โ† Guides

How to resize an image without losing quality

ImageToolkit ยท 8 min read ยท Updated 2026

Learn how to resize images while maintaining aspect ratio and quality, for web, social media and print.

What is image resizing?

Resizing means changing the dimensions (width and height) of an image. Unlike cropping, resizing keeps all the image content, just changing its size.

How to resize an image step by step

  1. Go to the resize image tool
  2. Select or drag your image
  3. Enter the desired new width or height in pixels
  4. Leave one field empty to automatically maintain the aspect ratio
  5. Click Resize
  6. Download the resized image

Resize for social media

PlatformTypeIdeal dimensions
InstagramSquare post1080 ร— 1080 px
InstagramStories1080 ร— 1920 px
FacebookPost1200 ร— 630 px
YouTubeThumbnail1280 ร— 720 px

Can I enlarge an image without losing quality?

Enlarging an image (upscaling) always results in some quality loss, as the computer needs to create pixels that didn't exist. Degradation is minimal for small increases (up to 120% of original size), but becomes noticeable for larger increases.

Related tools

Resize imageCrop imageCompress image