Start with the required dimensions
Check the destination first: an upload form may require exact width and height, while a website may only need a maximum width. Use pixel dimensions supplied by that destination instead of guessing. Scaling changes the pixel grid; it does not add detail to a small original.
Choose an image and preserve its proportions
Open the Image Resizer and select one static JPG, PNG, or WebP image. Enter either the requested width or height while Lock aspect ratio is enabled. The other value follows the original proportions. If the target frame has a different shape, resizing alone cannot fill it without empty space or distortion; crop the image separately.
Choose an output format
Keep the source format for a straightforward resize. PNG is useful when transparent pixels matter; JPEG is widely accepted for photographs but transparency is filled white. WebP can make compact web assets, but first check whether the destination accepts it.
Preview and verify the exported file
Generate the copy and check the reported pixel dimensions and preview. Download it, then inspect the downloaded file properties or reopen it in the target form. Image resampling can soften fine detail, especially after a large reduction; view it at the size where it will actually appear.
Understand what browser resizing changes
The conversion happens in the current browser tab, not on a JuzhenWork processing server. A browser canvas may alter color-profile or metadata details. This utility does not crop, upscale image detail, process animations, or guarantee that a destination will accept the file.