Image Splitter Tutorial
Detailed guide, best practices, and FAQ
Use Cases
The Image Splitter is useful for 朋友圈 9-grid, Instagram triptych, Weibo 9-grid, Discord/Reddit collage, and any social media scenario requiring grid publishing. Slice a large image into equal parts and post in order for a grid effect.
Features
- Multiple grids: 1×1, 2×2 (4-grid), 3×3 (9-grid), 1×3 (Instagram triptych), 3×1, 2×3, 3×2
- Local processing: all slicing via Canvas API in the browser; image never uploaded
- Preview grid: slices shown in row/col order matching posting sequence
- One-click ZIP: bundle all slices into a zip file with numbered names
- Individual download: click any slice to save as PNG
Examples
Example 1: Scenario 1: 朋友圈 9-grid — upload a landscape, choose 3×3, post slices 1-9 in order.
Example 2: Scenario 2: Instagram triptych — upload a wide image, choose 1×3, post slices in order to form a complete long image.
Example 3: Scenario 3: Comparison collage — choose 3×1, stack three comparison images vertically.
Best Practices
- Square images work best with 3×3 (朋友圈)
- Wide images use 1×3 for Instagram horizontal triptych
- Tall images use 3×1 for TikTok/Xiaohongshu vertical triptych
- Crop the image to the target aspect ratio before splitting to avoid stretching
FAQ
Why are there gaps between slices?
If the original dimensions are not divisible by the grid, up to 1 pixel may be discarded per slice — usually invisible.
Does it support transparent PNG?
Yes. Transparency is preserved; output is PNG format.
Will large images lag?
Images up to 5000×5000 are smooth in browsers. For larger ones, compress first with the Image Compressor.