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Free Email Marketing Tool
Paste your email HTML and see it exactly as subscribers will: desktop and mobile widths, images blocked like Outlook, and a dark-mode canvas. Plus pre-send checks that catch Gmail clipping before it costs you clicks.
A silent SPF or DKIM change can quietly send your emails to spam for weeks before anyone notices. Drop your email and we'll alert you the moment something looks off, so you fix it in minutes, not after a deliverability cliff.
Check every aspect of your email infrastructure
Mailsoftly handles SPF, DKIM & DMARC automatically. Campaigns, automation, and analytics in one place.
Free to start with your Google Workspace account. No credit card required.
This free email HTML preview renders your pasted email code the way inboxes actually display it: at 650px desktop and 375px mobile widths, with images blocked the way Outlook does by default, and on a dark canvas to catch dark mode problems. It also runs six pre-send checks, including the Gmail 102 KB clipping limit, missing image alt text, script tags that clients strip, over wide layouts and a missing unsubscribe link. Your HTML never leaves your browser.
Gmail truncates any message whose HTML exceeds 102 KB and replaces the rest with a View entire message link, which hides your content and often your unsubscribe link. Heavy markup from drag and drop editors and ESP tracking code are the usual causes. Keep the HTML comfortably under the limit, around 80 KB is a safe target, and paste your code into the preview above to get an exact size reading before you send.
