diff --git a/ConversationsClassic/AppCore/Actions/SharingActions.swift b/ConversationsClassic/AppCore/Actions/SharingActions.swift
index 901358a..6d8d0ee 100644
--- a/ConversationsClassic/AppCore/Actions/SharingActions.swift
+++ b/ConversationsClassic/AppCore/Actions/SharingActions.swift
@@ -5,7 +5,7 @@ enum SharingAction: Stateable {
 
     case shareLocation(lat: Double, lon: Double)
     case shareContact(jid: String)
-    case shareDocuments([Data])
+    case shareDocuments([Data], [String])
     case shareMedia(ids: [String])
 
     case checkCameraAccess
diff --git a/ConversationsClassic/AppCore/Files/FileProcessing.swift b/ConversationsClassic/AppCore/Files/FileProcessing.swift
index 582682f..9845fac 100644
--- a/ConversationsClassic/AppCore/Files/FileProcessing.swift
+++ b/ConversationsClassic/AppCore/Files/FileProcessing.swift
@@ -166,6 +166,23 @@ final class FileProcessing {
             return nil
         }
     }
+
+    // This function also creates new id for file from document sharing
+    func copyDocumentsForUploading(data: [Data], extensions: [String]) -> [(String, String)] {
+        data.enumerated().compactMap { index, data in
+            let newMessageId = UUID().uuidString
+            let fileId = UUID().uuidString
+            let localName = "\(newMessageId)_\(fileId).\(extensions[index])"
+            let localUrl = FileProcessing.fileFolder.appendingPathComponent(localName)
+            do {
+                try data.write(to: localUrl)
+                return (newMessageId, localName)
+            } catch {
+                print("FileProcessing: Error writing document: \(error)")
+                return nil
+            }
+        }
+    }
 }
 
 private extension FileProcessing {
diff --git a/ConversationsClassic/AppCore/Middlewares/SharingMiddleware.swift b/ConversationsClassic/AppCore/Middlewares/SharingMiddleware.swift
index e06b5c5..73ad01c 100644
--- a/ConversationsClassic/AppCore/Middlewares/SharingMiddleware.swift
+++ b/ConversationsClassic/AppCore/Middlewares/SharingMiddleware.swift
@@ -97,9 +97,13 @@ final class SharingMiddleware {
                 return Empty().eraseToAnyPublisher()
             }
 
-        case .sharingAction(.shareDocuments(let data)):
-            print("Sharing documents: \(data.count)")
-            return Empty().eraseToAnyPublisher()
+        case .sharingAction(.shareDocuments(let data, let extensions)):
+            return Future { promise in
+                let ids = FileProcessing.shared.copyDocumentsForUploading(data: data, extensions: extensions)
+                promise(.success(.fileAction(.itemsCopiedForUploading(newMessageIds: ids.map { $0.0 }, localNames: ids.map { $0.1 })))
+                )
+            }
+            .eraseToAnyPublisher()
 
         case .sharingAction(.shareContact(let jid)):
             if let chat = state.conversationsState.currentChat {
diff --git a/ConversationsClassic/View/Screens/Conversation/ConversationMessageContainer.swift b/ConversationsClassic/View/Screens/Conversation/ConversationMessageContainer.swift
index 2c134d9..6cbda05 100644
--- a/ConversationsClassic/View/Screens/Conversation/ConversationMessageContainer.swift
+++ b/ConversationsClassic/View/Screens/Conversation/ConversationMessageContainer.swift
@@ -1,5 +1,6 @@
 import AVKit
 import MapKit
+import QuickLook
 import SwiftUI
 
 struct ConversationMessageContainer: View {
@@ -92,6 +93,14 @@ private struct AttachmentView: View {
                     placeholder
                 }
 
+            case .file:
+                if let file = message.attachmentLocalPath {
+                    DocumentPreview(url: file)
+                        .frame(width: Const.attachmentPreviewSize, height: Const.attachmentPreviewSize)
+                } else {
+                    placeholder
+                }
+
             default:
                 placeholder
             }
@@ -175,3 +184,37 @@ private struct VideoPlayerView: UIViewControllerRepresentable {
         // Update the controller if needed.
     }
 }
+
+struct DocumentPreview: UIViewControllerRepresentable {
+    var url: URL
+
+    func makeUIViewController(context: Context) -> QLPreviewController {
+        let controller = QLPreviewController()
+        controller.dataSource = context.coordinator
+        return controller
+    }
+
+    func updateUIViewController(_: QLPreviewController, context _: Context) {
+        // Update the controller if needed.
+    }
+
+    func makeCoordinator() -> Coordinator {
+        Coordinator(self)
+    }
+
+    class Coordinator: NSObject, QLPreviewControllerDataSource {
+        var parent: DocumentPreview
+
+        init(_ parent: DocumentPreview) {
+            self.parent = parent
+        }
+
+        func numberOfPreviewItems(in _: QLPreviewController) -> Int {
+            1
+        }
+
+        func previewController(_: QLPreviewController, previewItemAt _: Int) -> QLPreviewItem {
+            parent.url as QLPreviewItem
+        }
+    }
+}
diff --git a/ConversationsClassic/View/Screens/Sharing/SharingFilesPickerView.swift b/ConversationsClassic/View/Screens/Sharing/SharingFilesPickerView.swift
index 3bf6734..5535b02 100644
--- a/ConversationsClassic/View/Screens/Sharing/SharingFilesPickerView.swift
+++ b/ConversationsClassic/View/Screens/Sharing/SharingFilesPickerView.swift
@@ -6,9 +6,9 @@ struct SharingFilesPickerView: View {
 
     var body: some View {
         DocumentPicker(
-            completion: { dataArray in
+            completion: { dataArray, extensionsArray in
                 store.dispatch(.sharingAction(.showSharing(false)))
-                store.dispatch(.sharingAction(.shareDocuments(dataArray)))
+                store.dispatch(.sharingAction(.shareDocuments(dataArray, extensionsArray)))
             },
             cancel: {
                 store.dispatch(.sharingAction(.showSharing(false)))
@@ -18,7 +18,7 @@ struct SharingFilesPickerView: View {
 }
 
 struct DocumentPicker: UIViewControllerRepresentable {
-    let completion: ([Data]) -> Void
+    let completion: ([Data], [String]) -> Void
     let cancel: () -> Void
 
     func makeUIViewController(context: UIViewControllerRepresentableContext<DocumentPicker>) -> UIDocumentPickerViewController {
@@ -44,15 +44,17 @@ struct DocumentPicker: UIViewControllerRepresentable {
 
         func documentPicker(_: UIDocumentPickerViewController, didPickDocumentsAt: [URL]) {
             var dataArray = [Data]()
+            var extensionArray = [String]()
             for url in didPickDocumentsAt {
                 do {
                     let data = try Data(contentsOf: url)
                     dataArray.append(data)
+                    extensionArray.append(url.pathExtension)
                 } catch {
                     print("Unable to load data from \(url): \(error)")
                 }
             }
-            parent.completion(dataArray)
+            parent.completion(dataArray, extensionArray)
         }
 
         func documentPickerWasCancelled(_: UIDocumentPickerViewController) {