KiiMix Social Media Image Sizes
Compare six platform presets and open a free online tool to crop your image in your browser without uploading it. Results are JPEG. The dimensions below are KiiMix export sizes; each tool page explains platform guidance and publishing checks.
Social platform sizes
YouTube thumbnail cropper
Crop a 16:9 YouTube thumbnail. Export a 3840 × 2160 JPEG.
Open toolInstagram post cropper
Crop an Instagram post to 4:5. Export a 1080 × 1350 JPEG.
Open toolInstagram Story cropper
Crop a 9:16 Instagram Story. Export a 1080 × 1920 JPEG.
Open toolX / Twitter image cropper
Crop a landscape X / Twitter post image to 1200 × 628.
Open toolXiaohongshu cover cropper
Crop a 3:4 Xiaohongshu cover. Export a 1242 × 1656 JPEG.
Open toolTikTok cover cropper
Crop a 9:16 cover image. Export a 1080 × 1920 JPEG.
Open tool| Use | KiiMix export size | Aspect ratio | Size notes |
|---|---|---|---|
| YouTube thumbnail cropper | 3840 × 2160 | 16:9 | Matches YouTube’s thumbnail recommendation; upload limits vary by device
|
| Instagram post cropper | 1080 × 1350 | 4:5 | Photos support 1.91:1–3:4; this 4:5 preset is within that range
|
| Instagram Story cropper | 1080 × 1920 | 9:16 | KiiMix preset; check the tool page for publishing guidance |
| X / Twitter image cropper | 1200 × 628 | ≈1.91:1 | KiiMix preset; check the tool page for publishing guidance
|
| Xiaohongshu cover cropper | 1242 × 1656 | 3:4 | 3:4 follows product-note guidance; the pixel size is a KiiMix preset
|
| TikTok cover cropper | 1080 × 1920 | 9:16 | KiiMix preset; check the tool page for publishing guidance |
Check how the image will be used
Instagram Story and TikTok presets both use 9:16, but captions and controls can cover different parts of the image. Preview your image where you plan to publish it. X link previews and Xiaohongshu product images have separate requirements from post photos and note covers.
Need a different size?
Use the image cropper to choose your own crop or another preset. If you only need a smaller file, the compressor keeps the whole image. Keep the original so you can make another version later.