Email HTML Spam Checker
Check spam triggers, preview on 22+ real devices, and fix compatibility issues-all in 30 seconds. Never send a broken or blocked email again.
Send your email here to start the test:
Try Sample Emails
Comprehensive Email Analysis
Spam Detection
Identify spam triggers in subject lines, content, HTML structure, and sender reputation factors that affect deliverability.
Client Compatibility
Test rendering across Gmail, Outlook, Apple Mail, and 22+ email clients on desktop and mobile devices.
Instant Results
Get real-time analysis with detailed reports on issues, warnings, and recommendations for better email performance.
Gmail
Apple Mail
Outlook
Yahoo Mail
GMX
22+
Real devices
Frequently Asked Questions
How do I test my email?
Three ways: upload your HTML file, paste the code directly, or forward your email to our unique test address. We'll analyze spam triggers, check compatibility across 22+ clients, and generate real device previews.
What does the spam check analyze?
We check subject lines for spam words, content patterns, HTML structure, image-to-text ratio, link safety, CAN-SPAM compliance, and deliverability signals that affect inbox placement.
Which email clients do you test?
Gmail, Outlook (desktop & web), Apple Mail, Yahoo, Samsung Mail, and 17+ more clients across iOS, Android, Windows, and macOS—covering 95%+ of the market.
How does the 'Send Email' test work?
We generate a unique address for you. Forward your email there, and we automatically extract the HTML and run the full test suite. Great for testing emails directly from your ESP.
Can I test emails from Klaviyo, Mailchimp, or other ESPs?
Yes. Either export your template as HTML and upload it, or use the Send Email feature to forward a test send directly from your ESP.
Is there an API for automated testing?
Yes. Our API lets you integrate email testing into your CI/CD pipeline or build custom workflows. Check the API docs for endpoints and examples.