To change an image's DPI in Photoshop, go to Image > Image Size. Uncheck Resample Image, because this setting will upscale your image, which will make it lower quality. Now, next to Resolution, type in your preferred resolution, set as Pixels/Inch.
Can a JPG be 300 DPI?
I'm sure you'll be inundated with replies to the effect that there's no such thing as a 300dpi jpg. Basically, just save your jpg file as a normal data file at the camera's full resolution, i.e 8.2MP, which will probably be a couple of Mb in file size depending on the camera's quality setting.
How do I make a JPG 300 DPI?
Here's how you convert to 300 dpi Click File > Open > Choose your file. Next, click Image > Image Size, set the resolution to 300 if it is less than 300. Click resample, and choose Preserve Details (enlargement) on the drop-down menu. Then click OK.Jan 9, 2019
How do I know if my JPEG is 300 DPI?
To find out an image's DPI in Windows, right-click on the file name and select Properties > Details. You'll see the DPI in the Image section, labeled Horizontal Resolution and Vertical Resolution. On a Mac, you need to open the image in Preview and select Tools > Adjust Size. It's labeled Resolution.