Image Resizer
Resize images online to target pixel dimensions with optional aspect ratio preservation.
Run tool
Resize your digital photos and graphic files to custom pixel dimensions with this online image tool. Select an image file to upload, then set your desired width and height values in pixels. By default, the tool sets the bounding box to 800 pixels wide by 600 pixels high and keeps the maintain aspect ratio option turned on. When you preserve proportions, the tool fits your photo inside the specified bounding dimensions without stretching or warping, rounding the calculated pixel values to whole numbers. If you need exact rectangular dimensions for specific banner slots, social media headers, or website containers, uncheck the aspect ratio box to force the output to match your requested width and height directly. Once processed, the tool displays the resized image along with both the original and resulting pixel dimensions. Make sure to upload a valid, supported image file to prevent processing errors.
Instructions
- Upload the image file you want to resize using the image input field.
- Enter the target width in pixels (defaults to 800).
- Enter the target height in pixels (defaults to 600).
- Keep Maintain Aspect checked to scale proportionally within the bounds, or uncheck it to force exact width and height.
- Run the tool to process the image and view the resized output alongside the original and new dimensions.
Examples
- Scale a 1600x1200 photo down to fit within an 800x600 box with Maintain Aspect enabled, producing an 800x600 output without distortion.
- Force a 1200x800 graphic into an exact 400x400 square for an avatar by disabling Maintain Aspect.
FAQ
What happens when Maintain Aspect Ratio is checked?
The tool scales your image so it fits entirely inside the target width and height bounds while preserving its original proportions, rounding pixel values to whole numbers.
What happens if I disable Maintain Aspect Ratio?
The image is resized to match the exact width and height values you enter, which may stretch or compress the visual content if the aspect ratio differs.
What happens if no image file is uploaded?
If the image data field is left empty or the file cannot be decoded, the tool reports a processing error instead of generating an output.