0Cert is a WordPress plugin designed to add identity-based cryptographic verification to WordPress sites without relying on traditional SSL certificates. By connecting the site to the 0Cert Key Generation Center (KGC), the plugin implements certificateless public key cryptography, binding a site's cryptographic identity directly to its domain. When a visitor accesses a site using the 0 Browser, they see a green 0Cert Verified badge, indicating that the site's identity is verified through cryptographic means rather than by a certificate authority.
The plugin automatically adds X-0Cert- headers to every page response, enabling verification without any server-level configuration or command line access. well-known/0cert, which the 0 Browser checks to display the verified badge. Site administrators manage the plugin through a settings page in the WordPress dashboard, where they can view the 0Cert status, key ID, and follow setup instructions. The setup process involves installing the plugin, generating keys via the 0Cert web app or iOS browser app, entering these keys into the plugin, and adding a DNS TXT record to the domain registrar.
0Cert is open-source and released under the MIT license. The project encompasses the full protocol, KGC server, iOS browser, npm middleware, and the WordPress plugin itself, all available on GitHub. The plugin is compatible with any WordPress hosting environment, including shared hosting, managed WordPress, and VPS, requiring no changes to server configuration. The tool is intended for WordPress site administrators seeking an alternative to traditional SSL certificate authorities through identity-based cryptographic verification.
0Cert is a Security & compliance platforms product. It focuses on managing SSL certificates and renewals for WordPress sites, reducing reliance on traditional certificate authorities. It is built as a B2B product for wordPress site owners seeking alternative encryption solutions. The product is available for free. 0Cert is available on the web.
It is developed by Dimitrii Ulianov, and the product first shipped in 2026. Development happens publicly on GitHub with 3 commits in the last 90 days. PulseGate's similarity index finds few close equivalents — 0Cert occupies a relatively distinct niche. Key capabilities include identity-based encryption, Certificateless PKC, and verification headers. The interface is available in English and Gujarati.
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