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Is it 72 or 96 dpi? Baseline 1:1 graphics for web.

New Here ,
Sep 28, 2024 Sep 28, 2024

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I keep getting idiot posts about 300  dpi for print - I KNOW what you need to do for print. I just want the current 1:1  screen dpi for documents.

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correct answers 1 Correct answer

Community Expert , Sep 28, 2024 Sep 28, 2024

It's PPI, not DPI.

 

For web, it's historically been neither 72 ppi or 96 ppi – it's the total absence of resolution metadata altogether as it's irrelevant for monitor/device display purposes. A 7 ppi image displays in a browser the same size as a 7000 ppi file of the same pixel dimensions. Some software displays the absence of this metadata as 72ppi (Mac OS, Adobe apps and other apps) or 96 ppi (Windows OS and other apps).

 

As Adobe Photoshop requires a resolution value to consistently size sm

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Community Expert ,
Sep 28, 2024 Sep 28, 2024

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It's PPI, not DPI.

 

For web, it's historically been neither 72 ppi or 96 ppi – it's the total absence of resolution metadata altogether as it's irrelevant for monitor/device display purposes. A 7 ppi image displays in a browser the same size as a 7000 ppi file of the same pixel dimensions. Some software displays the absence of this metadata as 72ppi (Mac OS, Adobe apps and other apps) or 96 ppi (Windows OS and other apps).

 

As Adobe Photoshop requires a resolution value to consistently size smart objects, Adobe are now including the source document resolution metadata via Export As (which it didn't historically do). Export > Save for Web (Legacy) allowed the inclusion or exclusion of this metadata in supported formats.

 

And 300 ppi for print is just a general historical rule of thumb, best case scenario of AM/Halftone screening when running a 150 lpi (lines per inch) screen when viewed at arm's length. The historical formula is 1.5-2.0 x the linescreen when used at 100% size, so 225-300 ppi has always been acceptable and that's why you hear 300 ppi so often (150 lpi x2 = 300 ppi).

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New Here ,
Sep 28, 2024 Sep 28, 2024

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Thanks. We were still using dpi as a default up into the aughts. PPI, got it.

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New Here ,
Sep 28, 2024 Sep 28, 2024

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I'm a crusty old timer - I remember using After Effects when it was still made by CoSA. Back when CD ROMs were hip and cool - like an EMAIL on the Information Super Highway and other cheesy buzzwords.

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Community Expert ,
Sep 29, 2024 Sep 29, 2024

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@Gunilla5EBE – You're welcome!

 

On a related note, I have some scripts to directly set the resolution metadata of JPEG (not PNG or other formats) to 300ppi without opening the image data into Photoshop. The value of 300 can easily be changed as needed.

 

Photoshop versions:

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