FileTranslator › XLS to XLSX
Convert XLS to XLSX
The binary XLS format is over twenty years old, and modern tools increasingly refuse it — while old archives, accounting exports and legacy systems keep producing it.
Drop XLS files here
or
Output is pre-set to XLSX — you can change it per file after adding.
About XLS to XLSX conversion
Your XLS is read and rewritten as a modern XLSX workbook that opens cleanly in current Excel, Google Sheets, LibreOffice and every import pipeline.
How to convert XLS to XLSX
- Drop your XLS files onto the box above, or click Choose files.
- The output format is already set to XLSX — adjust it per file if you need something else.
- Click Convert, then download your XLSX files (or everything as one ZIP).
Free, no account, no watermarks — and because the conversion runs in your browser, your files are never uploaded to a server.