how to change the dpi of an image











up vote
14
down vote

favorite
5












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










share|improve this question


















  • 2




    For those who are confused about the difference between dpi and resolution, read The Myth of DPI.
    – Dheeraj V.S.
    Apr 10 '15 at 12:13










  • This question is unclear. Depending on the use case, changing the resolution can mean either keeping all of the pixels and changing the size it will occupy, or keeping the size the same and changing the pixels. I won't vote to close at this point, but readers landing here should understand the difference, and how the solutions relate to their needs.
    – fixer1234
    Nov 28 at 21:45















up vote
14
down vote

favorite
5












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










share|improve this question


















  • 2




    For those who are confused about the difference between dpi and resolution, read The Myth of DPI.
    – Dheeraj V.S.
    Apr 10 '15 at 12:13










  • This question is unclear. Depending on the use case, changing the resolution can mean either keeping all of the pixels and changing the size it will occupy, or keeping the size the same and changing the pixels. I won't vote to close at this point, but readers landing here should understand the difference, and how the solutions relate to their needs.
    – fixer1234
    Nov 28 at 21:45













up vote
14
down vote

favorite
5









up vote
14
down vote

favorite
5






5





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










share|improve this question













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







jpeg dpi






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Jun 14 '13 at 13:36









Deb

66471530




66471530








  • 2




    For those who are confused about the difference between dpi and resolution, read The Myth of DPI.
    – Dheeraj V.S.
    Apr 10 '15 at 12:13










  • This question is unclear. Depending on the use case, changing the resolution can mean either keeping all of the pixels and changing the size it will occupy, or keeping the size the same and changing the pixels. I won't vote to close at this point, but readers landing here should understand the difference, and how the solutions relate to their needs.
    – fixer1234
    Nov 28 at 21:45














  • 2




    For those who are confused about the difference between dpi and resolution, read The Myth of DPI.
    – Dheeraj V.S.
    Apr 10 '15 at 12:13










  • This question is unclear. Depending on the use case, changing the resolution can mean either keeping all of the pixels and changing the size it will occupy, or keeping the size the same and changing the pixels. I won't vote to close at this point, but readers landing here should understand the difference, and how the solutions relate to their needs.
    – fixer1234
    Nov 28 at 21:45








2




2




For those who are confused about the difference between dpi and resolution, read The Myth of DPI.
– Dheeraj V.S.
Apr 10 '15 at 12:13




For those who are confused about the difference between dpi and resolution, read The Myth of DPI.
– Dheeraj V.S.
Apr 10 '15 at 12:13












This question is unclear. Depending on the use case, changing the resolution can mean either keeping all of the pixels and changing the size it will occupy, or keeping the size the same and changing the pixels. I won't vote to close at this point, but readers landing here should understand the difference, and how the solutions relate to their needs.
– fixer1234
Nov 28 at 21:45




This question is unclear. Depending on the use case, changing the resolution can mean either keeping all of the pixels and changing the size it will occupy, or keeping the size the same and changing the pixels. I won't vote to close at this point, but readers landing here should understand the difference, and how the solutions relate to their needs.
– fixer1234
Nov 28 at 21:45










7 Answers
7






active

oldest

votes

















up vote
14
down vote













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






share|improve this answer























  • Resolution and DPI are different things.
    – Austin T French
    Jun 14 '13 at 13:46






  • 4




    I just re explained why I said "Resolution", you can see it on the screenshot (pixel/inch)
    – eXshade
    Jun 14 '13 at 13:58








  • 1




    Gave +1 after the update, as it is an important distinction.
    – Austin T French
    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










  • I voted this answer but cannot take my upvote away. I think the best way of doing is this is software independent online. See my answer below.
    – Léo Léopold Hertz 준영
    Jul 23 '14 at 12:45


















up vote
7
down vote













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.






share|improve this answer



















  • 3




    +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












  • "The image you are loading has 16 bits per channel. GIMP can only handle 8 bit..." GIMP is limited in this regard.
    – Frenzy Li
    Nov 9 '17 at 20:43


















up vote
3
down vote













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.







share|improve this answer




























    up vote
    2
    down vote













    You can change the DPI of your jpeg image without an application using this free online tool:



    convert.town/image-dpi




    1. Enter your new DPI value

    2. Upload your image.

    3. Download the adjusted image.






    share|improve this answer




























      up vote
      2
      down vote













      I think the best way of doing is this is software independent and without installation processes.




      1. Google online DPI converter

      2. Click First search. For me, the first hit is online-convert.com at the time, but their URLs are time variant so google for them: dpi online-convert

      3. Select file to upload

      4. Change the value of DPI only to 200

      5. Done!






      share|improve this answer























      • -1 only works if you are lucky
        – lindhe
        Aug 15 '17 at 20:55


















      up vote
      0
      down vote













      For resize an image I use Faststone Photo Resizer. It has an option for DPI.




