Online Image Resize Tool - Free Batch Image Resizer

Free online image resize tool. Quickly resize JPG, PNG, WebP images. No software needed, efficient batch processing. Keep aspect ratio to avoid distortion.

Resize by pixels or percentage

Maintain aspect ratio to prevent distortion

Batch processing with one-click download

User-Friendly

No installation required. Simply open the webpage and start resizing. Drag-and-drop upload support, intuitive interface for beginners. Process multiple images simultaneously for enhanced efficiency.

Flexible Adjustment

Resize images by pixels or percentage, with optional aspect ratio preservation. Preview and adjust multiple times until perfect. Real-time display of dimensions and file size.

Batch Processing

Upload multiple images simultaneously for batch resizing. Compare original and resized dimensions and file sizes. Download individually or as a complete package.

Local Processing

All image processing happens in your browser. No server uploads required, ensuring image security and privacy. Fast processing with no upload/download waiting time.

Clear Preview

Real-time progress display and resize preview. View detailed information for both original and resized images, including dimensions and file size, helping you make better adjustment decisions.

High-Quality Output

Using advanced image processing algorithms to maintain image clarity after resizing. Support multiple adjustments and previews until achieving the desired result.

Online Image Resize Tool Use Cases

E-commerce Product Images

Quickly resize product images to e-commerce platform specifications (e.g., 800x800 square). Maintain aspect ratio to prevent product distortion. Perfect for clothing, home goods, and electronics product images.

Social Media Cover Images

Resize images to match platform-specific cover dimensions while preserving core content. Preview ensures important elements aren't cropped. Ideal for event posters and portfolio displays.

Photography Work

Scale photographs proportionally for various display needs. Perfectly preserve original composition and aspect ratio. Suitable for landscapes, portraits, and creative work resizing.

Avatars and Thumbnails

Resize images to standard avatar dimensions (e.g., 200x200) or generate website thumbnails. Maintain aspect ratio to ensure undistorted profile pictures.

Wallpaper Adjustment

Resize high-resolution images for various display devices, such as desktop wallpapers (1920x1080) or mobile wallpapers. Maintain original proportions for optimal visual appeal.

Document Images

Resize images for documents and presentations while maintaining proportions. Perfect for tutorial screenshots, diagrams, and various documentation materials.

How to Use Image Resize Tool

1

Upload Images

Drag and drop images into the upload area, or click to select files. Supports JPG, PNG, and WebP formats. Multiple images can be uploaded simultaneously.

2

Set Dimensions

Choose to resize by pixels or percentage, then enter target dimensions. We recommend checking "Maintain aspect ratio" to prevent image distortion.

3

Resize and Download

Click "Resize" or "Resize All" to process images. Once complete, download individual images or get all as a zip file.

Online Image Resize Tool Frequently Asked Questions

How to prevent image distortion?

We strongly recommend checking the "Maintain aspect ratio" option. Without this option, images may be forcibly stretched to target dimensions, causing distortion. For specific sizes, adjust the longer side first and let the tool automatically calculate the shorter side.

Why did my resized image become larger?

Increased dimensions may lead to larger file sizes - this is normal. For smaller file sizes, try our image compression tool, which reduces file size while maintaining quality.

Why are some resized images not sharp?

Enlarging small images may result in blurriness due to limited original pixel count. Avoid excessive enlargement or use higher-resolution source images. Reducing image size typically won't affect clarity.

How to maintain uniform ratios in batch processing?

Use percentage mode for batch resizing, such as setting all images to 50% of original size. When using pixel mode, enable "Maintain aspect ratio" to automatically calculate proportional dimensions.

What image formats are supported?

We support common formats including JPG/JPEG, PNG, and WebP. Resized images maintain their original format - PNG files remain PNG, preserving transparency effects.

How to handle lag when processing many images?

Process images in smaller batches of 10-20 images. Larger files (over 10MB) may require more processing time. Download completed images promptly to free up browser memory.