Check your messaging and DNS records before you ship to production.
Generate authentication keys, inspect raw email headers, preview interactive WhatsApp templates, and calculate SMS segments directly in your browser.
Email authentication
DMARC policy generator
Configure a DMARC policy that protects your domain from spoofing, or paste an existing DNS record to review its enforcement rules in plain English.
Email authentication
DMARC report analyzer
Upload an XML aggregate report from your mailbox providers to see which servers send as your domain, what passes authentication, and what to fix.
Email authentication
BIMI record generator
Create and validate the DNS record that displays your brand logo in supporting inboxes, or paste an existing record to verify its settings.
Email authentication
DKIM key generator
Generate an RSA key pair and its public DNS record locally in your browser, or paste an existing DKIM record to inspect its configuration.
DNS records
DNS record splitter
Split long DKIM keys and TXT records into quoted 255-character strings formatted for Cloudflare, Route 53, Azure, or a zone file.
Email diagnostics
Email header analyzer
Paste raw email source to inspect SPF, DKIM, and DMARC verdicts alongside hop-by-hop delivery delays.
Messaging
WhatsApp message builder
Design interactive WhatsApp messages with buttons, lists, and media, preview how they look on a phone, and copy the ready-to-send request.
Messaging
SMS segment calculator
Paste your SMS copy to see its character encoding, billable segment count, and which characters smart encoding can replace to keep messages short.
Put it into practice.
Continue with the documentation, guides and examples for this topic.