Test your HTML emails like a pro.

Self-hosted email testing platform. Preview across viewports, simulate email clients, validate against sending platforms, and keep your data on your own VPS.

Multi-viewport previews

Desktop, tablet, mobile and custom widths.

Client simulation

Gmail, Outlook, Apple Mail, Samsung, Thunderbird.

Privacy first

Encrypted at rest, retention controls, self-hosted.

Share results

Public share links with expiration (optional).