AI Image Expander for Social Media
Upload one image and turn it into ready-to-post covers for RedNote, Instagram, Pinterest, TikTok, Reels and Shorts.
RedNote
3:4
4:5
2:3
TikTok
9:16
Live Workspace
Create platform-ready images
Upload one source image, choose a social cover ratio, and let AI complete the background for a ready-to-post result.
1. Upload image
Click to upload, or drag an image here.
Supports JPG, PNG, and WEBP up to 10MB.
2. Choose platform size
The system expands the background to match the target ratio.
Each candidate costs 20 credits. 3:4 / 4:5 generate 1 image by default; 2:3 / 9:16 generate 3 images by default.
Failure handling Failed generations are refunded
You need to sign in before generating. Sign in
Preview and results
Switch between candidates and download the selected image.
Upload an image and this area will show your preview and generated candidates.
Adapt Images for Mainstream Social Cover Sizes
Upload one image and let AI expand it into publishing-ready ratios for different platforms, without cropping, stretching, or blank borders.
3:4RedNote / Xiaohongshu
3:4 Cover
For cover-first discovery feeds.
4:54:5 Post
For vertical feed image posts.
2:32:3 Pin
For tall inspiration pins.
9:16TikTok
9:16 Cover
For vertical video covers.
9:16Reels
9:16 Cover
For short-form vertical covers.
9:16Shorts
9:16 Thumbnail
For vertical video thumbnails.
One Image, Covers for Every Platform
From upload and expansion to candidate review and download, built for social media creators.
AI Background Completion
No cropping, stretching, or borders. The image is naturally expanded from the original content so the new ratio feels complete.
Built-in Social Sizes
Generate RedNote 3:4, Instagram 4:5, Pinterest 2:3, and TikTok / Reels / Shorts 9:16 ratios in one click.
Multiple Candidates
For larger expansions like 2:3 and 9:16, the system creates multiple candidates so you can choose the most natural result.
Subject-first Protection
Standard mode keeps people, products, and key subjects visually stable while extending the surrounding background.
SISTINE