Image Resizer

The Image Resizer tool allows you to change the dimensions of any image file directly in your browser. Simply upload an image, set your desired width and height dimensions, adjust quality settings if needed, choose an output format, and download the resized version. The tool uses HTML5 Canvas API to process images entirely client-side without uploading your files to any server.

The Image Resizer supports common image formats including JPG/JPEG, PNG, GIF, and WebP files. You can also convert between these formats during resizing by selecting your preferred output format.

Image quality depends on several factors. When you make an image smaller, some quality loss is inevitable, but our tool uses high-quality resampling algorithms to minimize this loss. You can also adjust the quality slider to control the compression level of the output image. Higher quality settings will produce larger file sizes but better image quality.

By default, the "Maintain aspect ratio" checkbox is enabled. This means if you change either the width or height, the other dimension will automatically adjust to maintain the original proportions of your image. If you want to stretch or compress the image to specific dimensions regardless of proportions, simply uncheck this option.

The tool can handle images up to 10MB in size. However, very large images might require more processing time and could potentially cause performance issues depending on your device capabilities. For optimal performance, we recommend resizing images under 5MB.

JPEG is best for photographs and complex images with many colors, offering good compression but loses some quality (lossy). PNG maintains full quality (lossless) and supports transparency, but results in larger file sizes. WebP is a modern format that offers both good compression and quality, often 25-35% smaller than JPEG at equivalent quality levels, with support for transparency like PNG.

Each social media platform has different recommended image dimensions. For profile pictures, common sizes are 400x400 pixels (square). For cover images, dimensions vary widely (e.g., Facebook: 851x315px, Twitter: 1500x500px). Upload your image, enter the required dimensions for your target platform, maintain aspect ratio if needed, and adjust quality settings before downloading.

Yes, your data is completely secure. All image processing happens locally in your browser - we never upload your images to any server. Your original images and the resized versions remain entirely on your device, ensuring complete privacy.

The current version only supports resizing one image at a time. For multiple images, you'll need to process them individually. Each image can be resized with different settings for maximum flexibility.

There are many reasons to resize images: (1) To meet specific size requirements for websites or applications, (2) To reduce file size for faster loading and less storage space, (3) To prepare images for social media platforms, (4) To create thumbnails, (5) To standardize dimensions for a collection of images, or (6) To optimize images for email attachments or messaging apps.

To create a thumbnail, upload your image and set smaller dimensions (typically between 100-250 pixels wide, depending on your needs). You can maintain the aspect ratio for a properly proportioned thumbnail. For web thumbnails, choosing the WebP format often provides the best balance between quality and file size.

This tool primarily changes the pixel dimensions of your image rather than the DPI (dots per inch) or PPI (pixels per inch) settings. DPI/PPI are most relevant for printing and don't affect how images display on screens. If you need specific DPI settings for printing, you may need to use desktop software after resizing.