Free tools

Useful tools,
no signup.

A growing set of single-purpose utilities we built for ourselves. No account, nothing tracked, nothing pinned to your IP. Just open one and use it.

Turn any uptime percentage or SLA into the real downtime budget it allows, per day, month, and year.

Compose a cron schedule visually, or paste an expression and get a plain-English explanation of when it runs.

A fast reference for every HTTP status code: what it means, when it fires, and how to debug it.

Live up/down checks for the services the internet runs on: ChatGPT, Cloudflare, AWS, GitHub, Stripe, Slack and more.

Want these on a schedule?

The full platform runs these checks every 30 seconds and pages you when something changes.

Start free

Uptime, cron, synthetic, logs, RUM, incidents, and status pages. Free tier on every product.