Resize images for blog headers — WordPress 1200×628, Medium 800×418, Ghost 1200×630. Free online tool, no upload required.
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All recommended Blog Header image dimensions for 2026. Upload at these exact sizes to avoid any quality loss from platform-side scaling.
| Type | Width × Height | Aspect Ratio | Notes |
|---|---|---|---|
| WordPress Featured | 1200 × 628 px | 300:157 | Standard featured image and OG preview |
| Medium Header | 800 × 418 px | 400:209 | Medium.com article header |
| Ghost Featured | 1200 × 630 px | 40:21 | Ghost CMS featured image |
Open ResizePack, drop your image and select the Blog Header preset — WordPress, Medium, or Ghost.
Blog headers also serve as Open Graph images when shared on social media. Make sure the key visual content is centered — Facebook and Twitter crop the edges slightly on different devices.
Download and upload to your CMS. For WordPress, set as Featured Image in the post editor. For Medium, add as the first image in your draft. For Ghost, use the Feature Image field in post settings.
Ready to resize?
Use Batch Resize for batch resizing with social media presets, or Crop & Ratio to crop to the exact aspect ratio first.
1200×628 px is the standard for WordPress featured images. This size works well as both the blog header and the Open Graph image when shared on Facebook (which uses 1.91:1 ratio). Many themes also display this size on archive and category pages.
Medium displays header images at 800 px wide with a height around 418 px (roughly 1.91:1). However, Medium crops differently on mobile vs desktop. Keep important content centered and avoid text in the image that might get cut off.
Indirectly, yes. A well-sized featured image becomes your Open Graph preview on social media, driving click-through rates. It also appears in Google Discover and image search. Add descriptive alt text and compress to under 200 KB for fast loading.
Yes — most CMS platforms use the featured image as the Open Graph image by default. Size it at 1200×628 px (WordPress) or 1200×630 px (Ghost) and it works perfectly for both the blog post and social media previews.
Resize to the exact dimensions your theme displays (usually 1200 px wide), compress to 100-200 KB with SammaPix, and use WebP format if your CMS supports it. This combination keeps your blog's Largest Contentful Paint (LCP) score fast.
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All resizing happens entirely in your browser. Your images never leave your device.
Batch process
Resize multiple images at once with the same settings. Download all as ZIP in seconds.
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Need dimensions for every platform in one place? Read our complete 2026 cheat sheet- every network, every format, updated for this year.
Social Media Image Sizes 2026