Dynamic social cards: every post gets its own preview

You've probably noticed that when you share a link on social media, a preview card appears with an image, title, and description. That card is called an OG image (Open Graph image). Most sites use one generic image for every page. But if you can automatically generate a unique card for each blog post — with the actual title and category on it — every share becomes a mini billboard for that specific piece of content.

A link shared on LinkedIn with a generic preview blends into the feed. A link with a custom card showing the exact post title, category, and read time stands out. It signals effort and professionalism, and it gives potential readers enough context to decide whether to click. For content creators and portfolio builders, this is free marketing that runs every time someone shares your work. One setup, infinite returns.

Modern web frameworks can generate these preview images automatically using a template. You design the card layout once — background color, where the title goes, where the category label sits — and the framework generates a unique image for every page based on that template. When you publish a new blog post, the social card exists immediately with zero extra work. To check what your cards look like, paste your URL into a social card preview tool before sharing widely. Social platforms sometimes cache old images, so verify after making changes.

If you're publishing content you want people to share — blog posts, case studies, project pages — dynamic social cards are worth the one-time setup. If your site is purely internal or not meant for social sharing, skip it. The sweet spot is content-heavy sites where each page is meaningfully different and worth its own preview.