SplitX is a free online tool that splits images into grids for Instagram and Twitter. It creates 3x3 grids, seamless carousels, and Twitter banner layouts. All processing happens in your browser for complete privacy.

Is SplitX free to use?

Yes, SplitX is completely free. No credit card required, no hidden fees, and no watermarks on your images.

Do I need to create an account?

No account or signup is required. You can start splitting images immediately.

Yes, 100% private. All image processing happens locally in your browser. Your images are never uploaded to any server.

What image formats are supported?

SplitX supports JPG, PNG, and WebP formats. Output images are provided as high-quality PNG files.

How do I make a grid post on Twitter/X?

Split a wide image into 4 equal parts (2x2 grid), then attach all 4 images to a single tweet. Twitter will arrange them in a 2x2 layout. Use SplitX to split the image — it takes about 2 seconds.

What size should a Twitter grid image be?

Each image in a Twitter 2x2 grid should be 1200x1200 pixels. Your source image should be 2400x2400 pixels total. This gives you high-resolution slices that survive Twitter's compression.

← Twitter Image Sizes Vertical Photo Guide →

How to Make a Twitter/X Grid Post

Updated March 28, 2026

A 2×2 grid post on Twitter takes up way more screen space than a single image. On mobile, it fills roughly 40% of the viewport vs maybe 15% for a standard photo. That's not a small difference when you're competing for attention in a fast-moving timeline.

Here's how to make one.

Step 1: Pick the Right Image

Wide images work best. Landscapes, digital art, before/after comparisons, product showcases. Your source should ideally be square (1:1 ratio) at 2400×2400px. If it's not square, crop or pad it first.

One thing to watch: don't put a face or key text right on the center crosshair. That's where the grid lines fall, and it'll look weird split in half.

Step 2: Split Into 4

Use SplitX (free, browser-based) or any image editor:

SplitX: Upload, select 2×2, download ZIP. 2 seconds.
Photoshop: Slice tool, 2 rows × 2 columns. Export as individual files.
Canva: Grid template, download as separate images. (Free tier has limitations)

Each slice should come out at 1200×1200px. That's the resolution Twitter prefers for square images.

Step 3: Upload to Twitter in the Right Order

This is where most people mess up. Twitter's image ordering is... unpredictable. Here's what works:

Select all 4 images at once from your file picker
Check the preview in the compose box — Twitter usually orders them left-to-right, top-to-bottom
If the order is wrong, deselect all, then re-select one by one in the correct sequence

The images should be numbered: 1 (top-left), 2 (top-right), 3 (bottom-left), 4 (bottom-right). Most splitter tools number them this way.

Step 4: Post

Add your text, hit post. The grid will display as a 2×2 layout in the timeline and as 4 tappable images when someone opens the tweet.

Why 2×2 Beats a Single Image

Beyond the screen real estate argument, grid posts trigger curiosity. People tap to see the full image, which counts as engagement in Twitter's algorithm. More engagement → more impressions → more reach. It's a simple feedback loop.

Art accounts on Twitter have been using this format for years. It works. The only barrier was the splitting step, and tools like SplitX have removed that entirely.

Common Mistakes

Wrong aspect ratio: If your source isn't square, the grid won't align properly
Low resolution: Below 1200px per slice looks blurry on mobile
Wrong upload order: Always check the preview before posting
Splitting through text or faces: Adjust your crop to avoid the center lines

Ready to try? Open SplitX and create your first Twitter grid.