Resize Photos is a free online photo tool for resizing and compressing your digital photos for posting on the web, in email or on forums. There is no software to download, just upload your pictures and begin applying effects like captions, borders, reflections, shadows, rounded corners, rotation,. Image Resizer is a Windows shell extension for bulk image-resizing. After installing PowerToys, right-click on one or more selected image files in File Explorer, and then select Resize pictures from the menu.

What is an image file size?

Images are composed by several dots called pixels, and each of them has a color, represented as a combination of three basic colors (red, green and blue). To store each of these pixels, 3 bytes (24 ones or zeros) are generally used. When an image is large, it may have millions of pixels, and that means storing all information for an image like that in a computer or any device will take millions of bytes.

Image files come in all sizes. Especially photos or stock photography are usually more than 3,000 pixels on their largest side. When uploading images to Facebook, Instagram, Wordpress or other online platforms, however, the file size and actual size of an image are often an issue. Press the 'Resize Image' button to crop, resize and optimize your image. Quickly resize image files online at the highest image quality. No software to install and easy to use.

When a camera or cellphone says it takes 10 megapixels photos, it means that each photo has 10 million pixels (mega = million). And having 10 million pixels means it takes 30 million bytes (or 30 megabytes) to store that photo (which is a lot of space!). If you want to send this photo (or many photos) to a friend by e-mail, it will have to transfer 30 megabytes of data and it will take a while to upload it and a lot for the recipient to download it later.

How can I reduce image file size?

Is there any solution? Yes, there are two main solutions. One of them is compressing the image: compression reduces file size without having to resize the image, but image quality will suffer as you increase compression and start losing more image data.

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The other solution is to resize your photo, decreasing the number of pixels it takes to store the image, which reduces it's file size proportionally. Reducing image size doesn't reduce image quality, although it may lose some very small details if they become too small.

Photos taken using modern cellphones and cameras usually have over 6 million pixels, while most cellphones, tablets, notebook or TV screens have only about 1.5 million pixels, which means you end up seeing a resized version of the image (you only use the full image if you print it). So if you resize your image, decreasing its width and height to a half, your image would have about the same number of pixels than the screens that will display it, so you wouldn't be losing any quality or detail at all, even looking at your image in full screen mode.

So remember, if you have a huge photo, you can reduce its file size by resizing it until it's about 1900 by 1100 pixels, and getting a JPG image with just a little compression (about 95% quality). Doing so, you will get a versatile image with great quality, that you can send to anyone without taking too much time, or spending too much bandwidth on your mobile data plan.

Reduce images is an online tool that allows you to apply both compression and size reduction online to any image, and save the resulting images in different image formats like JPG, PNG, GIF or BMP.

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Image Resizer is a Windows shell extension for bulk image-resizing. After installing PowerToys, right-click on one or more selected image files in File Explorer, and then select Resize pictures from the menu.

Drag and Drop

Image Resizer also allows you to resize images by dragging and dropping your selected files with the right mouse button. This allows you to quickly save your resized pictures in another folder.

Settings

Inside the PowerToys Image Resizer tab, you can configure the following settings.

Sizes

Add new preset sizes. Each size can be configured as Fill, Fit or Stretch. The dimension to be used for resizing can also be configured as Centimeters, Inches, Percent and Pixels.

Fill vs Fit vs Stretch

• Fill: Fills the entire specified size with the image. Scales the image proportionally. Crops the image as needed.
• Fit: Fits the entire image into the specified size. Scales the image proportionally. Does not crop the image.
• Stretch: Fills the entire specified size with the image. Stretches the image disproportionally as needed. Does not crop the image

The width and height of the specified size may be swapped to match the orientation (portrait/landscape) of the current image. To always use the width and height as specified, un-check: Ignore the orientation of pictures.

Fallback encoding

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The fallback encoder is used when the file cannot be saved in it's original format. For example, the Windows Metafile (.wmf) image format has a decoder to read the image, but no encoder to write a new image. In this case, the image cannot be saved in it's original format. Image Resizer enables you to specify what format the fallback encoder will use: PNG, JPEG, TIFF, BMP, GIF, or WMPhoto settings. This is not a file type conversion tool, but only works as a fallback for unsupported file formats.

Bulk Photo Resizer

File

The file name of the resized image can be modified with the following parameters:

• %1: Original filename
• %2: Size name (as configured in the PowerToys Image Resizer settings)
• %3: Selected width
• %4: Selected height
• %5: Actual height
• %6: Actual width

For example, setting the filename format to: %1 (%2) on the file example.png and selecting the Small file size setting, would result in the file name example (Small).png.

Setting the format to %1_%4 on the file example.jpg and selecting the size setting Medium 1366 x 768px would result in the file name: example_768.jpg.

You can also choose to retain the original last modified date on the resized image.

Auto width/height

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You can leave the height or width empty. This will honor the specified dimension and 'lock' the other dimension to a value proportional to the original image aspect ratio.

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Sub-directories

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You can specify a directory in the filename format to group resized images into sub-directories. For example, a value of %2%1 would save the resized image to SmallSample.jpg