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I have an jpeg file of 300 dpi. I need to reduce it to 200dpi. How can I do that?

Do I need any specific application or it can be done using Picasa/paint/MS picture manager, if yes how? Thanks

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3 Answers

Use Paint.NET

http://www.dotpdn.com/downloads/pdn.html

Go to Image > Resize > Change its resolution (dpi)

As I said the resolution in the Paint.NET is the DPI (pixel/inch)

enter image description here

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Resolution and DPI are different things. –  AthomSfere Jun 14 '13 at 13:46
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I just re explained why I said "Resolution", you can see it on the screenshot (pixel/inch) –  eXshade Jun 14 '13 at 13:58
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Gave +1 after the update, as it is an important distinction. –  AthomSfere Jun 14 '13 at 15:08
    
Paint.NET has the right terminology. DPI is only for printing, not for display on monitors. –  Karan Jun 14 '13 at 23:09
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I suggest using GIMP; it is a free image-editing solution, and it allows you to change the resolution, in pixels per inch, in both the x and y dimensions. I believe that this program can accomplish what you are looking for.

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+1 An extraordinarily powerful program that I suspect would also make tea and polish my shoes (if I knew enough of its features!) Nobody should be without it. –  pnuts Jun 14 '13 at 14:01
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And I would take this one free tool: http://www.irfanview.com

To change DPI for the currently loaded image, click the "i" icon ("i" for information) on the IrfanView toolbar. Change the DPI, click OK, and save the image.

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