SNS用画像リサイズ - Free Online Tool | PivaBox

Resize images to perfect dimensions for Instagram, Twitter, Facebook, LinkedIn, YouTube, TikTok and more

How to Resize Images for Social Media

1. Upload your image by clicking the upload area or dragging and dropping
2. Select your target platform — Instagram, Twitter, Facebook, LinkedIn, YouTube, TikTok, Pinterest, or set custom dimensions
3. Choose a fit mode (Cover, Contain, or Stretch) and click Download to get your perfectly sized image

Frequently Asked Questions

Is Social Media Resizer free?

Yes, it is completely free. All image processing happens locally in your browser — no uploads to any server.

What are the correct image sizes for each platform?

We pre-configured the optimal dimensions for each platform based on their current guidelines: Instagram 1080x1080 square, 1080x1350 portrait, 1080x1920 story; Facebook 1200x630 post, 851x315 cover; Twitter 1200x675 post, 1500x500 header; LinkedIn 1200x627 post, 1584x396 cover; YouTube 1280x720 thumbnail; Pinterest 1000x1500 pin; TikTok 1080x1920.

Will resizing reduce my image quality?

The tool uses the browser high-quality Canvas rendering. For best results, upload an image that is equal to or larger than your target dimensions. The output is always PNG for maximum quality.