Thay đổi kích thước hình ảnh trực tuyến — Miễn phí & Riêng tư

How to Resize Images

Drag and drop an image or click to select it. Supports JPG, PNG, and WebP formats.

Enter the desired width and height in pixels. Lock the aspect ratio to prevent distortion.

Click resize and download the result. The original file remains unchanged.

Your images never leave your device. All resizing happens in your browser using WebAssembly — no server uploads.

No registration, no file limits, no watermarks. Resize as many images as you need, completely free.

Maintain proportions automatically when resizing. Enter width or height and the other dimension adjusts to prevent distortion.

Are my images uploaded to a server?

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

Can I resize multiple images at once?

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

Will resizing reduce image quality?

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

What formats are supported?

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

Will enlarging an image make it blurry?

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

Can I resize for specific social media sizes?

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

Does this tool work on my phone?

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

Can I maintain the aspect ratio when resizing?

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