The batch sizing problem
You have one hero image. You need a 16:9 YouTube thumbnail, a 4:5 LinkedIn portrait, a 9:16 TikTok story, and an OG card. Standard workflows force you to open an editor, resize, export, rename, and repeat for each platform.
Most tools that solve this lock batch resizing behind a paid tier, cap uploads at 10 MB, or queue your files through remote servers.
The "Blur-Extend" padding technique
When you need to fit a landscape photograph (e.g., 16:9) into a vertical frame (e.g., 9:16 for Stories) without cropping out crucial visual details, standard letterboxing with flat black or white bars can look unfinished or stark.
The modern solution is the "blur-extend" padding technique. Instead of solid bars, this method duplicates the source image, scales it to fill the entire target canvas, applies a heavy blur effect, and overlays the original image centered on top. This creates a cohesive, modern feel by matching the colors and tones of the background directly to the main subject.
Avoiding manual cropping with Focal Points
When converting a single master horizontal hero shot to vertical social sizes, a standard center-crop can cut out key visual details. If a person or product is positioned off-center, automated resizing often crops them out of the frame entirely.
To maintain visual integrity across all aspect ratios simultaneously, you need a workflow that supports interactive focal points. By setting a specific visual anchor, you guarantee that every generated size centers perfectly around your subject, whether the output is a 1:1 square or a 9:16 vertical crop.
A frictionless, 100% client-side solution
We built the OG / Social Smart Resizer to cut this loop down to one step.
The tool processes everything locally in your browser using the native Canvas API. You drag in a single master photo, set your focal point, and download a ZIP containing cropped WebP, PNG, or JPG assets for every major platform. No cloud uploads, no accounts, no file-size caps. Your images never leave your device.