Resizing images: pixels and aspect ratios
Learn how to resize images with pixel dimensions, the original aspect ratio or percentage presets, and download the result as PNG, JPG, WebP, PDF, BMP or TIFF.
Resize several images together
Choose batch editing at the top of the editor and add up to 20 images. Width or height mode preserves each original aspect ratio. Scale uses each original size; exact dimensions make all outputs the same size.
Each file can be up to 20 MB, with 100 MB of total input. Apply the settings, preview the results and download a ZIP. Failed files are marked while the others continue. Stopping preserves completed results. Save results before changing settings or running again.
Set width and height in pixels
Resizing changes the pixel dimensions of the whole image. With the aspect ratio locked, changing one dimension calculates the other. A 1200×800px image becomes 600×400px when its width is set to 600px.
Pixel dimensions are rounded to whole numbers. Very small images may not keep an exact ratio. Unlock the ratio to set dimensions independently, which can stretch or squeeze the image.
Scale is calculated from the original
Use the 25%, 50%, 75%, 100%, 150% or 200% preset. Presets always use the original image rather than the current inputs, and turn the ratio lock on.
Choose 100% or reset to return to the original dimensions. Enlarging the image does not recover detail that was missing from the source.
Check and save the result
Generate the result to see its preview, pixel dimensions and file size. PNG preserves transparency and JPG fills transparent areas with white. Smaller dimensions do not always mean a smaller file, because the source format and compression also matter.
Input files support up to 20 MB. Input and output dimensions are limited to 16 megapixels and 8,192px per side. Download the result before changing settings or navigating away.