About xlsxtocsv.net
xlsxtocsv.net is a free, browser-based data conversion site for spreadsheets and structured files. It started with one focused job, turning Excel workbooks into clean CSV files, and now also helps move data between CSV, Excel, XML, JSON, and SQL scripts without uploading files or creating an account.
Why this tool exists
CSV is the most universal data format: every spreadsheet program, database and script can read it. But existing converters often require uploads, accounts, file-size tiers, or silently merge your worksheets. We wanted converters with no sign-up, no file transfer, and honest behavior. The main XLSX to CSV converter exports every visible worksheet separately and skips hidden sheets. For other workflows, use CSV to Excel, CSV to JSON, CSV to XML, CSV to SQL, Excel to JSON, JSON to Excel, XML to CSV, XML to Excel, or XML to JSON.
Preparing a workbook for an AI tool? Read our XLSX vs CSV for Claude guide before you decide which format to upload. If Excel shows broken characters after export, the CSV encoding guide explains UTF-8, BOM, and delimiter choices.
How conversion works
- You pick a file or paste data, and it is read by JavaScript running in your browser tab.
- Spreadsheet workbooks are read locally with the open-source SheetJS library.
- CSV, XML, and JSON conversions are generated on your device, with previews before download where the tool supports it.
- Files you choose and data you paste are not sent over the network. If you explicitly load XML from a URL, your browser requests that source website directly; xlsxtocsv.net does not proxy or receive the XML.
Privacy by design
Files you select and data you paste stay in your browser. There are no accounts. We use Google Analytics to measure visitors, page views, and coarse tool interactions (conversion attempts and outcomes, download clicks, and successful copies), using fixed tool identifiers and generic error codes. Analytics cookies may be used for visitor and session measurement; advertising storage, ad personalization, and ad user data are disabled. Analytics never receives file names, worksheet names, pasted data, cell values, input URLs, or conversion output. The optional XML URL feature makes a direct browser request to the source website, which can see your IP address and the requested URL. You can verify the boundary yourself in DevTools → Network: no request carries a selected file or pasted conversion data to xlsxtocsv.net or Google Analytics.
See our Privacy Policy for the full details.
Limits & expectations
- Each converter has a clear browser-side size limit to keep conversion fast and safe on everyday devices.
- CSV stores values only — formulas, formatting, charts, images, merged cells and macros are not preserved.
- Excel-to-CSV work runs in a Web Worker. Other converters currently run in the browser's main thread, so large inputs may briefly affect responsiveness.
Contact
Questions, feedback or bug reports? Email support@xlsxtocsv.net or visit the contact page.