Change DPI while exporting jpg

[Mariusz360054837l7y]

• Lightroom for mobile platform. I use on android and have problem because i can't export jpg using more than 96 DPI. Standard for lots of web to share is 300 DPI. How it is posible that such great version of lightroom in my case used on tablet where i can do really nice preposting using pen don't give me posibility to change to 300DPI exported jpg. I read information on community that dpi is just for printing, maybe Yes but it's also minimal standard to such page like 500px and more. For me it is not answer that i can do it in lightroom classic or Photoshop it's obviois for me. I paid for subscribed version lightroom for android because most imlortant was to be simple preposting also on trip without notebook.  Just on simple tablet. Please help how to solve that problem or maybe update lightroom for android to implement DPI change option while exporting. 

[Kevin Stohlmeyer]

@Mariusz360054837l7y when exporting - all metadata is stripped out including resolution. Your file exports at actual size but in pixel dimensions at 72 (or 96) ppi.

[Stephen Marsh]

In Photoshop Save As retains PPI metadata, but Export As doesn't (this is by design). The old Save for Web feature in Photoshop does have the option to retain this metadata or to remove it. I have no idea what options your mobile platform offers. Good luck!

P.S. You can use Photoshop or Bridge or ExifTool on a desktop to add the metadata back into exported files without having to open and resave the JPEG data:

https://community.adobe.com/t5/photoshop-ecosystem-discussions/photoshop-script-to-add-missing-resol...

https://community.adobe.com/t5/bridge-discussions/bridge-script-to-add-missing-resolution-metadata-t...

[davescm]

'Standard for lots of web to share is 300 DPI'...'it's also minimal standard to such page like 500px and more'

PPI (note it is PPI not DPI, literally pixels per inch) is irrelevant for web use. It is ignored by browsers and whether it is 1ppi, 600ppi, or no ppi value at all it makes no difference to the displayed image on screen. All that matters is the pixel size of the image i.e. x pixels wide by y pixels wide.That is why it is removed on Exporting and in Save for Web (unless the all metadata option is chosen). Both are designed for on screen images where PPI is ignored. The reason you see 96ppi reported in an image viewing application is that with no ppi present a value is inserted in case the image size for printing needs to be calculated. Photoshop inserts 72ppi in that event.

As Kevin states above you can use Save As , or Save for Web with all data checked, to include the ppi value in the metadata with your image but browsers will just ignore it and it will not affect the viewing of your images on screen at all.

Dave