Free tool · runs in your browser

Instagram Grid Splitter

Slice one image into seamless profile-grid tiles — sized for today’s 3:4 grid, framed by dragging and zooming rather than guessing, and downloaded as one ZIP numbered in the order you should actually post them. Processed entirely on your device.

Layout
Tiles

The grid went 3:4, and the old tutorials didn’t notice

For a decade, grid design meant squares. Then Instagram rolled its profile grid over to 3:4 portrait thumbnails, and every square-sliced banner on the platform quietly stopped lining up — the grid now crops square tiles to portrait, eating the seams. This splitter is built for the grid as it exists: the default slices to 3:4 (exported at 1080×1440, a size Instagram accepts natively), the preview shows the layout the way your profile renders it, and the classic square mode is preserved for legacy uses rather than presented as the standard it no longer is.

Instagram grid dimensions, exactly

Two numbers decide whether a grid looks crisp: the per-tile export size (fixed by the tile shape) and the minimum source resolution your original needs so no tile gets upscaled — three columns of 1,080 px means every layout wants a source at least 3,240 px wide, and the required height grows with each row:

LayoutMin source · 3:4 tiles (1080×1440)Min source · 1:1 tiles (1080×1080)
3 × 1 — banner row3,240 × 1,440 px3,240 × 1,080 px
3 × 23,240 × 2,880 px3,240 × 2,160 px
3 × 3 — full square of the grid3,240 × 4,320 px3,240 × 3,240 px
3 × 43,240 × 5,760 px3,240 × 4,320 px

Smaller sources still work — the splitter scales them up — but Instagram’s recompression is kindest to images that arrive at full resolution. When you’re commissioning or designing the artwork, design at the table’s size from the start.

Posting the grid, step by step

  1. Frame, slice, download. One ZIP arrives with post-01.jpg through post-09.jpg — that’s publishing order, already reversed for you — plus a posting-order note you can hand to whoever publishes.
  2. Publish in filename order, back to back. post-01 first; don’t let unrelated posts slip in mid-sequence or they’ll wedge into the artwork.
  3. Keep tile captions minimal and consistent. One shared campaign line and the tracked link; the tiles are scenery, the announcement post is the show.
  4. Make it permanent or plan the teardown. Pin all three tiles of a 3×1 banner to hold it forever, or resume normal posting in multiples of three so the artwork shifts in clean rows.

A grid is a campaign asset, not a content strategy

The strongest use of a sliced grid is a moment: a launch week, a rebrand reveal, a season opener. Plan it like one — the tiles go out back-to-back in posting order (the file numbers handle the sequencing), the banner owns the profile for the campaign window, and either you pin a 3×1 row to make it permanent or you accept the shift when normal publishing resumes. Schedule the tiles and the teardown in your content calendar so the grid doesn’t linger half-broken — and treat the banner as one cut of the launch’s core asset alongside the feed-facing versions, per the repurposing workflow.

Frequently asked questions

Why does this tool default to 3:4 tiles instead of squares?

Because Instagram's profile grid stopped being square: through 2025 the grid moved to 3:4 portrait thumbnails. A banner sliced into perfect squares now gets cropped by the grid itself, with misaligned seams — which silently broke years of square-tile tutorials and tools. The 3:4 default exports tiles at 1080×1440 so the assembled grid lines up the way the preview shows. The classic 1:1 mode remains for anyone designing against the old layout or reposting elsewhere.

Why are the files numbered in reverse?

The grid is reverse-chronological: your newest post takes the top-left slot. To assemble the image correctly you publish the bottom-right tile first and the top-left tile last — so the downloads are named post-01, post-02… in publishing order, not visual order. Upload them in filename order and the puzzle solves itself.

What happens to my grid when I post something new afterward?

Every new post shifts the whole grid by one slot, which knocks a multi-row banner out of alignment — the part most grid tutorials skip. Two honest strategies: keep posting in multiples of three so rows shift cleanly as rows, or treat the banner as a temporary campaign asset with a planned teardown. For something permanent, see the pinning trick below.

Can I make a banner row permanent?

Yes — this is the most underused grid feature: Instagram lets you pin three posts, and pinned posts hold the top row regardless of what you publish afterward. Slice a 3×1 banner, publish its three tiles (right to left), pin all three, and the row survives every future post. It's the only grid arrangement that doesn't fight the shift problem.

Will splitting reduce image quality?

The tool exports each tile at full Instagram resolution (1080×1440 for 3:4, 1080×1080 for square) from your original pixels — no upscaling unless your source is smaller than the grid needs, so start from an image at least ~3,300px wide for a clean three-column slice. Instagram recompresses every upload regardless; sharp, high-contrast source material survives that best.

Do grid tiles hurt engagement?

Individually, usually yes — a tile is a fragment, and fragments don't perform in the feed where they appear without their neighbors. Treat a grid as profile furniture for the people who visit you (launches, rebrands, link-in-bio moments), not as nine feed posts. Caption the tiles minimally, don't count them against your content mix, and put the feed-performing version of the announcement in a proper post or carousel.