Preview HTML emails across real clients before launch

MailSlurp helps teams test HTML email templates across Gmail, Outlook, Yahoo, iPhone, Android, and desktop clients so layout, image, and CTA defects are caught before customers receive them.

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HTML email previews across major client families

Use MailSlurp to compare Outlook, Gmail, Yahoo, Apple Mail, iOS, iPadOS, Android, and browser render targets before customers receive the message.

Outlook.com
Outlook Classic
New Outlook
Gmail Web
Gmail Android
Yahoo
Apple Mail
iOS and iPadOS

Client and device previews

Preview delivered emails before customers see them

Review each message across supported email clients and configured render targets, compare results, and inspect the source HTML from one dashboard before a campaign reaches production.

Check on every client

Device preview screenshots shown across supported clients and device contexts

Test across devices

Test email rendering across supported mobile, desktop, webmail, and native-app contexts. Find layout, image, spacing, and CTA visibility issues before launch.

Email previews compared across light mode, dark mode, and desktop clients

Fix issues fast

Use configured target sets to compare important client contexts, catch contrast and spacing regressions, and review the same email your app or ESP produced.

Apple Mail

iPadOS Mail

Outlook iOS

Gmail Android

Outlook Android

Outlook Classic

New Outlook

Gmail Web

Outlook Web

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Preview HTML emails before customers receive them

Use MailSlurp to review real client previews, compare rendering differences, and keep evidence with each launch or release.

Preview HTML email templates in real clients

Review markup, tables, images, buttons, spacing, preheaders, and responsive sections in actual mailbox-client contexts.

Run HTML previews

Check Gmail, Outlook, Yahoo, iPhone, and Android

Use one preview run for common mailbox and device targets so visual defects are easier to compare and fix.

See preview targets

Find template issues before campaign send

Catch broken images, clipped sections, malformed CTAs, and rendering differences before launch.

See email audit

Pair rendering checks with inbox placement

Confirm that important emails both arrive in the right place and display correctly for the mailbox clients that matter.

See inbox placement

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