Reminder Library ยท Developers & IT ยท Updated July 2026

Nothing says "trust us" like a full-page browser warning.

An expired certificate is a total outage with extra embarrassment: the site is up, but every visitor is told to run. The fix is a renewal you forgot.

First 5 reminders free ยท No app, no signup, no forms

How to set an SSL certificate expiry reminder on WhatsApp

To set an SSL certificate expiry reminder on WhatsApp, text NagMeLater "Remind me on 10 August to renew the SSL certificate", or tap a button below to send it in one tap. The bot confirms the schedule and nags you at the right moment. No app, no signup, first 5 reminders free.

Two weeks before expiry

Edit to your cert's date, buffer included.

Message that gets sentRemind me on 10 August to renew the SSL certificate

Monthly automation check

Verify the auto-renewal actually renewed.

Message that gets sentRemind me on the 1st of every month at 10am to check SSL certificates renewed correctly

Yearly wildcard renewal

For paid certificates renewed annually.

Message that gets sentRemind me every year on 1 November to renew the wildcard SSL certificate

Why certificates expire in production

90-day cycles outpace human memory

Modern certs from Let's Encrypt expire every 90 days by design. The design assumes automated renewal, and automation assumes someone checks it still works.

Renewal automation rots quietly

The cron job broke during a server migration two months ago. Nothing alerts you, the old cert is still valid, until day 91 at 3am.

The one manual cert is the one that lapses

The wildcard cert bought yearly, the internal tool, the load balancer cert uploaded by hand: anything renewed manually is a candidate for the next incident.

Certificate hygiene that prevents 3am pages

Monitor the renewal, not the expiry

By the time an expiry monitor fires, you are in incident mode. A monthly "did certbot actually renew everything" check catches broken automation with 60 days of slack.

Inventory the certs nobody owns

The main site is fine, it is the staging subdomain, the API gateway and the mail server cert that lapse. List them once, one reminder each, and the surprise outages stop.

Browsers are getting stricter, not kinder

Maximum certificate lifetimes keep shrinking industry-wide, which means more renewals per year, not fewer. The manual-renewal era is ending, your checks matter more.

How NagMeLater handles it

1

You send the text

The button pre-fills it. Plain words, no format to learn, no reminder app to install.

2

It understands the schedule

Date, time and recurrence are parsed from your message and confirmed instantly.

3

The nag arrives on time

Right inside WhatsApp, where you will actually see it. Reply done, snooze it, or edit it any time.

Questions people ask

We use Let's Encrypt with auto-renew. Do we still need this?

That is exactly who needs the monthly check reminder. Auto-renew works until it silently does not, the nag makes a human verify.

Can the reminder go to the on-call engineer?

Set up a group and target them: "remind @Ops on the 1st to verify cert renewals". It arrives on WhatsApp, no dashboard login required.

How early should the renewal reminder fire?

Two weeks for automated stacks, a month for anything involving a purchase order. Certificates can be renewed early without losing time.

What else expires alongside certs?

Domains, API keys, cloud credits and access tokens. Each is one message: "Remind me on 1 March to rotate the payment gateway API keys".

Is there a SSL certificate expiry reminder app for WhatsApp?

You do not need one. NagMeLater works inside WhatsApp itself, so there is nothing to install, update or remember to open. Text it "Remind me on 10 August to renew the SSL certificate" and the reminder exists. The best SSL certificate expiry reminder app is the chat app you already check all day.

Related reminders

Browse the full Reminder Library โ†’

Set it in the next ten seconds.

The button opens WhatsApp with "Remind me on 10 August to renew the SSL certificate" already typed. Send it, and it is handled.