tofo-boxtools

Image Resizer

image

Resize images to specific dimensions while maintaining aspect ratio if desired.

resize image onlineimage resizerchange image sizeresize jpg png webpimage dimension toolscale image online
🖼️

Click or drag & drop an image

🖼️
Image Tool

Try Image Compressor

Reduce image size up to 80% — free, instant, no upload needed.

→

What is Image Resizer?

Image Resizer is a free browser-based image tool that lets you process images without installing any software. Resize images to specific dimensions while maintaining aspect ratio if desired. All processing happens directly in your browser, so your images never leave your device.

How to Use Image Resizer

  1. 1

    Upload your image by clicking the upload area or dragging and dropping it.

  2. 2

    Enter the target width and height in pixels. Toggle 'Keep Ratio' to maintain the original aspect ratio.

  3. 3

    Select the output format: keep original, or convert to JPEG, PNG, or WebP.

  4. 4

    Click Resize Image and download the result. The original file is not modified.

Common Use Cases

  • →Optimizing images for web pages to improve loading speed.
  • →Preparing images for upload to platforms with size restrictions.
  • →Batch processing images for consistent output formats.

Frequently Asked Questions

What does 'Keep Ratio' do?

Keep Ratio (aspect ratio lock) ensures the image is not distorted when resizing. When you change the width, the height adjusts automatically to maintain the original proportions, and vice versa.

What is the maximum output size?

The tool supports output dimensions up to 5000×5000 pixels. For very large outputs, processing may take a few seconds depending on your device.

Will resizing reduce image quality?

Scaling down (making smaller) generally preserves quality well. Scaling up (making larger) will reduce sharpness as the tool must interpolate new pixels. For best results, always start with the highest resolution original.

Are my images uploaded to a server?

No. All resizing happens in your browser using the Canvas API. Your images never leave your device.

🖼️
Image Tool

Try Image Compressor

Reduce image size up to 80% — free, instant, no upload needed.

→