Image Resizer

Resize images by exact dimensions or percentage entirely in your browser. Download the result instantly.

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1. Upload an image by clicking the drop zone or dragging a file onto it. 2. Enter the desired width and height in pixels, or use a percentage scale. 3. Toggle the aspect ratio lock to maintain or override the original proportions. 4. Select the output format and quality level for the resized image. 5. Preview the resized image and click download to save it.

About This Tool

The Image Resizer lets you change the width and height of any image directly in your browser. Upload a JPEG, PNG, GIF, or WebP file and set your target dimensions by exact pixel values or by percentage. The tool processes everything client-side using the Canvas API, so your images are never uploaded to a server.

You can resize by entering specific width and height values, or lock the aspect ratio and change just one dimension to scale proportionally. A percentage mode lets you quickly reduce or enlarge an image by a fixed factor. The tool displays both the original and resized dimensions so you always know exactly what you are getting.

This is ideal for preparing images for social media profiles, website thumbnails, email attachments, or any situation where you need an image at a specific size. The resized image can be downloaded as PNG or JPEG with adjustable quality settings for JPEG output.

Frequently Asked Questions

You can resize JPEG, PNG, GIF, WebP, and BMP images. The output can be saved as PNG (lossless) or JPEG (with adjustable quality) depending on your needs.
Yes. Toggle the aspect ratio lock, then enter either the desired width or height. The other dimension will be calculated automatically to preserve the original proportions.
The tool works within your browser memory limits. Most modern browsers handle images up to about 16,384 pixels on a side. For very large images, you may need a desktop application.
Reducing an image dimensions usually decreases the file size. Additionally, if you export as JPEG, you can lower the quality slider to further reduce the file size at the cost of some visual fidelity.
No. All processing happens locally in your browser using the HTML5 Canvas API. Your images never leave your device.

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