Welcome to Underwriters Laboratories

UL is the trusted source across the globe for product compliance.

Benefiting a range of customers - from manufacturers and retailers to consumers and regulating bodies - we've tested products for public safety for more than a century.

Under Construction

UL.com is currently under construction. We are redesigning our Web site to bring an enhanced online experience to the various user segments we collaborate with and support. Look for us shortly as we continue to uphold the standard in safety compliance and commitment to public service.