Free toolsSmall tools.
Small tools.
Useful head starts.
Plan a campaign, sharpen a message, or make sense of a rate. These browser-based tools are open to everyone, without an account.
Useful on their own.
Better with your judgment.
Email rate calculators
Understand replies, bounces, and clicks
Subject line workshop
Make a clearer first impression
Email signature builder
A clean, copyable sign-off
Email copy review
Check clarity before you send
DNS record builder
Draft SPF and DMARC records
SPF lookup
Read the published sender policy
DMARC lookup
Inspect a domain’s published policy
DKIM lookup
Find a selector’s public key or alias
CNAME lookup
Read a host’s current alias
Campaign planner
Turn an idea into a brief you can keep
Bring your own context.
Tell us what you are working on. Let’s find a useful next step.