Certificate image generator
One URL per graduate: name, course, date and issuer are passed as parameters — issue unlimited personalised certificates without generating files in advance.
Example URL
https://api.opengraphapi.com/v1/card?template=certificate&title=Jane%20Doe&subtitle=Advanced%20SEO%20Masterclass&meta=Sep%202026&brand=Lumen%20Academy&bg=forest
Parameters
| Parameter | Role in this template |
|---|---|
title | title(name) |
subtitle | subtitle(course) |
meta | meta(date) |
brand | brand(issuer) |
bg | Content field |
bg | Theme: midnight, sunset, forest, royal, slate, ocean, mono, rose, amber, paper |
api_key | Removes watermark, raises quota |
Typical uses
- Course completion (Teachable, Thinkific)
- Workshop badges
- Employee awards