XLS File — Open & Convert .xls Online
What Is a .xls File?
XLS (.xls) is a spreadsheet file format. XLS is the legacy Microsoft Excel binary format. Created by Microsoft, this format is essential for analysts and accountants.
How to Open .xls Files
Upload your .xls file to OpenAnyFile and instantly view and filter it in your browser. No software installation required. Works on Windows, macOS, Linux, iPhone, and Android.
Everything About XLS Files
Popular XLS Conversions
Frequently Asked Questions
What is a .xls file?
A .xls file is a spreadsheet format called XLS. XLS is the legacy Microsoft Excel binary format.
How do I open a .xls file without installing software?
Upload your .xls file to OpenAnyFile. Our browser-based tool instantly detects and displays it — no downloads needed.
What program creates .xls files?
.xls files are typically created by Microsoft.
Can I convert .xls to another format?
Yes. OpenAnyFile converts .xls to XLSX, CSV, JSON, TXT, ODS.
Is it safe to open .xls files online?
Yes. OpenAnyFile processes files in a secure, isolated environment. Files are automatically deleted and all transfers use HTTPS.
Can I open .xls on my phone?
Yes. OpenAnyFile works on all mobile browsers including iPhone and Android.