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Email Thumbnail Image Resizer
Easily resize your images to 400 × 300 pixels
Upload your image
Drag and drop your image or click to browse
JPG, PNG, WebP, or GIF up to 5MB
Settings
Dimensions
Aspect ratio: 1.33:1
Compression Quality
85%Balanced quality and file size
Middle Advertisement (336×280 or 300×250)
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About Email Thumbnail
Email thumbnail images should be 400 x 300 pixels (4:3 aspect ratio) for inline content. Thumbnails improve email engagement. Use our tool to resize images for email marketing campaigns.
Frequently Asked Questions
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