Free tools to improve your email marketing
Use our free AI-powered tools to test subject lines, check spam scores, validate HTML emails, and more — no account required.
Everything you need to send better emails
Each tool is completely free to use. No sign-up, no credit card, no limits on basic features.
Email Subject Line Tester
Analyze your email subject lines with AI. Get a score, spam check, emotional appeal rating, and actionable suggestions to boost open rates.
Spam Score Checker
Check if your email content will land in spam or the inbox. Get deliverability insights and fix common issues before sending.
Domain Blacklist Checker
Check if your domain or IP is listed on any DNS blacklist. Scan 30+ blacklists instantly and get delisting guidance.
Email Signature Generator
Create professional HTML email signatures in seconds. Choose from modern templates and customize with your brand colors.
HTML Email Validator
Validate your HTML email code for cross-client compatibility. Catch rendering issues in Outlook, Gmail, Apple Mail, and more.
Email Preview Tool
Preview how your emails look across different email clients and devices before you hit send. Desktop, mobile, and dark mode views.
Ready for the complete email marketing platform?
These free tools are just the beginning. Sign up for MailGreet to get AI-powered email writing, automation, analytics, and everything you need to grow.