Browser tools
Inspect DMARC without handing over your data.
These focused tools run locally in your browser. They are useful for preparation and diagnosis, not a substitute for observing real aggregate reports over time.
DMARC record checker
Paste a DMARC TXT value and check its structure, required tags and common mistakes.
The record is checked only in your browser.Open tool →02DMARC record generator
Build a readable DMARC record for monitoring or a planned policy change.
The generated record stays in your browser.Open tool →03DMARC XML report viewer
Open an uncompressed aggregate XML report and see its reporters, sources, volume and alignment summary.
The file is parsed locally and is not uploaded.Open tool →04External authorisation builder
Construct and review the DNS name used to authorise an external aggregate-report destination.
Domains entered here are not submitted to DMARC Analyst.Open tool →05SPF and DKIM alignment explainer
Compare a visible From domain with Mail From and DKIM signing domains under relaxed or strict alignment.
The identifiers are compared only in your browser.Open tool →