Browser tool · local-first
Social Image Resizer
Make one image work across formats.
Upload once, set the focal point, and export the versions you need. Your image stays in this browser.
Crop workspace
Portrait postChoose an imageor drop a JPEG, PNG, or WebP here
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No account · no upload · no image history
Images are decoded, cropped, and exported locally. Platform layouts can change; these are practical format templates, not platform guarantees.
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Why these formats
The templates cover common portrait, square, vertical-video, and landscape publishing needs. YouTube recommends 16:9 for video thumbnails; X displays single-photo posts in a broad range of standard aspect ratios; LinkedIn has published 1200 × 627 as an optimal post image size.