Tools
Free tools
Small, focused utilities for the fiddly parts of building and shipping. No account, no setup. Open one and start.
Email authentication
DMARC policy generator
Compose a DMARC record one choice at a time, or paste one you already have and read it back in plain English. The two stay in sync both ways.
Email authentication
DMARC report analyzer
Paste one of the XML aggregate reports your receivers email you and read it back in plain English: who’s sending as your domain, what’s passing, and what to fix.
Email authentication
BIMI record generator
Build the DNS record that shows your logo next to your email, or paste one you already have and read it back in plain English. The two stay in sync both ways.
Email authentication
DKIM key generator
Generate an RSA key pair and its DNS record right in your browser, or paste a record you already have and read it back in plain English. The private key never leaves your browser.
DNS records
DNS record splitter
Paste a DKIM key or any TXT record over 255 characters and get it back as correctly quoted, correctly spaced strings, formatted for Cloudflare, Route 53, Azure, or a zone file.
Email diagnostics
Email header analyzer
Paste a raw email and read its headers back in plain language: the SPF, DKIM and DMARC verdicts, and every relay hop with the time it took.
Messaging
SMS segment calculator
Type a message and see how it breaks into billable segments, whether it’s GSM-7 or UCS-2, and what smart encoding can convert to keep it short.