Image Resizer
Resize images to exact dimensions while preserving aspect ratio.
An image resizer changes an image's width and height, with an option to keep the aspect ratio, so it fits your required dimensions.
Choose an image from your device. It is processed locally and never uploaded.
How to Use the Image Resizer
- Upload an image. Choose an image to resize.
- Set dimensions. Enter width and/or height; aspect ratio can be kept.
- Download the result. Get the resized image in your chosen format.
This tool processes your input locally in your browser. Nothing is uploaded.
What Is Image Resizer?
Resizing images to the exact dimensions you need prevents the browser from scaling large files, saving bandwidth and improving load speed.
Why resize images?
Serving images larger than their display size wastes bandwidth and slows pages. Resizing to the required size improves performance and clarity.
Aspect ratio
Keeping the aspect ratio preserves the image's proportions so it is not stretched or squashed. Turn it off to force exact dimensions.
Key Features
- Exact width/height
- Keep aspect ratio
- Format selection
- Local processing
Examples
- Resize a 4000×3000 photo to 800×600 for a blog thumbnail.
Common Use Cases
- Thumbnails
- Social media sizes
- Web performance
Tips & Best Practices
- Provide width and height matching where the image is displayed.
- Combine resizing with compression for the smallest files.
Limitations
- Enlarging a small image does not add detail; it may look blurry.
Related Tools
Related Articles
Image Compressor – Complete Guide & Free Online Tool An image compressor reduces an image\ Free online tool included. Read guide → Image Resizer – Complete Guide & Free Online Tool An image resizer changes an image\ Free online tool included. Read guide → JPG to PNG Converter – Complete Guide & Free Online Tool A JPG to PNG converter transforms JPG images into PNG, a lossless format that preserves detail and supports transparency. Free online tool included. Read guide → PNG to JPG Converter – Complete Guide & Free Online Tool A PNG to JPG converter transforms PNG images into JPG, which produces smaller files by using lossy compression. Free online tool included. Read guide →
Frequently Asked Questions
What does an image resizer do?
It changes the width and height of an image, optionally preserving aspect ratio.
Can I resize to exact dimensions?
Yes, turn off "keep aspect ratio" to force exact width and height.
Is my image uploaded?
No, it is processed locally in your browser.
Is it free?
Yes.