Temporary storage
Originals are removed after processing.
Convert XLS to XLSX online
Upload a supported file up to 1 GB, choose a compatible output, and download the result. Files are removed automatically after processing.
File converter
Upload a XLS file
3–10 minute downloads
The exact time is based on storage use when each result is ready, then remains fixed.
Compatible outputs
Only valid targets are offered for each input.
Format guide
About XLS to XLSX conversion
FileFy reads the XLS content with its matching parser and writes a compatible XLSX result. Complex layout may be simplified.
How it works
- Select a XLS file.
- FileFy uploads and converts the file.
- Download the XLSX result.
File handling
The original upload is removed after processing. Each result receives a storage-based expiry period of 3 to 10 minutes when processing completes. Once assigned, that period is not shortened afterward.