Image Resizer Help Center
Welcome to the Image Resizer Tool's Help Center. Here you will find detailed guides and FAQs on how to use this tool.
How-to Guide
Follow these three simple steps to quickly resize your images. The entire process is done in your browser, ensuring speed and privacy.
Upload Images
Click the "Select Files" button or drag and drop your image files (supports JPG, PNG, WebP) into the dashed area. You can select and upload multiple images for batch processing.
Configure Options
Choose a resize mode: "By Pixels", "By Percentage", or "By File Size". Enter your desired dimensions, scale, or target file size. It is recommended to keep "Keep Aspect Ratio" checked to avoid distortion.
Download Images
After setting the options, click the "Start Resizing" button. Once processed, you can download the resized images individually or click "Download All Images" to get them all at once.
Feature Details
Resize Modes
We offer three flexible ways to resize your images:
- By Pixels: Directly specify the exact width and height of the output image in pixels. Ideal for situations requiring fixed-size images, like website banners or social media avatars.
- By Percentage: Scale the image based on a percentage of its original size. For example, entering
50will reduce both the width and height of the image by half. Suitable for proportional scaling. - By File Size: Aims to get your image close to a specific file size (in KB). The tool first resizes the image to fit within the maximum width/height you specify, then adjusts the compression quality to meet the target file size. This works best for JPG and WebP formats.
Keep Aspect Ratio
This is a very important option, enabled by default.
- When checked: In "By Pixels" mode, when you enter a width or height, the other dimension is automatically calculated based on the original aspect ratio. This ensures the image is not stretched or squashed, preserving its original look.
- When unchecked: You can freely set any width and height combination, but this may lead to image distortion. Only uncheck this if you are sure you need non-proportional stretching.
Frequently Asked Questions (FAQ)
Yes, this tool is completely free. You can use all its features without any limits, registration, or payment required.
Yes. All image processing is done in your local browser using JavaScript. Your image files are never uploaded to any server. We cannot access or store any of your image data.
We currently support the three most common web image formats: JPG (JPEG), PNG, and WebP. The resized image will retain its original format.
The "By File Size" feature uses an algorithm to find a compression quality that brings the file size as close as possible to your target. Due to the nature of compression, hitting an exact byte count is very difficult, so the final result is a close approximation. This feature is most effective for lossy formats like JPG and WebP. For lossless formats like PNG, the ability to reduce file size by adjusting quality is very limited.
The tool supports batch processing, but the number and size of images you can process depend on your computer's performance and browser memory limits. For most modern computers, processing several dozen regular-sized images at once is usually not a problem.
Image distortion usually occurs because the "Keep Aspect Ratio" option was unchecked during resizing. Please ensure this option is selected so that when you modify the width or height, the tool automatically calculates the other dimension to maintain the original proportions.