Resize images using pixel dimensions or a percentage of their original size. Use the aspect-ratio lock for a single image, or percentage mode when a batch contains different shapes. Compare output dimensions before downloading images individually or together as a ZIP.
lightbulb When to use this tool
- check_circle Reduce a large photo to the pixel dimensions needed by a website or upload form.
- check_circle Scale a mixed batch to the same percentage while retaining each image's proportions.
- check_circle Prepare a smaller image before trying to meet a file-size limit in Image Compressor.
Inputs and results
Input: Images, pixel dimensions or percentage scale, aspect-ratio setting and output format.
Output: Resized images with original/output dimensions, individual downloads and an optional ZIP.
Why use our tool?
Set explicit pixel dimensions
Pixel mode makes requested dimensions explicit.
Scale each image proportionally
Percentage mode scales each image relative to its own original dimensions.
Review output dimensions
Output dimension comparisons help catch unwanted stretching before you use the result.
How it works
Add your images and choose Pixels or Percentage.
For a single image in Pixels mode, keep the aspect ratio locked and change one dimension. Check the resulting second dimension.
For a batch with different shapes, use Percentage mode so each image scales from its own dimensions.
Choose a suitable output format, resize, and check the displayed output dimensions.
Download the files. If your destination also limits KB, use Image Compressor and check the resulting file size.
Examples
science Resize a landscape image proportionally
For one 400 × 200 image, locked width 200 gives height 100. The proportional formula is new height = original height × new width ÷ original width.
science Scale different shapes by 50%
Percentage mode at 50% turns a 1200 × 800 image into 600 × 400 and a 900 × 1200 portrait into 450 × 600. Each dimension is halved, so each output has one quarter of its original pixel count.
science Check a form's two separate limits
If a form asks for 600 × 400 pixels and less than 200 KB, first set the dimensions here. Then check the downloaded byte size and use Image Compressor if needed. Correct dimensions do not guarantee the KB limit.
Limitations
Enlarging dimensions cannot recreate missing detail. Changing both width and height can stretch an image; batch pixel settings apply to all images, so use percentage mode for mixed aspect ratios. Canvas re-encoding can remove metadata and animation. This tool changes pixels, not a requested print DPI value, and does not guarantee a file-size limit.
Frequently Asked Questions
How do I resize without stretching an image? expand_more
Will reducing width by half reduce file size by half? expand_more
Can I set an image to 300 DPI here? expand_more
Does enlarging a small image improve its detail? expand_more
Processing & Privacy
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