Convert legacy XSL to OpenDocument format. Maintain the most accurate formatting of text, formulas, charts, and images.
Accepted formats: .xls
Size up to 100MB
Files deleted automatically
Secure upload (SSL)
Convert your XLS workbook to ODS in 3 simple steps. Fast, secure, and free.
Drag & drop your .xls file or click "Choose File". Maximum size: 100MB.
Click on 'Convert' and wait for your file to finish converting.
The converted file will be automatically downloaded in your browser
We use LibreOffice, a trusted open-source office suite, to open legacy XLS files and convert them to ODS reliably - without you installing anything.
ODS is a spreadsheet format designed for open standards. We preserve sheets, formatting, charts, images, and formulas when supported. Some Excel-only features may look slightly different, depending on the app you use to open the ODS file.
No registration required. Convert files up to 100MB, and temporary files are cleaned up automatically after conversion.
A simple overview of the features and benefits of the formats
XLS is a binary spreadsheet format created by Microsoft for Excel. It was the default file format before being replaced by XLSX in 2007. XLS files support cell data, formulas, charts, and macros, making them widely used for budgeting, reporting, and data analysis. Despite being a legacy format, XLS files can still be opened in modern versions of Excel, as well as in Google Sheets, Apple Numbers, and LibreOffice Calc.
ODS is an open-source spreadsheet format developed by OASIS. ODS files are created using the Calc application found in LibreOffice and Apache OpenOffice. The format allows users to organize data in tables, cells, and rows, create charts, apply complex formulas, and store macros for task automation. As a non-proprietary standard, ODS is compatible with a wide range of spreadsheet programs, including Microsoft Excel and Google Sheets.
Quick answers about XLS to ODS conversion, compatibility, and privacy.
Yes. You can convert XLS to ODS for free with no subscriptions.
On average, the process of converting XLSX to ODS takes no more than 10 minutes with a light server load.
ODS is the OpenDocument Spreadsheet format (ODF). It's a great choice for LibreOffice/OpenOffice and for workflows that prefer open standards.
Yes. We keep cell styles, borders, number formats, and formulas. Some Excel-specific elements may look slightly different in ODS depending on the app used to open the file.
Yes. Multi-sheet workbooks are preserved. Charts, images, and shapes are transferred when supported by the target format and the converter engine.
No. ODS does not support Excel VBA macros, so macro code won't be preserved in the converted file.
You can upload and convert XLS files up to 100MB.
Yes. ODS is the default spreadsheet format for LibreOffice Calc and works well in OpenOffice and other ODF-compatible suites.
Yes. Uploads are protected with SSL encryption, and files are automatically deleted after conversion.
Our Desktop Converter handles large volumes without online restrictions