# Convert MS Office (DOCX, XLSX, PPTX) to PDF in Swift for iOS Convert an MS Office file (DOCX, XLXS, PPTX) to PDF using Document Engine with our Office file conversion component. Get additional resources by visiting our guide on [MS Office Converter for iOS](/guides/ios/features/office-conversion.md). [Get Started](https://www.nutrient.io/sdk/ios/getting-started.md) [All Samples](https://www.nutrient.io/guides/ios/samples.md) [Download](https://www.nutrient.io/guides/ios/downloads.md) [Launch Demo](https://www.nutrient.io/demo/) --- ```swift // // Copyright © 2020-2026 PSPDFKit GmbH. All rights reserved. // // The Nutrient sample applications are licensed with a modified BSD license. // Please see License for details. This notice may not be removed from this file. // import PSPDFKit import PSPDFKitUI class OfficeDocumentConversionExample: Example { override init() { super.init() title = "Office File Conversion" contentDescription = "Shows how to convert an Office file to PDF using Nutrient Document Engine." category =.documentProcessing priority = 15 } override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController? { let controller = OfficeDocumentPickerTableViewController(style:.grouped) controller.title = self.title return controller } } /// Shows UI to pick an Office file for conversion. private class OfficeDocumentPickerTableViewController: UITableViewController { private static let cellReuseIdentifier = "document picker table view cell" override func viewDidLoad() { super.viewDidLoad() #if!os(visionOS) tableView.keyboardDismissMode =.onDrag #endif tableView.cellLayoutMarginsFollowReadableWidth = true tableView.register(UITableViewCell.self, forCellReuseIdentifier: OfficeDocumentPickerTableViewController.cellReuseIdentifier) } struct OfficeDocument { let fileName: String let fileExtension: String let jwt: String let displayName: String } struct Section { let header: String? let rows: [OfficeDocument] let footer: String? } /// Data to show in the table view. private lazy var sections: [Section] = { /// We need a JWT corresponding to each document we want to convert. These will be used to authenticate the /// document conversion request by the server. /// /// JWTs for Office file conversion need two claims: /// 1. `exp` claim which sets the deadline for the token validity. (Unix seconds since epoch timestamp) /// 2. `sha256` claim containing the SHA-256 of the Office file you are planning to convert. /// /// For more details regarding JWTs, check out our guide here: /// https://www.nutrient.io/guides/web/pspdfkit-server/client-authentication/#special-notes-for-mobile-document-conversion /// /// In this example, we have hardcoded the JWTs corresponding to the Office files which we are trying to convert. /// These JWTs will be valid only for the default public/private key pair in our server example, so if you are using /// a different public/private key pair for Nutrient Document Engine, these JWTs will need to be re-generated. Also note that /// these hardcoded JWTs are valid only for converting the specific files in our example and will need to be /// re-generated if you wish to convert other documents. let documents = [ OfficeDocument(fileName: "Mars Surface", fileExtension: "docx", jwt: "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjk5OTk5OTk5OTksInNoYTI1NiI6IjU3OWVhY2IxMzZmYzE0NTg0MDZhOTNjMzQxOWY3ZTkxZTYxNWMzZDFkYTM1YTc4MTkxNzg5ZWE5YWE4YzJhOGMifQ.ENAT4TwjTk9dBNGb_dVd_Nzk2TqpRFLEQVJui_7702PPbnVYBXgQ_RYfbckS6_5iJofENxxIOGUboxqLQGLKtA", displayName: "Word document (.docx)"), OfficeDocument(fileName: "Art Museums", fileExtension: "xlsx", jwt: "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjk5OTk5OTk5OTksInNoYTI1NiI6IjFlMzVmMjlhOGQyM2E5NjdhZGIzZjhmNjg0NWY2MGQwYjI3OWI1NmJmMTAxN2M5ODI0ZmJiM2EwMmE2NmUwNTIifQ.DmdimV2ZCbKC6B0OfzhsLGHteBKXajokgl0hMN4b0_BFAVyNBqCp556lcWnKxnYMWJfziIyODT4RDMdoQfnZaA", displayName: "Excel document (.xlsx)"), OfficeDocument(fileName: "Data Sampling", fileExtension: "pptx", jwt: "eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjk5OTk5OTk5OTksInNoYTI1NiI6ImVmYmUyNWVjNzUyMTE0NzkxMjMyMTFhZDFjY2E1YjZiN2U5MTlmMmIxNmQxYzgxNTBkMzIyYmI1Yjc3N2MyM2QifQ.BOMUjkrF1jgu5tKBqn-xhHXvGS6u4kxr_MTFI8TZwsGROy1nP0a95TDESWPf0JDhhl80U1KUUuZUw4n-xsUahA", displayName: "Powerpoint document (.pptx)") ] return [ Section(header: "Office file conversion