How Laravel developers can generate course certificates using an HTML-to-image API

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A tutorial published on the Accreditly blog outlines a method for generating course completion certificates in Laravel without relying on DomPDF or a headless Chrome server. The approach involves designing a certificate as a Blade view, rendering it to an HTML string, and sending it to an external HTML-to-image API that processes the page through real Chromium and returns a hosted PNG. A CertificateService class handles the rendering and API call, accepting four dynamic values: the user's name, course title, completion date, and a deterministic verification code. The verification code is generated via a SHA-256 hash of the user ID, course ID, and app key, ensuring it is unique and non-guessable. To avoid slowing down user-facing requests, the guide recommends running the certificate generation inside a queued job and persisting the returned image URL to prevent redundant re-rendering.

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