Email preview tools let you see how your emails render before sending. Whether you need multi-device previews, email client testing, or team collaboration features, this guide covers the best options available.
EmailQA is our product. The comparisons below are based on public pricing and features, last verified June 2026; Litmus and Email on Acid re-checked September 2026; Mailtrap re-checked October 2026.
Free email preview and feedback tool focused on team collaboration. Import from 9 ESPs, share previews with anyone, collect pin-based feedback.
Mailtrap is an email delivery platform for developers and product teams, with two products under one account: Email API/SMTP for email sending and Email Sandbox for email testing.
The sandbox captures outgoing emails in a virtual inbox so you can inspect HTML, spam score, and headers without sending to real addresses. Device Previews turns a captured email into rendered screenshots across 100+ client and device configurations, in light and dark mode, so you can spot broken layouts without copying HTML into another tool. The Email API/SMTP side handles transactional delivery with tracking.
Enterprise email testing platform with previews across 100+ email clients, spam testing, and analytics.
Email on Acid (also written "emailonacid" or "EoA") is a pre-deployment QA platform owned by Sinch. It offers email client previews across 90+ clients, accessibility checks against WCAG, spam scoring, link validation, and a campaign precheck checklist. Popular with enterprise email teams who need compliance-grade QA before send.
Consider your primary use case: Do you need email client rendering tests (how it looks in Outlook vs Gmail)? Or do you need team feedback features? Most teams overestimate their need for client rendering and underestimate collaboration needs.
Free tools like EmailQA offer preview and feedback features without the enterprise price tag. Paid tools like Litmus add email client rendering across 100+ clients—useful for complex HTML emails but overkill for most teams.
Check if the tool integrates with your ESP (Mailchimp, Klaviyo, HubSpot, etc.). Direct import saves time vs downloading and uploading HTML files manually.
An email preview tool lets you see how your email will look before sending it. Basic tools show desktop/mobile views. Advanced tools show rendering across specific email clients like Outlook, Gmail, and Apple Mail.
Not necessarily. EmailQA gives you all Pro features free for 14 days, including preview, feedback, and approval workflows. You only need paid tools like Litmus if you specifically need email client rendering tests across 100+ clients.
EmailQA offers a free 14-day Pro trial with all features — multi-device preview, team feedback, approval workflows, and ESP integrations. No credit card required. After the trial, the free plan still covers core features.
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