Litmus

Skip the scattered docs and start with a clear build-to-send routine. Draft your message in the visual editor or paste your HTML, then tag reviewers and assign owners. Feedback lives on the specific section of the email—headlines, images, code blocks—so you can resolve threads without hunting through screenshots. Approvals are tracked, versions are preserved, and the Chrome extension lets you test emails you build anywhere without changing your workflow.

Before you queue a send, run a full preflight. Litmus automatically checks links, images, tracking parameters, alt text, character counts, and accessibility (contrast, structure, focus order). It verifies personalization and merge tags with sample data, flags missing fallbacks, and catches UTM errors. The subject line assistant scores tone and length, suggests alternatives, evaluates emoji usage, and confirms preview text formatting so your first impression lands in every inbox.

Validate rendering and deliverability in one pass. Generate instant previews across 90+ email clients and devices, including Outlook variants, Gmail, and iOS/Android, in both light and dark mode. Spot broken layouts, font quirks, and alignment issues before they reach subscribers. Run spam and blocklist tests, authenticate with SPF/DKIM/DMARC checks, and review inbox placement using seed tests. When something fails, you’ll get specific fixes—swap CSS, adjust images, or tweak copy—to prevent last‑minute surprises. more