeat monitor, paste its URL at the end of the line and we will tell you the day the job stops running.
Minute, hour, day of the month, month and day of the week, in that order. An asterisk means "every one".
Every 15 units of that field. In the minutes field, */15 means at minute 0, 15, 30 and 45 of every hour.
That is exactly what a heartbeat monitor is for: your script tells us it finished, and if one day it does not, we tell you. Add one free and paste the line this page gives you.
Everything at once, with a grade from A to F.
See every DNS record of a domain: A, AAAA, CNAME, NS, MX, TXT, SOA and CAA, as our resolve...
Registrar, creation and expiry dates, nameservers and transfer lock of any domain. The exp...
Is the certificate valid, who issued it, when does it expire and which TLS versions does t...
IP address, country, network and the hosting provider we deduce from it. Also whether the...
MX, SPF, DKIM and DMARC. If any of these is missing, anyone can send email in your name, a...
HSTS, Content-Security-Policy, X-Frame-Options and the rest: the headers that protect your...
Where does a URL end up, and through how many hops. Redirect chains slow every visit down...
Meta robots, X-Robots-Tag header and robots.txt. Launching a site with a "noindex" left ov...
We request the site right now from our server and tell you the status code and the respons...
Write a network in CIDR notation and get the mask, the range of usable addresses, the broa...