WordPress Featured Image: The Complete Setup Guide
A complete guide to WordPress featured images. Learn the optimal size, how to set and display them, and best practices for using featured images to improve SEO.
WordPress featured images (also called post thumbnails) are crucial for your blog's appearance and SEO. This guide covers everything about WordPress featured images in 2026.
WordPress Featured Image Size
The optimal WordPress featured image size is 1200 × 628 pixels for social sharing. For the blog index page, WordPress resizes images based on your theme settings. Enable image sizes in Settings > Media: thumbnail (150×150), medium (300×300), large (1024×1024).
How to Set a Featured Image in WordPress
In the post editor (both Classic and Gutenberg), find the 'Featured Image' panel in the right sidebar. Click 'Set featured image', upload or select from media library, and click 'Set featured image' to confirm.
WordPress SEO for Featured Images
Always fill in: Alt Text (use focus keyword), Title (descriptive), Caption (optional). These fields help with image search SEO and accessibility. Plugins like Yoast SEO use featured images for Open Graph meta tags automatically.
Featured Image Plugins for WordPress
Featured Image from URL: use external images as featured images. Auto Featured Image Generator: automatically creates featured images from post content. Advanced Custom Fields: add multiple featured image variants.
Performance Tip
Compress your featured images before uploading. Use WebP format (WordPress 5.8+ supports it). A plugin like Smush or ShortPixel can automatically optimize images on upload, improving Core Web Vitals scores.
Conclusion
Generate professional WordPress featured images with Instant Thumbnail. Download as PNG, compress it, and upload to WordPress. Your posts will look great everywhere they appear.
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