# Blog

> Notes from the team building Bannerify: image generation, rendering engines, and automation guides.

Canonical: https://bannerify.co/blog
Last updated: 2026-10-28

- [Open Graph tags: og:type, og:title, og:url, and the rest](https://bannerify.co/blog/open-graph-tags) - 2026-10-28. What Open Graph is, every og tag with an example (og:title, og:type, og:url, og:image, og:site_name), the og:type values, and how to test them.
- [What is an AVIF file? How to open and convert it](https://bannerify.co/blog/avif-file) - 2026-10-17. AVIF is a modern image format with small files. What an AVIF file is, why websites save images as AVIF, how to open one, and how to convert it to JPG or PNG.
- [Canva Bulk Create: how to use it, limits, and fixes](https://bannerify.co/blog/canva-bulk-create) - 2026-10-17. Where to find Bulk Create in Canva, how to use a CSV or a Canva Sheet, the 300-row limit, why image links fail, and how to bulk create without Canva Pro.
- [OG image size, meta tags, and examples](https://bannerify.co/blog/og-image) - 2026-10-15. What an OG image is, the 1200 × 630 size, the meta tags to copy, how Facebook, LinkedIn, and X show it, and how to make one for every page.
- [Certificate of completion: sample and template](https://bannerify.co/blog/certificate-of-completion) - 2026-10-13. What a certificate of completion should include, sample wording for courses and training, the print size, and how to make one for every person on a list.
- [Dynamic invoice PDFs from JSON in PHP](https://bannerify.co/blog/dynamic-invoice-pdf-php) - 2026-10-08. Design the invoice once, then generate every copy from your billing data. PHP examples for tables from JSON, QR payment codes, and hosted PDF links.
- [Generate dynamic images in PHP with an API](https://bannerify.co/blog/generate-images-php) - 2026-10-08. Design one template, then render banners, product images, and certificates from PHP. Works with plain cURL or the bannerify/bannerify SDK, no GD or Imagick.
- [Say hi to Bannerify](https://bannerify.co/blog/say-hi-to-bannerify) - 2024-11-22. Why I built Bannerify, an image generation API that renders a simple image in under a second, and its use cases: banners, social images, tables, and PDFs.