Expand Images for Instagram Stories
A step-by-step guide to expanding a photo to Instagram Story's 9:16 full-screen frame with AI, without cropping the subject or re-shooting.
Instagram Stories and Reels covers fill the entire phone screen at 1080x1920 — a tall 9:16 frame. A square feed photo or a landscape shot dropped straight into that space gets cropped tight on the top and bottom, or shrunk down with blank bars on the sides. Here’s how to expand an existing photo to fit the full-screen frame instead.
Why this comes up so often
Most photos aren’t shot in 9:16 to begin with — square feed posts, travel photos, and screenshots are all a different shape. Re-shooting every photo vertically isn’t realistic for daily posting, so the practical move is reshaping the photo you already have.
Step by step
- Open the Instagram Story preset — the canvas locks to the 9:16 ratio automatically.
- Upload your photo. If it has a distinctive background — a specific sky, a patterned wall, a recognizable location — add a short direction like “continue the sky and horizon naturally” so the model matches what’s already there.
- Generate and review the result at full size. Check the top and bottom edges specifically, since that’s where the new pixels are added for a square-to-vertical expansion.
- Download the finished image — it’s already sized for Instagram’s Story upload, no further cropping needed.
What to check before posting
Compare the expanded area against the original: does the sky color and cloud pattern match, does the ground texture continue naturally, are there any obvious seams where old and new pixels meet? For photos with people in them, look closely at anything near the original crop line — hands, hair, and clothing edges are the hardest details for any AI expansion model to continue convincingly.
When to skip expansion and just re-shoot
If the source photo is heavily cropped already — say, a tight headshot with almost no background visible — there may not be enough context for the model to continue convincingly, and a fresh vertical photo will look better than a heavily expanded one. Expansion works best when there’s already a reasonable amount of background visible to extend from.
Related reading
For the TikTok-specific version of this same workflow, see the TikTok Cover Image Size Guide. For an honest look at where this kind of AI expansion struggles, see When Uncrop AI Can’t Save a Bad Crop.
Try the Instagram Story preset directly — 2 free previews, no sign-up required.