XLS to XLTX Conversion via Python Cloud REST APIs, SDKs & Apps

GroupDocs.Conversion Cloud is a reliable REST API designed specifically for Python developers who need to convert Word documents (XLS) to XLTX effortlessly. With support for over 153 document and image formats, our API allows you to integrate powerful conversion capabilities into your applications without the need for additional software like Microsoft Office or Adobe Acrobat Reader. Whether you’re working on Windows, macOS, Linux, or any other platform, GroupDocs.Conversion Cloud ensures seamless and accurate document transformations anytime, anywhere.

Our API offers unparalleled flexibility, allowing you to customize your XLS to XLTX conversions to fit your specific requirements. You can choose to convert entire documents, select specific pages, or define custom page ranges. Additionally, you have control over the output quality and resolution, enabling you to produce high-quality XLTX files tailored to your project’s standards. For added functionality, you can include watermarks or password-protect your XLTX files to ensure document security and integrity.

Security is a top priority with GroupDocs.Conversion Cloud. Every conversion request is authenticated using a unique Client ID and Client Secret, ensuring that your data remains protected throughout the process. Our robust authentication mechanisms safeguard your documents, giving you peace of mind when handling sensitive information. You can trust that your XLS to XLTX conversions are handled securely and reliably, maintaining the confidentiality and integrity of your data.

Integrating GroupDocs.Conversion Cloud into your Python applications is straightforward thanks to our comprehensive SDKs. Our Python SDK provides clear and concise documentation, along with practical examples, making it easy for you to get started quickly. Whether you’re building a simple script or a complex application, our SDKs streamline the integration process, allowing you to add XLS to XLTX conversion functionality with minimal effort. Additionally, our API Explorer tool lets you test and experiment with the API directly in your browser, helping you understand its capabilities and how to implement them effectively.


  • Convert XLS to XLTX via Free App or Java
  • Convert XLS to XLTX via Free App or Android
  • Convert XLS to XLTX via Free App or .NET
  • Convert XLS to XLTX via Free App or cURL
  • Convert XLS to XLTX via Free App or PHP
  • Convert XLS to XLTX via Free App or Node.js
  • Convert XLS to XLTX via Free App or Ruby

XLS to XLTX Conversion via Python REST APIs

Free conversion Apps for Popular Formats

XLS to HTML XLS to HTM XLS to MHT XLS to MHTML XLS to XLS XLS to XLSX XLS to XLSM XLS to XLSB XLS to ODS XLS to XLTX XLS to XLT XLS to XLTM XLS to TSV XLS to XLAM XLS to CSV XLS to FODS XLS to DIF XLS to SXC XLS to XML XLS to JSON XLS to PDF XLS to EPUB XLS to XPS XLS to TEX

How to convert XLS to XLTX

  • Select the file by clicking the XLS to XLTX App or simply drag & drop a XLS file.
  • Click the Convert button to upload XLS and convert it to a XLTX file.
  • Click on the Save button when it appears after successful XLS to XLTX format conversion.
  • That is all! You can use your converted XLTX document as needed.

Frequently Asked Questions (FAQ)

What are the benefits of using GroupDocs.Conversion Cloud Free Apps?

GroupDocs.Conversion Cloud Free Apps offer a convenient way to test and experience the conversion capabilities before committing to a subscription plan.

Are there any SDKs available for GroupDocs.Conversion Cloud APIs?

Yes, GroupDocs provides SDKs for various programming languages to help you easily integrate and use the Conversion Cloud APIs in your applications.

How secure is the conversion process in GroupDocs.Conversion Cloud?

GroupDocs.Conversion Cloud ensures a secure conversion process by encrypting data in transit and at rest, and by following industry-standard security protocols.

What file formats are supported by GroupDocs.Conversion Cloud APIs?

GroupDocs.Conversion Cloud APIs support a wide range of file formats including Word, Excel, PDF, and more. Refer to the documentation for the full list of supported formats.

How can I integrate GroupDocs.Conversion Cloud APIs into my application?

Integrate GroupDocs.Conversion Cloud APIs seamlessly with your application by following the API documentation and integration guides provided on the GroupDocs website.

How can I access GroupDocs.Conversion Cloud Free Apps?

GroupDocs.Conversion Cloud Free Apps can be accessed directly from the GroupDocs website or through the GroupDocs web or mobile applications.

Is there a limit on the number of conversions I can perform using GroupDocs.Conversion Cloud APIs?

GroupDocs.Conversion Cloud APIs offer flexible conversion limits based on your subscription plan. Contact GroupDocs support for more information on conversion limits.