      • In advance settings you can choose all the settings: resolution, DPI, procentage. It's great.






      share|improve this answer




























        up vote
        -1
        down vote













        Don't waste your time, images don't have a resolution (DPI) images are resolution independent



        When printing tell the printer what size you wish to print the image and at what quality, then let the printer do the rest






        share|improve this answer

















        • 6




          Some image formats store a resolution and some don't. That value is used by some applications for purposes like sizing the displayed image on the page.
          – fixer1234
          Jul 13 '15 at 6:25










        • This answer is just plain wrong.
          – lindhe
          Aug 15 '17 at 20:53











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        7 Answers
        7






        active

        oldest

        votes








        7 Answers
        7






        active

        oldest

        votes









        active

        oldest

        votes






        active

        oldest

        votes








        up vote
        14
        down vote













        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






        share|improve this answer























        • Resolution and DPI are different things.
          – Austin T French
          Jun 14 '13 at 13:46






        • 4




          I just re explained why I said "Resolution", you can see it on the screenshot (pixel/inch)
          – eXshade
          Jun 14 '13 at 13:58








        • 1




          Gave +1 after the update, as it is an important distinction.
          – Austin T French
          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










        • I voted this answer but cannot take my upvote away. I think the best way of doing is this is software independent online. See my answer below.
          – Léo Léopold Hertz 준영
          Jul 23 '14 at 12:45















        up vote
        14
        down vote













        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






        share|improve this answer























        • Resolution and DPI are different things.
          – Austin T French
          Jun 14 '13 at 13:46






        • 4




          I just re explained why I said "Resolution", you can see it on the screenshot (pixel/inch)
          – eXshade
          Jun 14 '13 at 13:58








        • 1




          Gave +1 after the update, as it is an important distinction.
          – Austin T French
          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










        • I voted this answer but cannot take my upvote away. I think the best way of doing is this is software independent online. See my answer below.
          – Léo Léopold Hertz 준영
          Jul 23 '14 at 12:45













        up vote
        14
        down vote










        up vote
        14
        down vote









        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






        share|improve this answer














        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







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Jun 14 '13 at 13:57

























        answered Jun 14 '13 at 13:44









        eXshade

        37913




        37913












        • Resolution and DPI are different things.
          – Austin T French
          Jun 14 '13 at 13:46






        • 4




          I just re explained why I said "Resolution", you can see it on the screenshot (pixel/inch)
          – eXshade
          Jun 14 '13 at 13:58








        • 1




          Gave +1 after the update, as it is an important distinction.
          – Austin T French
          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










        • I voted this answer but cannot take my upvote away. I think the best way of doing is this is software independent online. See my answer below.
          – Léo Léopold Hertz 준영
          Jul 23 '14 at 12:45


















        • Resolution and DPI are different things.
          – Austin T French
          Jun 14 '13 at 13:46






        • 4




          I just re explained why I said "Resolution", you can see it on the screenshot (pixel/inch)
          – eXshade
          Jun 14 '13 at 13:58








        • 1




          Gave +1 after the update, as it is an important distinction.
          – Austin T French
          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










        • I voted this answer but cannot take my upvote away. I think the best way of doing is this is software independent online. See my answer below.
          – Léo Léopold Hertz 준영
          Jul 23 '14 at 12:45
















        Resolution and DPI are different things.
        – Austin T French
        Jun 14 '13 at 13:46




        Resolution and DPI are different things.
        – Austin T French
        Jun 14 '13 at 13:46




        4




        4




        I just re explained why I said "Resolution", you can see it on the screenshot (pixel/inch)
        – eXshade
        Jun 14 '13 at 13:58






        I just re explained why I said "Resolution", you can see it on the screenshot (pixel/inch)
        – eXshade
        Jun 14 '13 at 13:58






        1




        1




        Gave +1 after the update, as it is an important distinction.
        – Austin T French
        Jun 14 '13 at 15:08




        Gave +1 after the update, as it is an important distinction.
        – Austin T French
        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




        Paint.NET has the right terminology. DPI is only for printing, not for display on monitors.
        – Karan
        Jun 14 '13 at 23:09












        I voted this answer but cannot take my upvote away. I think the best way of doing is this is software independent online. See my answer below.
        – Léo Léopold Hertz 준영
        Jul 23 '14 at 12:45




        I voted this answer but cannot take my upvote away. I think the best way of doing is this is software independent online. See my answer below.
        – Léo Léopold Hertz 준영
        Jul 23 '14 at 12:45












        up vote
        7
        down vote













        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.






        share|improve this answer



















        • 3




          +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












        • "The image you are loading has 16 bits per channel. GIMP can only handle 8 bit..." GIMP is limited in this regard.
          – Frenzy Li
          Nov 9 '17 at 20:43















        up vote
        7
        down vote













        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.






        share|improve this answer



















        • 3




          +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












        • "The image you are loading has 16 bits per channel. GIMP can only handle 8 bit..." GIMP is limited in this regard.
          – Frenzy Li
          Nov 9 '17 at 20:43













        up vote
        7
        down vote










        up vote
        7
        down vote









        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.






        share|improve this answer














        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.







