Usage Instructions
This tool runs entirely in your browser, with no need to upload files to a server, ensuring your privacy and security. You can resize a large number of images at once.
- Select images: Click the “Select Images” button, or drag and drop image files directly into the designated area. You can select one or multiple images.
- Choose resize mode:
- Stretch to specified size: Forces the image to the width and height you set, which may change the original aspect ratio.
- Keep aspect ratio and fill blank areas: Scales the image according to its original aspect ratio so it fits the canvas of the specified size. Blank areas will be filled with the color you choose.
- Set target size: Enter the desired final image width and height (in pixels).
- Start processing: Click the “Start Processing” button, and the tool will begin batch processing all selected images locally.
- Download results: Once processing is complete, click the “Download All Results (ZIP)” button to save all resized images to your computer as a compressed archive.
FAQ
Q: Is this tool free?
A: Yes, this tool is completely free, and all features can be used directly in your browser.
Q: Will my images be uploaded to your server?
A: No. All image processing is done in your local browser using JavaScript. Your image files never leave your computer, and we do not store any user data.
Q: Why does the browser slow down when processing many images?
A: Because all calculations are performed on your computer, processing many or high-resolution images consumes more CPU and memory resources and may cause the browser to freeze briefly. We recommend processing very large batches of images in smaller groups.
Q: Why can’t I choose millimeters (mm) as the unit?
A: Web standards use pixels (px) as the core unit. Converting millimeters to pixels depends on DPI (dots per inch), and the web environment cannot accurately determine a screen’s DPI. To ensure accurate and consistent results, we use pixels as the standard unit.
Q: Why is the downloaded ZIP file empty or corrupted after extraction?
A: This usually happens when the number of images being processed is very large or a single image file is too large, which may exceed the browser’s memory processing limit. Please try reducing the number of images processed at one time or refresh the page and try again.
