How to Use
- Upload Image: Click the upload area or drag & drop your image.
- Select Platform: Choose your target social media platform (e.g., Instagram, Twitter) from the left panel.
- Adjust Crop: Drag the crop box in the preview area to select the perfect part of your image. You can also rotate the image.
- Add Watermark (Optional): Check "Add Watermark" to overlay custom text for copyright protection.
- Download: Click "Download Image" to save the resized image to your device.
Social Media Dimensions Guide
| Platform | Type | Size (px) | Aspect Ratio |
|---|---|---|---|
| Square Post | 1080 x 1080 | 1:1 | |
| Portrait Post | 1080 x 1350 | 4:5 | |
| Story / Reels | 1080 x 1920 | 9:16 | |
| Twitter (X) | Post Image | 1200 x 675 | 16:9 |
| Twitter (X) | Header | 1500 x 500 | 3:1 |
| Shared Image | 1200 x 630 | 1.91:1 | |
| Post Image | 1200 x 627 | 1.91:1 | |
| YouTube | Thumbnail | 1280 x 720 | 16:9 |
| Chinese Social Media | |||
| WeChat Official Account | Top Cover | 900 x 383 | 2.35:1 |
| WeChat Official Account | Sub Cover | 500 x 500 | 1:1 |
| Xiaohongshu (Red Book) | Portrait Note | 1080 x 1440 | 3:4 |
| Xiaohongshu (Red Book) | Square Note | 1080 x 1080 | 1:1 |
| Xiaohongshu (Red Book) | Landscape Note | 1080 x 810 | 4:3 |
| Toutiao / Xigua | Cover | 1080 x 608 | 16:9 |
| Zhihu | Article Cover | 1080 x 608 | 16:9 |
FAQ
Does resizing reduce image quality? ▼
Generally no. We use high-quality resampling in the browser. As long as your original image is
high resolution, the resized version will look great. Upscaling small images may cause
blurriness.
Is my image uploaded to a server? ▼
No. All processing happens locally in your browser. Your photos never leave your device,
ensuring complete privacy.
Why does Instagram crop my photo? ▼
Instagram has strict aspect ratio rules (e.g., max 4:5 for vertical posts). If you upload a
taller image (like 9:16), it will be cropped. Use this tool to crop it to 4:5 beforehand to
control exactly what is shown.
What file formats are supported? ▼
We support standard web image formats including JPG, PNG, and WebP. Images are exported as
high-quality JPGs or PNGs.
Can I customize the dimensions? ▼
Currently, we focus on standard social media presets. However, you can manually adjust the crop
box freely if you don't select a locked aspect ratio.
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