        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Jun 14 '13 at 13:59









        pnuts

        5,50032239




        5,50032239










        answered Jun 14 '13 at 13:39









        Wolves

        32513




        32513








        • 3




          +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












        • "The image you are loading has 16 bits per channel. GIMP can only handle 8 bit..." GIMP is limited in this regard.
          – Frenzy Li
          Nov 9 '17 at 20:43














        • 3




          +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












        • "The image you are loading has 16 bits per channel. GIMP can only handle 8 bit..." GIMP is limited in this regard.
          – Frenzy Li
          Nov 9 '17 at 20:43








        3




        3




        +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






        +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














        "The image you are loading has 16 bits per channel. GIMP can only handle 8 bit..." GIMP is limited in this regard.
        – Frenzy Li
        Nov 9 '17 at 20:43




        "The image you are loading has 16 bits per channel. GIMP can only handle 8 bit..." GIMP is limited in this regard.
        – Frenzy Li
        Nov 9 '17 at 20:43










        up vote
        3
        down vote













        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.







        share|improve this answer

























          up vote
          3
          down vote













          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.







          share|improve this answer























            up vote
            3
            down vote










            up vote
            3
            down vote









            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.







            share|improve this answer












            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.








            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Jun 14 '13 at 13:40









            duDE

            13.1k52937




            13.1k52937






















                up vote
                2
                down vote













                You can change the DPI of your jpeg image without an application using this free online tool:



                convert.town/image-dpi




                1. Enter your new DPI value

                2. Upload your image.

                3. Download the adjusted image.






                share|improve this answer

























                  up vote
                  2
                  down vote













                  You can change the DPI of your jpeg image without an application using this free online tool:



                  convert.town/image-dpi




                  1. Enter your new DPI value

                  2. Upload your image.

                  3. Download the adjusted image.






                  share|improve this answer























                    up vote
                    2
                    down vote










                    up vote
                    2
                    down vote









                    You can change the DPI of your jpeg image without an application using this free online tool:



                    convert.town/image-dpi




                    1. Enter your new DPI value

                    2. Upload your image.

                    3. Download the adjusted image.






                    share|improve this answer












                    You can change the DPI of your jpeg image without an application using this free online tool:



                    convert.town/image-dpi




                    1. Enter your new DPI value

                    2. Upload your image.

                    3. Download the adjusted image.







                    share|improve this answer












                    share|improve this answer



                    share|improve this answer










                    answered May 20 '15 at 13:58









                    sunset

                    17113




                    17113






















                        up vote
                        2
                        down vote













                        I think the best way of doing is this is software independent and without installation processes.




                        1. Google online DPI converter

                        2. Click First search. For me, the first hit is online-convert.com at the time, but their URLs are time variant so google for them: dpi online-convert

                        3. Select file to upload

                        4. Change the value of DPI only to 200

                        5. Done!






                        share|improve this answer























                        • -1 only works if you are lucky
                          – lindhe
                          Aug 15 '17 at 20:55















                        up vote
                        2
                        down vote













                        I think the best way of doing is this is software independent and without installation processes.




                        1. Google online DPI converter

                        2. Click First search. For me, the first hit is online-convert.com at the time, but their URLs are time variant so google for them: dpi online-convert

                        3. Select file to upload

                        4. Change the value of DPI only to 200

                        5. Done!






                        share|improve this answer























                        • -1 only works if you are lucky
                          – lindhe
                          Aug 15 '17 at 20:55













                        up vote
                        2
                        down vote










                        up vote
                        2
                        down vote









                        I think the best way of doing is this is software independent and without installation processes.




                        1. Google online DPI converter

                        2. Click First search. For me, the first hit is online-convert.com at the time, but their URLs are time variant so google for them: dpi online-convert

                        3. Select file to upload

                        4. Change the value of DPI only to 200

                        5. Done!






                        share|improve this answer














                        I think the best way of doing is this is software independent and without installation processes.