powered by Nutrient Document Engine", rows: [], footer: "NOTE: This example needs a local instance of Nutrient Document Engine which supports running Office file conversion. Steps to setup the local server can be found at: https://www.nutrient.io/guides/ios/features/office-conversion/. If using a non-local Nutrient Document Engine, change the server URL appropriately."), Section(header: "Office file examples", rows: documents, footer: "The original Office files used in this example can be found in the Samples directory.") ] }() override func numberOfSections(in tableView: UITableView) -> Int { return sections.count } override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { return sections[section].rows.count } override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { let row = sections[indexPath.section].rows[indexPath.row] let cell = tableView.dequeueReusableCell(withIdentifier: OfficeDocumentPickerTableViewController.cellReuseIdentifier, for: indexPath) cell.textLabel?.textColor = tableView.tintColor cell.textLabel?.font = UIFont.preferredFont(forTextStyle:.headline) cell.textLabel?.text = row.displayName return cell } override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? { return sections[section].header } override func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? { return sections[section].footer } override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { let identifier = sections[indexPath.section].rows[indexPath.row] convertAndPresentDocument(withIdentifier: identifier) } private func convertAndPresentDocument(withIdentifier identifier: OfficeDocument) { /// NOTE: This example needs a local instance of Nutrient Document Engine which supports running Office file conversion. /// /// Steps to setup the local server can be found at: https://www.nutrient.io/guides/ios/features/office-conversion/ /// /// If using a non-local Nutrient Document Engine, change the server URL appropriately. guard let serverURL = URL(string: "http://localhost:5000/i/convert_to_pdf") else { handleError(message: "The server URL could not be resolved.", pop: false) return } guard let officeFileURL = Bundle.main.url(forResource: identifier.fileName, withExtension: identifier.fileExtension, subdirectory: "Samples") else { handleError(message: "The source file could not be loaded.", pop: false) return } // Create a temporary file URL for the converted file. let outputURL = FileHelper.temporaryPDFFileURL(prefix: "Converted") // Start the conversion. let conversionOperation = Processor.generatePDF(from: officeFileURL, serverURL: serverURL, jwt: identifier.jwt, outputFileURL: outputURL) { [weak self] _, error in if let error { self?.handleError(message: error.localizedDescription, pop: true) } } /// We use a `CoordinatedFileDataProvider` pointing at the outputURL to read the file once it gets converted. /// It is not necessary to use a `CoordinatedFileDataProvider` here, we can also just directly create a document /// from the `outputURL` once the conversion operation completes. Using a `CoordinatedFileDataProvider` here has /// the benefit that it gives us the progress reporting UI for free. You can also create your own progress reporting /// UI by listening to changes on the `conversionOperation.progress.fractionCompleted` property. let provider = CoordinatedFileDataProvider(fileURL: outputURL, progress: conversionOperation?.progress) let document = Document(dataProviders: [provider]) let controller = PDFViewController(document: document) navigationController?.pushViewController(controller, animated: true) } private func handleError(with title: String = "Document Conversion Error", message: String, pop: Bool) { let alert = UIAlertController(title: title, message: message, preferredStyle:.alert) alert.addAction(UIAlertAction(title: "Dismiss", style:.default, handler: { _ in // The Office file cell might still be selected. Deselect so we can start over. if let tableView = self.tableView, let selectedIndex = tableView.indexPathForSelectedRow { tableView.deselectRow(at: selectedIndex, animated: true) } if pop { self.navigationController?.popViewController(animated: true) } })) navigationController?.present(alert, animated: true, completion: nil) } } ``` This code sample is an example that illustrates how to use our SDK. 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