Smart Image Toolkit

Content-aware resize, grid/tile splitting, and AI background removal — all running locally in your browser.

Your images never leave your device. All processing happens locally in your browser — resize, split, and background removal all run on your own hardware.

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About this tool

The Smart Image Toolkit bundles three privacy-friendly image utilities. Everything runs in your browser; nothing is uploaded.

Resize

Content-aware (seam carving) resize that keeps subjects intact when changing aspect ratios. Brush over faces, logos, or text to protect them. Crop and pad modes are also available for quick fixed-size output.

Split

Cut an image into a grid of equal panels (perfect for an Instagram 3×3 feed grid or a swipeable 3-panel carousel), or tile it into fixed-size chunks. Each tile is exported individually and a single zip download is provided for convenience.

Background removal

Uses an ONNX segmentation model (ISNet) running on WebAssembly with optional WebGPU acceleration. The model weights are fetched once on first use and then cached by the browser. Output can be saved with a transparent background (PNG/WebP) or composited onto a solid color (any format).

Limitations

Maximum source file size is 10 MB. Supported formats: JPEG, PNG, WebP. For very large resizes, seam carving is preceded by a downscale step to avoid distortion and keep the operation responsive. Background removal speed scales with image dimensions; downscale very large photos first for the fastest results.