Top Methods to Resize Multiple Images for Any Devices

Resizing multiple images for various devices can be a time-consuming task if done manually, especially when working with large image files or numerous pictures. Whether you’re resizing photos for social media, websites, or personal use, maintaining image quality while resizing is essential.

Fortunately, there are several methods and tools available that allow you to resize multiple images at once, saving you time and ensuring uniformity across different platforms and devices. This guide explores the most efficient ways to resize multiple images for all devices, from desktop software to online tools and apps.

Part 1. Methods to Resize Images

When resizing images, there are several methods available, depending on your needs. Below are the three most common methods used to resize images:

Crop

Cropping involves removing parts of the image to adjust its dimensions. By cutting away excess areas, you can change the image's aspect ratio or focus on specific portions, like a subject’s face or an object. Cropping does not affect the quality of the remaining image but may eliminate important details depending on how much is removed.

Compress

Image compression reduces the file size without significantly affecting the image's visual quality. This is ideal when you're looking to save storage space or reduce upload times, especially for websites or social media platforms. Compression can either be lossy or lossless. Lossy compression reduces file size more but may slightly degrade quality, while lossless compression keeps quality intact.

Change Pixels or Resolutions

Changing the pixels or resolution refers to adjusting the width and height of an image in terms of pixel count. Lowering the resolution will make the image smaller, while increasing it may make the image appear blurry or pixelated if the source image is of low quality. When resizing by pixels, it’s crucial to maintain the aspect ratio to avoid distortion. Adjusting the resolution is common when preparing images for printing or ensuring they fit specific dimensions required by social media or websites.

Resample

Resampling involves changing the total number of pixels in an image by either adding or removing them. This method adjusts the image’s resolution while maintaining its overall appearance. Resampling is ideal when you need to change both the size and quality of an image, especially for printing or enlarging small images.

Aspect Ratio Adjustment

Adjusting the aspect ratio ensures the image maintains the correct proportion between width and height. This method resizes the image while preventing distortion. It’s useful when you need to fit an image into specific frame sizes for websites or social media platforms without compromising its look.

Part 2. 3 Best Bulk Image Resizers For Win & Mac

Resizing multiple images at once on your computer is often more efficient when using desktop software that supports batch processing. Here are the three best tools for Windows and Mac:

1. UniConverter

UniConverter is a versatile tool that allows you to resize multiple images at once efficiently. Whether you need to resize multiple photos for a social media campaign or a website, this tool helps you adjust the size without losing quality and provide image enhancer for futher image retouching. Its batch processing feature ensures that you can resize multiple pictures in one go, saving you valuable time. UniConverter supports a wide range of formats export, including JPG, PNG, and GIF, making it a reliable choice for bulk image resizing.

Key Features

Batch resizing of images in various formats.
High-quality output that prevents pixelation.
Supports resizing for different platforms (social media, websites, etc.).
Allows for the adjustment of both resolution and dimensions.
Simple, user-friendly interface for quick processing.

Pros & Cons

Pros

Easy to use with a simple interface.
High-quality output with no loss in detail.
Supports a wide variety of image formats.
Quick processing, especially when handling multiple images.

Cons

Some advanced features are locked in the free version.
Requires installation, which might take up storage space.

Step by Step Guide

If you need to resize multiple images quickly and efficiently, UniConverter provides a simple and powerful tool for batch resizing. Follow these easy steps to resize your images in bulk:

Step 1: Launch UniConverter and Access the Image Resizer Tool
Open UniConverter on your computer and go to the "Toolbox" section. Select the "Batch Image Editor" option to start the resizing process.

install uniconverter

Step 2: Add Images for Resizing
Click the "Add Files" button to upload the images you want to resize. You can upload multiple images at once, and they will appear in the editing window for batch processing.

upload image

Step 3: Choose Your Resize Settings
Select the resize options to adjust the dimensions for all images. You can either manually enter the desired width and height or use one of the preset aspect ratios designed for common image sizes. You can also apply the same resizing to all images in the batch or customize them individually.

resize multiple image

Step 4: Export and Save the Resized Images
After you’ve previewed and are satisfied with the results, click the "Export All" button. Choose your preferred file format (e.g., JPEG, PNG) and save the resized images to a location on your computer.

save

Versatile Bulk Images Resizer

Resize Multiple Images on Win or Mac at Lossless Quality.

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2. Adobe Photoshop

Adobe Photoshop is one of the most powerful image editing tools available and offers advanced options for resizing multiple images. With Photoshop, you can resize multiple images at once using batch processing, which is perfect for professional photographers or designers needing to scale multiple images efficiently. It supports various formats and provides options for precise control over pixel dimensions, ensuring high-quality output even for large batches. Photoshop is the go-to choice for anyone looking for a professional-grade photo resizer for multiple images.

adobe photoshop