Free tools
No signup. Instant result. Browser tools stay on this device. DNS lookups send only the domain or IP you type.
Free tool
Free DMARC record builder
Choose a policy and report address, then copy a _dmarc TXT record. The builder runs in this tab.
MX / SPF / DMARC lookup →Free tool
Free email and PDF redaction tool
Automatically redact names, emails, phone numbers and other personal data from one email or PDF in your browser. No signup, nothing uploaded. Double-click a word to redact or restore every match.
Redact in bulk with Hexamail Flow →Free tool
Free email DNS lookup
Look up MX, SPF, DMARC, BIMI, MTA-STS and IP blacklists for one domain or address. Only the name or IP you type is sent.
See all free tools →Free tool
Free email header decoder
Paste raw email headers to unfold wrapped lines and decode encoded names and subjects. Nothing is uploaded.
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Free email Received-path tracer
Paste email headers to see each Received hop, the sending host, and how long the message sat between servers. Nothing is uploaded.
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Free EML viewer and converter
Open one .eml file in your browser. Read headers, plain text and HTML, then download .txt or .html. Nothing is uploaded.
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Free quoted-printable and Base64 decoder
Decode a quoted-printable or Base64 email body part in your browser. No signup, nothing uploaded.
See all free tools →Free tool
Free SPF record builder
Tick how your domain sends mail and copy a v=spf1 record. The builder runs in this tab.
MX / SPF / DMARC lookup →