Image Resizer
Resize images directly in your browser. No server upload — processed safely on your device.
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Drag & drop an image or click to upload
Supports PNG, JPG, WebP, GIF, BMP
About Image Resizing
Image resizing changes the pixel dimensions (width and height) of an image.
• Downscale: Reduces file size, making it suitable for web uploads and email attachments.
• Upscale: Enlarges using pixel interpolation, but may reduce sharpness compared to the original.
• Aspect ratio lock: Maintains proportions to prevent distortion.
This tool uses the Canvas API to process images directly in your browser. No images are sent to any server.
Usage Examples
FAQ
Does enlarging an image reduce quality?
Yes, upscaling raster images beyond their original size uses pixel interpolation, which can reduce sharpness. It is best to avoid enlarging beyond the original dimensions when possible.
What happens if I unlock the aspect ratio?
You can set width and height independently, but if the proportions differ from the original, the image may appear stretched or squished.
Is transparency preserved?
PNG and WebP formats preserve transparency. If you output as JPG, transparent areas will be filled with white.
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