Losing a domain or letting an SSL certificate expire usually happens for a boring reason: the renewal email went to an old inbox, the card on file expired, or the asset lives at a registrar nobody checks anymore.
TLDix keeps every renewal in one place. Enter a domain and TLDix looks up its WHOIS record, expiry date and SSL certificate automatically, then emails you 30, 7 and 1 day before anything expires. It works with every registrar and hosting provider.
Free tools, no sign-up needed: SSL checker, DNS lookup, WHOIS lookup, hosting checker and a domain name generator. The free plan covers 5 domains; paid plans add more assets, team members, webhooks and API access. Available in English, Turkish, Spanish and German.

Hi Fazier! I built TLDix after losing track of renewals across several registrars and hosting accounts. You add a domain, it reads WHOIS and the SSL certificate, and emails you 30, 7 and 1 day before anything expires. It works with any registrar. The SSL checker, DNS lookup and WHOIS pages work without an account, and the free plan tracks 5 domains. I'd love feedback on two things: what else breaks silently for you (DNS changes, CAA records, nameservers?), and would you want Slack/webhook alerts before email?
Thank you everyone for the thoughtful questions and feedback on TLDix! Addressing the points raised: @Şiwei Chen — DNS record and nameserver change detection is definitely high on our roadmap, as silent DNS edits can take down services even when renewals are current. Webhook notifications are also supported on paid tiers. @Tal Aizikov & @yönetici-132 & @destek-370 — The free plan includes 20 domains forever with no card required, alerting at 30, 7 and 1 day before expiry. For agency/multi-client workflows, CSV bulk management and API access are available on paid plans, and granular per-domain routing / client grouping is actively in progress for team features. @Alexander Burnett — For ccTLDs like .de that omit expiry dates from public WHOIS, TLDix allows you to set or edit the renewal date manually (or track it as a custom renewal), while still monitoring the SSL certificate and firing the 30/7/1-day alerts automatically. @sedrick nostrant — Best of luck with your launch this week! Tracking actual registrar renewal prices to catch unexpected price spikes is a fantastic suggestion and would turn TLDix into a cost-saving tool on top of a safety net. I've noted this for the roadmap.
Answering your question: nameserver and DNS record changes are the ones that bite me silently, more than expiry. A domain can be renewed and still break because someone edited an A or MX record at the registrar. A daily diff of the DNS records with an alert on change would be worth paying for. Webhook alerts before email would be my vote too.
The 30/7/1-day alert cadence is a nice touch, since a single reminder is easy to miss when it lands in a shared inbox. Pulling WHOIS expiry and the SSL cert automatically when you add a domain also saves the tedious part of tracking renewals across registrars. Do the alerts go to multiple recipients on the free plan, or is that a team-plan feature?
Pulling the WHOIS expiry and the SSL certificate in automatically is the part I'd actually use, because a renewals spreadsheet is always out of date. Some registries don't show an expiry date in public WHOIS (.de is one), so for those can you type the renewal date in by hand and still get the 30, 7 and 1 day emails?
Helping launch a product this week, so the 30/7/1 cadence resonates — a single reminder is too easy to miss when it lands in a busy inbox. One thing I'd want to know: do the alerts include the actual renewal price? Auto-renew at an inflated renewal rate is its own trap, and putting the price in the alert would turn this from a reminder tool into a cost-saving tool. The free WHOIS/SSL lookup tools are a smart wedge, too — they pull in traffic and the alerts keep people.

Hi Fazier! I built TLDix after losing track of renewals across several registrars and hosting accounts. You add a domain, it reads WHOIS and the SSL certificate, and emails you 30, 7 and 1 day before anything expires. It works with any registrar. The SSL checker, DNS lookup and WHOIS pages work without an account, and the free plan tracks 5 domains. I'd love feedback on two things: what else breaks silently for you (DNS changes, CAA records, nameservers?), and would you want Slack/webhook alerts before email?
Thank you everyone for the thoughtful questions and feedback on TLDix! Addressing the points raised: @Şiwei Chen — DNS record and nameserver change detection is definitely high on our roadmap, as silent DNS edits can take down services even when renewals are current. Webhook notifications are also supported on paid tiers. @Tal Aizikov & @yönetici-132 & @destek-370 — The free plan includes 20 domains forever with no card required, alerting at 30, 7 and 1 day before expiry. For agency/multi-client workflows, CSV bulk management and API access are available on paid plans, and granular per-domain routing / client grouping is actively in progress for team features. @Alexander Burnett — For ccTLDs like .de that omit expiry dates from public WHOIS, TLDix allows you to set or edit the renewal date manually (or track it as a custom renewal), while still monitoring the SSL certificate and firing the 30/7/1-day alerts automatically. @sedrick nostrant — Best of luck with your launch this week! Tracking actual registrar renewal prices to catch unexpected price spikes is a fantastic suggestion and would turn TLDix into a cost-saving tool on top of a safety net. I've noted this for the roadmap.
Answering your question: nameserver and DNS record changes are the ones that bite me silently, more than expiry. A domain can be renewed and still break because someone edited an A or MX record at the registrar. A daily diff of the DNS records with an alert on change would be worth paying for. Webhook alerts before email would be my vote too.
The 30/7/1-day alert cadence is a nice touch, since a single reminder is easy to miss when it lands in a shared inbox. Pulling WHOIS expiry and the SSL cert automatically when you add a domain also saves the tedious part of tracking renewals across registrars. Do the alerts go to multiple recipients on the free plan, or is that a team-plan feature?
Pulling the WHOIS expiry and the SSL certificate in automatically is the part I'd actually use, because a renewals spreadsheet is always out of date. Some registries don't show an expiry date in public WHOIS (.de is one), so for those can you type the renewal date in by hand and still get the 30, 7 and 1 day emails?
Helping launch a product this week, so the 30/7/1 cadence resonates — a single reminder is too easy to miss when it lands in a busy inbox. One thing I'd want to know: do the alerts include the actual renewal price? Auto-renew at an inflated renewal rate is its own trap, and putting the price in the alert would turn this from a reminder tool into a cost-saving tool. The free WHOIS/SSL lookup tools are a smart wedge, too — they pull in traffic and the alerts keep people.
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