When creating content for websites, social platforms, or online stores, the size of your images matters. Each platform has its own requirements, and uploading the wrong size can lead to cropped, blurry, or stretched visuals. The Social Image Sizer is a free, browser-based tool designed to solve this problem quickly and easily.

Why Image Size Matters

Every social media platform and e-commerce site has recommended image dimensions. For example, YouTube thumbnails must be 1280×720, Instagram posts are 1080×1080, and Shopify prefers square 1024×1024 product photos. If your image does not match these sizes, it may look distorted, cut off, or inconsistent with your brand presentation.

Key Features

• Preset Sizes
  Choose from a dropdown of popular presets such as YouTube, Instagram, Pinterest, Twitter/X, Facebook, and Shopify/Gumroad. Custom sizes are also supported.
• Resize Modes
  • Fit: keeps the full image and adds padding
  • Fill: crops edges to cover the space
  • Stretch: forces the image into the exact dimensions
• Background Options
  Use a simple toggle for transparent padding (PNG/WebP/AVIF) or default white background.
• Output Formats
  Save images as WebP, AVIF, JPEG, or PNG. WebP is set as the default for smaller file sizes, while PNG is available if transparency is needed.
• Text Overlay
  Add custom text directly onto images. Choose fonts, sizes, colors, styles, and shadows. Drag the text to position it anywhere. An optional outline feature makes text readable on both light and dark backgrounds.
• Privacy Friendly
  All processing is done locally in your browser. Images are never uploaded to a server.

How to Use

1. Open the app in your browser.
2. Upload an image and select a preset or enter custom dimensions.
3. Choose a resize mode and background setting.
4. (Optional) Add text overlay and style it.
5. Click Resize and then Download your new image.

Who Can Benefit

• Content creators making YouTube thumbnails or Instagram posts
• Online sellers preparing product images for Shopify or Gumroad
• Bloggers and marketers creating graphics for multiple platforms
• Anyone who needs fast, accurate image resizing without installing heavy software

Final Thoughts

The Social Image Sizer provides a simple, free way to prepare images for the web. With presets, lightweight design, and full browser processing, it is a practical tool for creators who want their visuals to look professional across every platform.

Try Social Image Sizer Now
Resize your images for YouTube, Instagram, Pinterest, Shopify, and more — instantly and for free.
Download Social Image Sizer