Your device
Domain Watchlist
Every lookup you run is remembered in this browser so the next check can show what moved. This is that history — the domains you have checked, which of them changed, and a one-click re-run for each.
Tracked domains
Reading this browser’s history…
How the watchlist fills itself
Three steps, none of which you have to do by hand
Run any check
Look up SPF, DMARC, an SSL certificate, security headers — anything from the list below. The domain lands here the moment the result renders.
The answer is fingerprinted
Only the values that matter to that check are kept — the policy string, the issuer, the expiry date — as a small baseline in this browser.
Come back and compare
Your next check for that domain is diffed against the baseline, and anything that moved is flagged here and on the tool page itself.
Checks that feed this page
28 tools record a baseline — run any of them to start tracking a domain
What this page stores
All of it in localStorage, on this device only
Kept in your browser
- The domain, host or IP you looked up
- The tool you ran and when you last ran it
- A short summary of the answer — policy strings, record values, expiry dates
Never stored
- Nothing leaves this browser — there is no account and no server copy
- No credentials: /smtp-test and other password-taking tools never write here
- No history across devices or profiles, and none after you clear site data
Questions about the watchlist
How the local history behaves
Do I need an account for this?
No. The watchlist is built from data your browser already stores locally when you run a check. That also means it does not follow you to another device or another browser.
How long is a domain kept?
Entries age out on their own so the store stays small, and the oldest go first once it fills up. Pin a domain to keep it at the top of this list — a pinned domain stays visible even after its stored baseline expires.
What counts as a change?
A field in the stored summary having a different value than last time — a new DMARC policy, a re-issued certificate, an added MX host. Changes from the last 30 days are highlighted; older ones stay in the history without keeping the domain flagged.
Can I stop tracking a domain?
Remove a single domain with the bin icon on its card, or use "Clear watchlist" to forget everything on this device. Either way the next check for that domain starts from a fresh baseline.
This list is stored in this browser only — nothing is uploaded, and it is not shared between your devices. Clearing your browser data clears it too.