No. All processing happens in your browser using WebAssembly. Your images never leave your device.

Currently the tool resizes one image at a time. Upload each image and set the desired dimensions individually.

Enlarging images beyond their original size may reduce sharpness. Downscaling maintains quality. The tool uses high-quality resampling algorithms.

JPG, PNG, and WebP formats. The output maintains the same format as the input.

Enlarging beyond the original resolution may reduce sharpness. For best results, avoid upscaling more than 2x the original dimensions.

Yes. Enter exact pixel dimensions. Common sizes: Instagram post (1080x1080), Facebook cover (820x312), YouTube thumbnail (1280x720).

Yes. It works on any device with a modern browser. All processing happens locally without uploading your images anywhere.

Yes. Lock the aspect ratio and the tool will automatically calculate the other dimension when you change width or height.