Free Email Marketing & Deliverability Tools

Practical tools for anyone who sends email. Check your domain's authentication, catch spam triggers before you send, and sharpen your subject lines and preview text. No signup, no cost.

Domain & authentication

Set up and verify the DNS records that keep your emails out of the spam folder.

SPF Checker & Generator

Check your live SPF record for errors, or build a new one.

Check or build a record

DMARC Record Generator

Create a DMARC policy to protect your domain from spoofing and phishing.

Generate a policy

DMARC Checker

Test your domain's DMARC, SPF, and DKIM records in one place.

Test your domain

DKIM Checker & Generator

Look up your DKIM keys by selector, or generate a new key pair in your browser.

Check DKIM

Email Header Analyzer

Paste headers to see SPF, DKIM and DMARC results, alignment, and delivery delays.

Analyze headers

MX Lookup

List a domain's mail servers in priority order and spot records that break delivery.

Look up MX

MTA-STS Checker & Generator

Check your MTA-STS record, policy file and TLS-RPT, or generate them.

Check MTA-STS

BIMI Checker & Generator

Check your BIMI record, DMARC policy, SVG logo and certificate, or build a record.

Check BIMI

Email Deliverability Test

Paste a test email from your inbox and get a score out of 10 with what to fix.

Test an email

Content & deliverability

Improve what you send before you hit the send button.

Email Spam Checker

Analyze your email's headers and content for spam triggers before sending.

Check an email

Subject Line Tester

Score your subject lines for better open rates and deliverability.

Test a subject line

Email Preheader Generator

Write preview text and see it rendered at the widths Gmail, Outlook and Apple Mail cut at.

Write a preheader

Email Template Builder

Drag-and-drop editor that exports responsive, Outlook-safe HTML. No signup.

Build a template

Email Marketing Savings Calculator

See how much you'd save by replacing your monthly email marketing subscription with a one-time Broadcast license.

Calculate savings

Why we built these

We make Broadcast, self-hosted email marketing software, so deliverability is our day job. Most email problems trace back to the same few causes: missing SPF or DMARC records, content that trips spam filters, and subject lines that don't earn the open. These tools help you fix each one, whether or not you ever use Broadcast. Everything runs free, with no account required.

Own your email platform

Broadcast is self-hosted email marketing software. Pay once, own it forever, and take full control of your email infrastructure.

Learn More