Free tools
Free email deliverability tools.
No signup, no email required. Everything runs instantly and nothing you paste is stored.
Deliverability checker
Check any domain's SPF, DKIM, DMARC, and MX records in seconds.
Spam word checker
Scan a subject line and email body for spam-trigger phrases.
Warmup calculator
Get a day-by-day sending ramp schedule for a new or existing mailbox.
Email HTML checker
Check text-to-HTML ratio, images, links, and tracking pixels in an email.