Image Resizer Online
Resize JPG, PNG, and WebP images online by pixels or percentage while keeping the aspect ratio under your control. Everything is processed securely and directly inside your browser.
Resize Your Image
Upload an image and set your preferred dimensions.
Drag & Drop Your Image Here
or choose an image file from your device
JPG, PNG & WebP • Processed securely in your browserWhy Resize Images?
Prepare images for websites, social media, forms, email, and other digital uses.
Exact Dimensions
Set precise width and height values in pixels for full control over image dimensions.
Aspect Ratio Lock
Keep image proportions automatically while adjusting either width or height.
Quick Presets
Use common image sizes for social media, websites, thumbnails, and HD screens.
Privacy Friendly
Images are resized locally in your browser and are not uploaded to a server.
Mobile Friendly
The tool works across phones, tablets, laptops, and desktop browsers.
Free Tool
Resize images online without installing additional image editing software.
Manage Your Images
Explore more SmartBoxTool utilities for compressing, converting, resizing, and managing image files.
Explore Image Tools →Image Resizer Online
SmartBoxTool's Image Resizer lets you change image dimensions directly in your browser. Resize by exact pixels, percentage, or convenient preset sizes while optionally keeping the original aspect ratio.
How to Resize an Image?
- Click Choose Image or drag your image into the upload area.
- Select Pixels, Percentage, or Preset Size.
- Set your new dimensions.
- Choose an output format if needed.
- Click Resize Image and download the result.
When Should You Resize Images?
Image resizing is useful for social media posts, website banners, thumbnails, online forms, profile images, product photos, and anywhere specific dimensions are required.
Frequently Asked Questions
Which image formats are supported?
The resizer supports JPG, PNG, and WebP images.
Can I keep the original aspect ratio?
Yes. Keep Lock aspect ratio enabled and changing one dimension automatically updates the other.
Can I make an image larger?
Yes. You can enter larger dimensions or scale the image above 100%, although enlarging very small images may reduce sharpness.
Are my images uploaded?
No. Resizing happens locally in your browser.
Can I change the output format?
Yes. You can keep the original format or export as JPG, PNG, or WebP.