ConvertAbout XLS
XLS is the older Excel 97–2003 format, for software that can't open XLSX.
| Feature | XLS |
|---|---|
| Multiple sheets | Yes |
| Formulas | Yes |
| Numbers & dates | Yes |
| Nested data | No |
| Best for | Old Excel versions |
Frequently asked questions
Is it safe to convert my files here?
Yes. Conversion happens entirely in your browser. Your files are never uploaded to a server, so nobody else can see them.
Is it free? Are there limits?
It's completely free, with no sign-up, watermarks or daily limits. The only limit is your device's memory for very large files.
Can I convert many XLS files at once?
Yes. Drop as many files as you like; they're converted one after another and you can download them all as a ZIP.
Which formats can I convert XLS to?
PDF, XLSX, CSV, TSV, XML, JSON, YAML and Markdown.