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Bug?? where dpi in web save is saved as 96?

Forum|Forum|1 year ago
August 1, 2024
6 replies
881 views

After all the new file settings have been worked on 72dpi
If you save the jpg web, it will be fixed to 96dpi.

If you save jpg under a different name, it will be saved normally as 72dpi.

Does anyone know how to solve the problem?

1.zip

Windows

This topic has been closed for replies.

Correct answer D Fosse

That's right. This is by design, not a bug.

Pixels per inch is a way to translate pixels into a physical size measurement where it's needed. On screen there is no need for it, because a pixel grid is already defined by the physical screen itself. The image pixels just align to the physical screen pixels. That's your resolution on screen.

Export and Save For Web are intended for screen, not print or anything else. So they both strip the resolution metadata from the file altogether. An exported file doesn't have a ppi number at all; not 72, not 96, not 300, not anything.

Most applications, however, will assign a default number if there isn't one. Photoshop assigns 72, Microsoft applications assign 96. The file might be printed, or font sizes (a physical measurement) might need to be defined. So they assign a number, but it doesn't really matter what the number is as long as there is one.

NB, colourmanagement

Community Expert

@MiMimMim as @D Fosse mentioned - PPI is only relevant for print, its just an instruction on how to sue the image's pixels. AFAIK all that matters for web is the pixel dimensions - I'd say whatever the PPI is, it doesn’t matter

I hope this helps neil barstow, colourmanagement net - adobe forum volunteer - co-author: 'getting colour right' google me "neil barstow colourmanagement" for lots of free articles on colour management Help others by clicking "Correct Answer" if the question is answered. Found the answer elsewhere? Share it here. "Upvote" is for useful posts.

L

Lumigraphics

Legend

Pick one of the options in yellow to include PPI metadata.

D Fosse

Community Expert

Yes, Save For Web can retain metadata including ppi.

The point is that if this really is for web, the ppi number is not used anyway. It can be 1 ppi or 10 000 ppi and it won't make the slightest difference.

D Fosse

Community Expert

It is not saved as 96. It is saved without a ppi value.

If it's too big on screen, it's because there are too many pixels. Reduce the pixel size. It has absolutely nothing to do with any ppi number.

M

MiMimMimAuthor

Participant

But it's saved as 96, and sometimes the size of the jpg file is so big that it doesn't go up on the web.

And if you check, the image is stored in a very large size.

Is it correct that this issue has nothing to do with being saved as 96ppi?

In the past, there was no awareness of these problems, but problems often arise suddenly from a month ago.

Conrad_C

Community Expert

But it's saved as 96, and sometimes the size of the jpg file is so big that it doesn't go up on the web...Is it correct that this issue has nothing to do with being saved as 96ppi?
By @MiMimMim

For web/mobile graphics, what matters is not the ppi, but the pixel dimensions: the width and height in pixels.

For example, suppose someone exported these two images. Which one is too large for the web, and which one is OK?

40,000 x 30,000 pixels at 72 ppi

600 x 400 pixels at 1200 ppi

The first one is too large for the web even though it is 72 ppi, because what is making it too large is not the ppi, but the overly large 40,000 px width and 30,000 px height in pixels.

The second one is good for a web page because it is 600 x 400 pixels; that it is 1200 ppi does not matter because it has the correct width and height in pixels for its space on the web page.

Pixel density or resolution, or ppi/dpi, are only important when designing a page to be printed. ppi/dpi resolution does not matter for graphics used on web pages or mobile device apps.

You posted a picture of your screen showing that in Save for Web (Legacy), you are exporting at 1000 x 1000 pixels. That means it is going to be 1000 x 1000 pixels regardless of the ppi value, so the dimensions are good for the web. That the metadata says it’s 96 ppi or 72 ppi does not matter, because you have the 1000 x 1000 pixel dimensions that are important for a web page.

D Fosse

Correct answer

Community Expert

That's right. This is by design, not a bug.

Pixels per inch is a way to translate pixels into a physical size measurement where it's needed. On screen there is no need for it, because a pixel grid is already defined by the physical screen itself. The image pixels just align to the physical screen pixels. That's your resolution on screen.

Export and Save For Web are intended for screen, not print or anything else. So they both strip the resolution metadata from the file altogether. An exported file doesn't have a ppi number at all; not 72, not 96, not 300, not anything.

Most applications, however, will assign a default number if there isn't one. Photoshop assigns 72, Microsoft applications assign 96. The file might be printed, or font sizes (a physical measurement) might need to be defined. So they assign a number, but it doesn't really matter what the number is as long as there is one.

Bojan Živković11378569

Community Expert

Whether 72 or 96 PPI (not DPI) for web use is irrelevant, as the Resolution field is disregarded on the web. There's no need to concern yourself with it.

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