Image Resizer Online — Resize Images Free
Resize images online for free. Set custom width and height, maintain aspect ratio. Supports JPG, PNG, WebP. No upload, no signup.
拖放图片到此处，或点击选择文件
支持 PNG, JPEG, WebP, GIF 等格式
Resize images in your browser without uploading. Set custom width and height, maintain aspect ratio, and download in JPG or PNG format.
How to use Image Resizer Online — Resize Images Free
- Upload or drag an image into the tool.
- Set the target width and/or height in pixels.
- Choose whether to maintain aspect ratio.
- Download the resized image.
Features
- Resize by width, height, or both.
- Optional aspect ratio lock.
- Supports JPG, PNG, and WebP output.
- No upload — runs entirely in the browser.
FAQ
Will resizing reduce image quality?
Downscaling (making an image smaller) generally preserves quality well. Upscaling (making an image larger) will look pixelated because the tool can't add detail that wasn't in the original. Use vector graphics or AI upscaling for enlargements.
What is the maximum file size?
Since processing happens in your browser, the limit depends on your device's memory. Most images up to 20MB work fine. Very large images may cause the browser tab to freeze temporarily.
Does this support batch resizing?
This tool processes one image at a time. For batch resizing, consider a command-line tool like ImageMagick (mogrify) or a dedicated batch image processor.