Free tools
Small tools for people who run production
No account, no sign-up wall. The calculators, the cron generator, and the webhook tester run in your browser. The website and DNS checkers run from 16 regions. The redirect checker follows up to 10 hops from one location. The badge is served from your public status page.
Availability
Website down checker
Is it down right now, or just for you? Check any URL you operate from 16 cities and see HTTP status, response time, and regional outages.
Check a site →DNS
DNS propagation checker
Resolve A, AAAA, CNAME, MX, TXT, NS, and CAA from 16 locations. Compare the answers, the TTL, and an expected value such as your status-page CNAME.
Check DNS →HTTP
Redirect checker
Follow a URL through up to 10 hops. See each status code, how long the hop took, and the response headers.
Trace a URL →TLS & expiry
SSL certificate checker
Inspect any hostname's TLS certificate: subject, issuer, valid-from and expiry dates, days remaining, TLS version, and chain issues.
Check a certificate →SLA math
Uptime calculator
Turn 99.9% or 99.99% into minutes of downtime per day, month, and year, or work backwards from an outage to the uptime you delivered.
Calculate →Scheduling
Cron expression generator
Turn a crontab like */5 * * * * into plain English, see the next run times, and copy snippets for crontab, GitHub Actions, Kubernetes, and systemd.
Build a schedule →README
Status badge builder
A live SVG badge for your README or docs that shows your status page's current state. Pick a label and style, copy the snippet.
Build a badge →Capacity
GPU resource calculator
How many GPUs an inference workload needs, the VRAM each one must have, and the monthly cost on AWS, GCP, and Azure.
Estimate →Alerts & payloads
Webhook & JSON tester
Paste a Slack, Discord, PagerDuty, or generic webhook payload, preview how the alert renders, sign it, and send a test.
Format a payload →Measure it instead of estimating it
QuickStatus runs HTTP, API, DNS, and TCP checks from five regions, opens the incident on your status page, and alerts you by email, Slack, Discord, PagerDuty, or webhook. Free for 10 checks.