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DNSChecker vs DNS Hero: catalog facts
DNSChecker	DNS Hero
Free Free to use in the browser.	Free Free and open source under GPL-3.0-only.
Web	Android
Shows results from many resolvers in different countries at once Covers a wide range of record types, including DNSSEC records	Displays common DNS record types Checks domain health
Shows what resolvers return but does not diagnose configuration errors	Uses the Zone Vision API by DNSimple
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.