Image Resizer
Resize images online by width, height or percentage while keeping the original aspect ratio when needed. Preview and download the resized image directly from your browser.
Browser-based image processing. The selected image is processed locally on your device.
What Is an Image Resizer?
An Image Resizer changes the pixel dimensions of an image. It can prepare images for websites, social media, YouTube thumbnails, profile graphics and other digital uses.
How Does This Image Resizer Work?
Select an image, choose the target dimensions or a percentage, and click Resize Image. The browser creates a resized copy with the HTML canvas system.
Lock Aspect Ratio
When enabled, changing the width or height keeps the original image proportions to reduce unwanted stretching or distortion.
Resize by Percentage
Percentage resizing scales both dimensions from the original image. For example, 50% produces approximately half the original width and height.
Image Resizing vs Image Compression
Resizing changes dimensions, while compression focuses on file size. They are related but different operations, so a resized file may sometimes be larger or smaller than the original.
Useful Image Presets
The tool includes convenient starting sizes for YouTube thumbnails, YouTube Shorts, square graphics and common social media layouts.
Frequently Asked Questions
Does this tool upload my image?
The resize operation runs in your browser and does not require an external image-processing API.
Can I resize JPG, PNG and WebP images?
Yes. Modern browsers can process JPG, JPEG, PNG and WebP images supported by the file input.
Will the final file always be smaller?
No. Dimensions and file size are separate properties. The output depends on the source image, format and quality.
Can I resize an image without distortion?
Yes. Keep Lock Aspect Ratio enabled when you want the original proportions maintained.
Can I use this for YouTube thumbnails?
Yes. A 1280 × 720 preset is included as a convenient YouTube thumbnail starting size.
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