Free uptime tools
Small calculators and checkers for the questions that come up around uptime, SLAs and monitoring.
Want this checked around the clock? Start monitoring
Questions
Are these tools free?
Yes. They need no account, and the calculators work everything out in your browser.
How do I keep checking a site after a one-off test?
Add it as a monitor in OpenUptime. Monitors check on a schedule and alert you when a check fails.
免费可用性工具
围绕可用率、SLA 和监控常见问题的小型计算器与检测工具。
想全天候自动检查？ 开始监控
常见问题
这些工具免费吗？
免费。它们不需要账号，计算器的所有计算都在你的浏览器里完成。
单次测试之后，怎么持续检查一个网站？
在 OpenUptime 里把它添加为监控。监控会按计划检查，检查失败时通知你。