ThumbAPI — Auto Featured Images

ThumbAPI for WordPress turns your post title into a production-ready featured image with a single click. No template design, no image editing, no extra steps in your publishing flow.

The plugin adds a panel to the post editor (both the block editor and the classic editor). When you click Generate featured image , the current post title is sent to your ThumbAPI account, the returned image is uploaded to the Media Library, and it is set as the post’s featured image automatically.

Features

• One-click featured image generation from the post title
• Block editor sidebar panel and classic editor meta-box integration
• Five output formats: Blog post (1200×630), YouTube (1280×720), Instagram (1080×1080), X (1200×675), LinkedIn (1200×627)
• Three image styles: faceless, with personal photo, with logo
• Generated images go through the standard WordPress Media Library — full thumbnail sizes are generated automatically
• No bundled scripts or styles loaded outside the post editor and the plugin’s own settings page

What you need

• A ThumbAPI account and an API key from app.thumbapi.dev
• For “With image” or “With logo” styles, upload your personal photo or logo once in your ThumbAPI dashboard

External services

This plugin sends data to ThumbAPI ( https://api.thumbapi.dev ), which is a paid third-party service operated by ThumbAPI. When you click Generate featured image , the plugin sends the post title, your selected format, and your selected image style to the ThumbAPI POST /v1/generate endpoint, authenticated with the API key you saved in the plugin settings. ThumbAPI returns a generated image which the plugin then stores in your WordPress Media Library.

• Service: ThumbAPI
• Endpoint: https://api.thumbapi.dev/v1/generate
• Data sent: post title, output format, image style, your API key (as x-api-key header)