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Developer automates blog cover images using headless Chrome and CSS templates

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A developer has built a workflow that generates branded 1000x420 blog cover images automatically, without using any design tool. The system uses headless Chrome's built-in screenshot command to capture a styled HTML card, producing an exact-dimension PNG in about one second. A Python script fills placeholders in an HTML template with the post title, a kicker, and an accent color, then calls Chrome from the command line to render the image. The font size adjusts dynamically based on title length to prevent overflow, and all output is version-controlled in Git, making it easy to regenerate covers in CI pipelines. The author notes the approach eliminates repetitive manual design work for anyone publishing content on a regular schedule.

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