                        1. Google online DPI converter

                        2. Click First search. For me, the first hit is online-convert.com at the time, but their URLs are time variant so google for them: dpi online-convert

                        3. Select file to upload

                        4. Change the value of DPI only to 200

                        5. Done!







                        share|improve this answer














                        share|improve this answer



                        share|improve this answer








                        edited Jul 26 '15 at 14:25

























                        answered Jul 23 '14 at 12:43









                        Léo Léopold Hertz 준영

                        2,02585498




                        2,02585498












                        • -1 only works if you are lucky
                          – lindhe
                          Aug 15 '17 at 20:55


















                        • -1 only works if you are lucky
                          – lindhe
                          Aug 15 '17 at 20:55
















                        -1 only works if you are lucky
                        – lindhe
                        Aug 15 '17 at 20:55




                        -1 only works if you are lucky
                        – lindhe
                        Aug 15 '17 at 20:55










                        up vote
                        0
                        down vote













                        For resize an image I use Faststone Photo Resizer. It has an option for DPI.




                        • In advance settings you can choose all the settings: resolution, DPI, procentage. It's great.






                        share|improve this answer

























                          up vote
                          0
                          down vote













                          For resize an image I use Faststone Photo Resizer. It has an option for DPI.




                          • In advance settings you can choose all the settings: resolution, DPI, procentage. It's great.






                          share|improve this answer























                            up vote
                            0
                            down vote










                            up vote
                            0
                            down vote









                            For resize an image I use Faststone Photo Resizer. It has an option for DPI.




                            • In advance settings you can choose all the settings: resolution, DPI, procentage. It's great.






                            share|improve this answer












                            For resize an image I use Faststone Photo Resizer. It has an option for DPI.




                            • In advance settings you can choose all the settings: resolution, DPI, procentage. It's great.







                            share|improve this answer












                            share|improve this answer



                            share|improve this answer










                            answered Nov 28 at 10:09









                            NinaL

                            11




                            11






















                                up vote
                                -1
                                down vote













                                Don't waste your time, images don't have a resolution (DPI) images are resolution independent



                                When printing tell the printer what size you wish to print the image and at what quality, then let the printer do the rest






                                share|improve this answer

















                                • 6




                                  Some image formats store a resolution and some don't. That value is used by some applications for purposes like sizing the displayed image on the page.
                                  – fixer1234
                                  Jul 13 '15 at 6:25










                                • This answer is just plain wrong.
                                  – lindhe
                                  Aug 15 '17 at 20:53















                                up vote
                                -1
                                down vote













                                Don't waste your time, images don't have a resolution (DPI) images are resolution independent



                                When printing tell the printer what size you wish to print the image and at what quality, then let the printer do the rest






                                share|improve this answer

















                                • 6




                                  Some image formats store a resolution and some don't. That value is used by some applications for purposes like sizing the displayed image on the page.
                                  – fixer1234
                                  Jul 13 '15 at 6:25










                                • This answer is just plain wrong.
                                  – lindhe
                                  Aug 15 '17 at 20:53













                                up vote
                                -1
                                down vote










                                up vote
                                -1
                                down vote









                                Don't waste your time, images don't have a resolution (DPI) images are resolution independent



                                When printing tell the printer what size you wish to print the image and at what quality, then let the printer do the rest






                                share|improve this answer












                                Don't waste your time, images don't have a resolution (DPI) images are resolution independent



                                When printing tell the printer what size you wish to print the image and at what quality, then let the printer do the rest







                                share|improve this answer












                                share|improve this answer



                                share|improve this answer










                                answered Jul 13 '15 at 6:10









                                Dave

                                19




                                19








                                • 6




                                  Some image formats store a resolution and some don't. That value is used by some applications for purposes like sizing the displayed image on the page.
                                  – fixer1234
                                  Jul 13 '15 at 6:25










                                • This answer is just plain wrong.
                                  – lindhe
                                  Aug 15 '17 at 20:53














                                • 6




                                  Some image formats store a resolution and some don't. That value is used by some applications for purposes like sizing the displayed image on the page.
                                  – fixer1234
                                  Jul 13 '15 at 6:25










                                • This answer is just plain wrong.
                                  – lindhe
                                  Aug 15 '17 at 20:53








                                6




                                6




                                Some image formats store a resolution and some don't. That value is used by some applications for purposes like sizing the displayed image on the page.
                                – fixer1234
                                Jul 13 '15 at 6:25




                                Some image formats store a resolution and some don't. That value is used by some applications for purposes like sizing the displayed image on the page.
                                – fixer1234
                                Jul 13 '15 at 6:25












                                This answer is just plain wrong.
                                – lindhe
                                Aug 15 '17 at 20:53




                                This answer is just plain wrong.
                                – lindhe
                                Aug 15 '17 at 20:53


















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