Tired of your emails breaking in Outlook and on mobile devices? We have the solution.
A simple and accessible tool to validate and clean your HTML code, guaranteeing that your emails look perfect on all clients.
No spam, ever. We'll only send you relevant updates.
How does it work?
Without CSSure
With CSSure
* Illustrative images showing the difference CSSure can make
Simply paste your HTML code on the left... and receive your validated code report.
Why choose CSSure?
Save time
Automatically detect and fix HTML errors, reducing hours of manual debugging.
Perfect design on all devices
Ensure your emails look amazing on mobile, tablet, and desktop.
Simple and accessible
Intuitive interface that doesn't require advanced technical knowledge.
Guaranteed compatibility
Automatically test against Outlook, Gmail, Apple Mail, and more.
Who we are
Gastón Arévalo
With more than 8 years of experience in software development and a deep specialization in product architecture, Gastón is the technical brain of CSSure. His extensive experience in the industry has given him the necessary vision to build a robust and scalable tool that not only solves the current problem, also is ready for the future.
Joaquín Luna
As a software developer with a passion for design, Joaquín focuses on translating technical complexity into a fluid and intuitive user experience. His mission is to ensure that CSSure not only works flawlessly but is also incredibly easy and enjoyable to use. His agile approach and knack for combining aesthetics with functionality are key to bringing the product vision to life.
Join the Waitlist for Exclusive Early Access
By joining our waitlist, you secure 100% lifetime discount on our validation service
CSSure is currently in development. By joining our waitlist, not only do you secure this exclusive benefit but also help us build the perfect product for your needs.
No spam, ever. We'll only send you relevant updates.