Does GroupDocs provide support for technical issues related to GroupDocs.Conversion Cloud Free Apps?

GroupDocs offers technical support for Free Apps users to help resolve any issues or answer questions related to the GroupDocs.Conversion Cloud platform.

May I use GroupDocs.Conversion Cloud Free Apps for commercial purposes?

GroupDocs.Conversion Cloud Free Apps are primarily for evaluation and testing purposes. For commercial use, consider upgrading to a paid subscription plan for full features and support.

Are there any limitations to the features available in GroupDocs.Conversion Cloud Free Apps?

GroupDocs.Conversion Cloud Free Apps may have limitations on the number of conversions, file size, or output formats compared to the paid subscription plans.

How reliable is the performance of GroupDocs.Conversion Cloud Free Apps?

GroupDocs.Conversion Cloud Free Apps offer reliable performance and high-quality output for your conversion needs, ensuring a seamless experience.

What XLS to XLTX Conversion API can do?

Watermark XLS pages

Password protect XLTX output document

Convert XLS to XLTX page by page or custom range of pages

Convert XLS across all common formats

XLS conversion API explorer based on swagger collection

XLS conversion APIs are secured and require authentication

File Format Conversion

Convert documents between various file formats such as Word, Excel, PDF, and more.

Document Watermarking

Add watermarks to converted documents for branding or security purposes.

Scheduled Conversions

Schedule conversions at a convenient time to optimize resource utilization.

Document Preview

Preview documents before conversion to ensure desired output.

High-Quality Output

Maintain the quality of the converted documents with accurate formatting and layout.

OCR Support

Benefit from Optical Character Recognition (OCR) to convert scanned documents into editable formats.

Secure Conversion Process

Securely convert documents without exposing sensitive data to third parties.

User-Friendly Interface

Intuitive interface for seamless navigation and operation.

Cloud-Based Solution

Access the conversion services from anywhere with internet connectivity.

Customizable Output Formats

Choose from a variety of output formats to meet specific needs.

Configurable Conversion Options

Customize conversion settings such as conversion quality, page range, and more.

Compliance and Security

Ensure compliance with data security regulations and industry standards.

Free Apps to Get Started and convert XLS to XLTX in No Time

With GroupDocs.Conversion Cloud API, you can start converting your files right away as there is no need to install anything. The API is clearly documented and comes with SDKs and live examples for all major languages. Our GroupDocs.Conversion SDKs along with working examples hosted at Github helps our users to get started in no time.

Free Apps to Convert XLS to Multitude of Document Formats beside XLTX

GroupDocs.Conversion REST API has the capability to perform document conversions on a number of document formats. It converts accurately making sure that the details are preserved while converting the document.

Comprehensive Documentation

Access detailed documentation and support resources for easy implementation.

API Integration

Easily integrate conversion capabilities into your applications using APIs.

Collaborative Workflows

Facilitate collaboration by converting documents for sharing and editing.

API Explorer

The easiest way to try out GroupDocs.Conversion Cloud API right away in your browser is by using GroupDocs Cloud Web API explorer, which is a collection of Swagger documentation for the GroupDocs Cloud APIs.It allows you to effortlessly interact and try out every single operation our APIs exposes.

Document Metadata Preservation

Retain important metadata during the conversion process for better document management.

Security and Authentication

The GroupDocs.Conversion Cloud API is secured and requires authentication. You need to register at GroupDocs Cloud and get the app access key ID (appSID) and app secret access key. Authenticated requests require a signature and AppSID query parameters or OAuth 2.0 authorization header.

Batch Conversion

Convert multiple documents simultaneously for improved productivity.

Version Control

Maintain version control of documents through efficient conversion processes.

Scalable Performance

Efficiently convert large volumes of documents with high performance and reliability.

Free online conversion Apps for XLS

Convert unlimited documents and images using our Free online conversion Apps

Support and Learning Resources

Learning Resources

Product Support

Start Free Trial
Download GitHub Repository

Convert XLS to XLTX using SDKs in other popular languages

Convert XLS to XLTX via Free App or Java GroupDocs.Conversion
Cloud SDK for Java

Convert XLS to XLTX via Free App or Android GroupDocs.Conversion
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Convert XLS to XLTX via Free App or .NET GroupDocs.Conversion
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Convert XLS to XLTX via Free App or cURL GroupDocs.Conversion
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Convert XLS to XLTX via Free App or PHP GroupDocs.Conversion
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Convert XLS to XLTX via Free App or Node.js GroupDocs.Conversion
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