Compare DNS changes against a saved snapshot

How to use this tool

Enter a domain, run a lookup and save a baseline. On a later check, the tool compares record groups with that baseline and shows changes. You can export a snapshot as JSON or import a previously saved snapshot for the same domain.

Reading the results

Baselines are stored in your browser, not in a monitoring service. Checks run only when you request them; there are no background alerts. Incomplete lookups cannot replace a baseline. DNS caches and rotating answers can produce differences without a configuration edit, and a TTL change alone does not change the record’s value.