WoollyPix · Smart Slice

Smart Slice - 9-Grid Photo Slicer & AI OpenCV Object Extractor

WoollyPix Smart Slice supports standard 9-grid image splitting for social feeds (WeChat, Instagram, Xiaohongshu), custom guides dragging, and embedded local OpenCV.js computer vision to auto-detect and crop multiple separate objects in batch.

Loading Smart Slicer (Local Compute · Zero Upload)
Smart Slice Guide

Smart Slice

9-Grid Photo Slicer & AI OpenCV Object Extractor

Three Core Slicing Engines

From social feeds to manga and object detection, crop effortlessly

1

Social Grid Presets

Presets for 3x3 grids, 4-grids, and 6-grids optimized for WeChat Moments and Instagram.

2

Flexible Cutlines

Freely add horizontal and vertical split lines with magnetic alignment and ruler snapping.

3

OpenCV AI Object Slicing

Leverages WebAssembly-based OpenCV to automatically detect contours of individual objects and crop in batches.

FAQ

Click to expand FAQs and technical specifications

Q1.What grid slicing modes are supported?
Supports even grids (3x3 nine-grid, 2x2, 4x4), draggable custom split lines, and OpenCV.js AI object contour detection to automatically separate subjects.
Q2.Do cut slices lose quality?
No. All slicing is calculated from original natural dimensions. You can export lossless PNG or high-quality JPG directly inside a ZIP archive.
Q3.Is image slicing secure? Does it leak data?
100% private. Image decoding, line detection, OpenCV computation, and ZIP generation run entirely in your local browser sandbox without server uploads.
Q4.Any tips for posting nine-grid images on social feeds?
Select a 3x3 even grid, download the ZIP, and upload images 1 through 9 in sequence on WeChat Moments or Instagram to form a stunning panoramic grid.

Explore More Free Local Tools

Woolly Collage → Long Stitch → Screenshot Beautifier → Blog →