Calendar link generator
Generate links to add an event to popular calendar services.
Mailto link generator
Create links with subject, body, cc, and bcc.
EML viewer
View the email hidden inside any EML file.
Scroll my email
Create a scrolling GIF of your email.
Email ipsum generator
Generate lorem ipsum for your email designs.
Video thumbnail generator
Email-ready thumbnails for YouTube, Vimeo, Wistia, and Loom videos.
Placeholder image generator
Generate placeholder images with custom text, colors, and fonts.
Carbon footprint calculator
Calculate the size of your email and the carbon emissions it will produce.
Can I send this image / font?
aka "What's CORSing you problems?"
What does it paste?
See what's really in your clipboard and get clean HTML.
Examine email
Discover which tools were used to send your favorite emails!
Startup program
If your company has raised less than $10 million in funding, you may be eligible for one free year of messaging and data integration with Customer.io.
Unlock your email potential
Take your email skills to the next level with these curated guides, tips, and strategies. From coding basics to advanced personalization, explore resources to refine your campaigns and boost results.
Intermediate and advanced Liquid guide
Transform data into personalized messages.
Master email deliverability
Ensure your emails reach the inbox.
How to HTML guide
Craft HTML emails that work.
Email-ready video thumbnails
Add video vibes to your emails.
"Add-to-calendar" links for email
Boost attendance with calendar links.
The State of Messaging Report 2024
Insights to elevate your email strategy.
Supercharge your messaging automation
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