Check any website’s certificate and domain expiry in seconds. Get an email before either one lapses. Turn a spreadsheet into a chart you can paste anywhere. All free.
The utilities
Expiry Watch
Check any site in seconds: expiry, issuer, chain and hostname, plus when the domain itself renews. Watch up to 3 domains for free and get an email 30, 14, 7, 3 and 1 day before either one runs out.
Chart Link
Paste a spreadsheet, get a crisp chart image for email, Slack, slides and pull requests. Your data stays in your browser.
Why now
In April 2025 the CA/Browser Forum voted to cut the longest a public TLS certificate may last, step by step, from 398 days to 47. Shorter certificates are safer, but every renewal is another chance for one to slip.
At least 8 renewals a year at 47 days
Free monitoring
Watch up to 3 domains for free. We check them every day and email you only when a date gets close or something breaks.
Enter the domain and your email, then confirm from your inbox. No account, no password.
The certificate, its chain and hostname, and the domain’s registration date. A failed check is never mistaken for an expiry; we tell you if your site stays unreachable for 3 days.
An email 30, 14, 7, 3 and 1 day before a certificate or domain expires. One click unsubscribes.
How we work
Checks, the chart builder and monitoring for 3 domains cost nothing. No card, no trial clock.
If a check fails, we say it failed. We never guess a date or call a broken check fine.
Chart Link draws in your browser, so pasted data never leaves it. Analytics are cookieless.
Confirmed sign-ups only, alerts about your own domains, and one-click unsubscribe in every message.
Guides
Questions
Something else? Write to hello@boringutils.com.
Nothing for everything on the site today: certificate and domain checks, monitoring for up to 3 domains, and the chart builder.
Paid plans for longer watch lists and hosted chart links are in early access. Joining the list is free and commits you to nothing.
A site’s TLS certificate: when it expires, who issued it, whether its chain is trusted, and whether it covers the hostname. It also looks up when the domain registration itself expires, using RDAP.
Add up to 3 domains and confirm your email address. We check them every day and email you 30, 14, 7, 3 and 1 day before a certificate or domain expires, and once if a certificate stops being valid. Every email has a one-click unsubscribe.
Domain registration alerts need the registry to publish an expiry date over RDAP. Many country-code domains, like .io and .de, don’t, so for those you get certificate alerts only.
No. Expiry Watch only reads what any browser can see. It never logs in to your server or registrar and can’t change anything. It tells you in time to renew, or to check that your automation did.
Bar, line, area, pie, donut and scatter charts from pasted CSV or JSON. Export them as SVG or PNG and use them anywhere.
Hosted chart image links, for places where JavaScript can’t run like email, Slack, PDFs and pull requests, are in early access.
We use it only to send what you signed up for. We don’t sell or share it, and unsubscribing stops all email. The privacy policy has the details.
Free for up to 3 domains. We confirm your address first, and every email has a one-click unsubscribe.
