Resize Image File Size Photoshop. Make sure that resample image is selected and choose an interpolation method. In all cc editions of photoshop you can resize your image as needed directly from the export as dialog.
Resizing the dialog box resizes the preview window. The new file size for the image appears at the top of the image size dialog box with the old file size in parentheses. C shows that a higher resolution means better quality you can see the relationship between image size and resolution in the image size dialog box choose image resize image size.
Then click the ok button to commit the changes for more detail see 2.
If your image has layers with styles applied to them select scale styles to scale the effects in the resized image. To resize an image. Choose image image size. Select file export save for web and change the settings in the save for web window.