Free tools for websites and cron jobs

Check a website's status, SSL certificate and security headers, or decode a cron schedule. Free, no account needed.

• Website down checkerIs it down for everyone or just you?Open tool
• SSL checkerExpiry date, issuer and errors of any site's certificateOpen tool
• HTTP headers checkerResponse headers and missing security headersOpen tool
• Cron expression explainerWhat a cron schedule means and when it runs nextOpen tool