Not all metadata is XMP. Bridge is often a better place to this in most cases, however, if you wan't to do it in Photoshop, you can simply duplicate image layers to a new file (not duplicate the image, there is a difference). Most common file formats also accept metadata to various degrees/extents. So it is very hard permanently stop metadata from entering a file, however, you can remove metadata.
I hacked this script to do this for multiple layers, I think it is your best bet to remove all metadata, short of using ExifTool:
https://community.adobe.com/t5/photoshop/script-to-remove-all-meta-data-from-the-photo/m-p/10400906
/* Remove All Metadata & Retain Layers v2 - a brute force alternative to ExifTool
https://community.adobe.com/t5/photoshop/script-to-remove-all-meta-data-from-the-photo/m-p/10400906
Script to remove all metadata from the photo
30th July 2020 Update */
#target photoshop
app.bringToFront();
/* FLATTENED */
if (app.activeDocument.activeLayer.isBackgroundLayer) {
// alert('Flattened image...');
// Call function to duplicate all layers
DupeSelectedLayers.main = function () {
DupeSelectedLayers();
};
DupeSelectedLayers.main();
alertMessage();
}
/* SINGLE (TRANSPARENT) LAYER BUG WORKAROUND */
else if (app.activeDocument.layers.length === 1) {
// alert('Single layer image...');
// Set the original doc
var sourceDoc = app.activeDocument;
// Add a randomly named temp layer
app.activeDocument.artLayers.add();
app.activeDocument.activeLayer.name = "2563@361#47&-TEMP_LAYER";
// Select all layers and layer groups/sets!
selectAllLayers();
// Call function to duplicate all layers
DupeSelectedLayers.main = function () {
DupeSelectedLayers();
};
DupeSelectedLayers.main();
// Select & remove temporary layer
removeTempLayer(false);
// Set the duplicated document
var dupedDoc = app.activeDocument;
// Switch back to the original doc
app.activeDocument = sourceDoc;
// Select & remove temporary layer
removeTempLayer(false);
// Set the duped doc as the active doc
app.activeDocument = dupedDoc;
alertMessage();
}
/* MULTIPLE LAYERS */
else {
// alert('Multiple layer image...');
// Select all layers and layer groups/sets!
selectAllLayers();
// Call function to duplicate all layers
DupeSelectedLayers.main = function () {
DupeSelectedLayers();
};
DupeSelectedLayers.main();
alertMessage();
}
///// START FUNCTIONS /////
function selectAllLayers() {
// https://feedback.photoshop.com/photoshop_family/topics/i-cant-record-sellect-all-layers-in-script-listener-and-in-actions
var c2t = function (s) {
return app.charIDToTypeID(s);
};
var s2t = function (s) {
return app.stringIDToTypeID(s);
};
var descriptor = new ActionDescriptor();
var descriptor2 = new ActionDescriptor();
var reference = new ActionReference();
var reference2 = new ActionReference();
reference2.putEnumerated(s2t("layer"), s2t("ordinal"), s2t("targetEnum"));
descriptor.putReference(c2t("null"), reference2);
executeAction(s2t("selectAllLayers"), descriptor, DialogModes.NO);
reference.putProperty(s2t("layer"), s2t("background"));
descriptor2.putReference(c2t("null"), reference);
descriptor2.putEnumerated(s2t("selectionModifier"), s2t("selectionModifierType"), s2t("addToSelection"));
descriptor2.putBoolean(s2t("makeVisible"), false);
try {
executeAction(s2t("select"), descriptor2, DialogModes.NO);
} catch (e) { }
}
// Duplicate all selected layers to new document
function DupeSelectedLayers() {
function step1(enabled, withDialog) {
if (enabled !== undefined && !enabled)
return;
cTID = function (s) {
return app.charIDToTypeID(s);
};
sTID = function (s) {
return app.stringIDToTypeID(s);
};
var origFilename = app.activeDocument.name.replace(/\.[^\.]+$/, ''); // Remove filename extension from original
var dialogMode = (withDialog ? DialogModes.ALL : DialogModes.NO);
var desc1 = new ActionDescriptor();
var ref1 = new ActionReference();
ref1.putClass(cTID('Dcmn'));
desc1.putReference(cTID('null'), ref1);
// Use the original document filename + suffix
desc1.putString(cTID('Nm '), origFilename + "_NoMetadata");
// Use the original document filename, beware overwriting the original file and losing all metadata!
// desc1.putString(cTID('Nm '), origFilename );
var ref2 = new ActionReference();
ref2.putEnumerated(cTID('Lyr '), cTID('Ordn'), cTID('Trgt'));
desc1.putReference(cTID('Usng'), ref2);
desc1.putInteger(cTID('Vrsn'), 5);
executeAction(cTID('Mk '), desc1, dialogMode);
}
step1();
}
function removeTempLayer(makeVisible) {
// Select & remove temporary layer
var c2t = function (s) {
return app.charIDToTypeID(s);
};
var s2t = function (s) {
return app.stringIDToTypeID(s);
};
var descriptor = new ActionDescriptor();
var list = new ActionList();
var reference = new ActionReference();
reference.putName(s2t("layer"), "2563@361#47&-TEMP_LAYER");
descriptor.putReference(c2t("null"), reference);
descriptor.putBoolean(s2t("makeVisible"), makeVisible);
list.putInteger(3);
descriptor.putList(s2t("layerID"), list);
executeAction(s2t("select"), descriptor, DialogModes.NO);
app.activeDocument.activeLayer.remove();
}
function alertMessage() {
alert('File duplicated to remove metadata with "_NoMetadata" suffix added to the filename for safety.' + '\r' + 'Note: guides, color samplers, alpha channels, paths and other common document additions have not been copied.');
}
///// FINISH FUNCTIONS /////
And this script will remove all XMP metadata, but it will still retain other metadata, such as camera related data. You could run the script manually or even set up the Script Events Manager to automatically play this script whenever a file is opened. There are good reasons to keep metadata for your own use, however I understand that you may not wish to share it with others:
// https://forums.adobe.com/thread/2604316
// https://forums.adobe.com/message/10978749#10978749
#target photoshop
removeXMP();
function removeXMP() {
if (!documents.length) return;
if (ExternalObject.AdobeXMPScript == undefined) ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");
var xmp = new XMPMeta(activeDocument.xmpMetadata.rawData);
XMPUtils.removeProperties(xmp, "", "", XMPConst.REMOVE_ALL_PROPERTIES);
app.activeDocument.xmpMetadata.rawData = xmp.serialize();
}
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