Resize any image to custom or preset dimensions. Lock aspect ratio to prevent distortion. Supports JPEG, PNG, and WebP output formats.
An image resizer changes the dimensions of images to exact pixel values or percentage scales. This is essential for web developers, designers, and content creators who need images at specific sizes for websites, apps, or print. Our browser-based tool uses the Canvas API to resize JPEG, PNG, and WebP images with options for custom dimensions, preset sizes like HD and 4K, and aspect ratio locking to prevent distortion. Since all processing happens locally in your browser, your images remain completely private and never leave your device.
Enlarging images may reduce quality. Shrinking images generally maintains quality. Use high-quality output settings for best results.
When enabled, changing width automatically adjusts height (and vice versa) to maintain the original proportions.
You can output as JPEG, PNG, or WebP. JPEG is best for photos, PNG for graphics with transparency, and WebP for modern web use.
The limit depends on your browser and device memory. Most modern devices handle images up to 50MB without issues.