Convert XLS to XLSX online
Turn older XLS spreadsheets into modern XLSX files for easier editing, sharing, and broader office compatibility.
Best for This Workflow
- Converting older Excel spreadsheets into modern XLSX files
- Preparing legacy spreadsheet archives for office reuse
- Normalizing XLS files for collaboration and review
- Converting repeat legacy spreadsheet jobs into XLSX
Pro Workflow
If you modernize lots of legacy spreadsheets, Pro is better for larger uploads, repeat cleanup workflows, and faster queue priority.
Why Convert XLS to XLSX?
XLS belongs to older Excel workflows, but XLSX is usually the more practical format when you want better compatibility, easier collaboration, and more modern office handling. XLS to XLSX is a practical cleanup route for archives, reports, and spreadsheet normalization.
This page gives users a direct path from older Excel files into modern spreadsheet output without relying on separate desktop spreadsheet software.
How It Works
- Upload your XLS spreadsheet.
- Choose XLSX as the output format.
- Convert and download the finished XLSX file.
This page opens the converter with the right workflow already selected, so users can move from guide to tool without rebuilding the route manually.
What Usually Changes After Conversion
XLS to XLSX is usually about switching between fixed-layout and editable document formats.
For office-style workflows, a clean export path and less manual rework are usually more valuable than advanced tuning.
Workflow Fit
Mode
This landing page is optimized for a direct single-file route, while batch remains available when the workflow grows.
Supported on FileConvertHQ
Single-file and batch routes both make sense here, which is useful when the same conversion shows up across repeat work.
Why FileConvertHQ Fits This Workflow
Better current compatibility
XLSX is usually easier to edit, review, and share in modern spreadsheet workflows than older XLS files.
Useful for spreadsheet cleanup
XLS to XLSX is practical when older spreadsheet archives need to be modernized.
Good repeat workflow
Teams with legacy spreadsheet libraries can use this as a simple normalization route.
Free vs Pro for This Workflow
Free
Good for quick one-off conversions when the job is simple and you only need to finish the route once.
Pro
Better for repeat work, larger files, stronger batch usage, account-backed history, and saved presets.
Saved Workflow Value
The value of Pro grows when XLS to XLSX comes up often enough that you want the route remembered, not rebuilt.
Ready to Convert?
Open the converter with this workflow preselected, or move to Pro when this job becomes part of a larger repeat process.
Frequently Asked Questions
Why convert XLS to XLSX?
XLSX is often easier to use in current spreadsheet workflows than older XLS files.
Is this useful for legacy spreadsheet cleanup?
Yes. XLS to XLSX is practical when older spreadsheets need to be modernized for editing and sharing.
Can I batch convert XLS files?
Yes. Batch document workflows can support larger spreadsheet cleanup jobs.
Are uploaded files deleted after conversion?
Yes. FileConvertHQ is built around automatic file deletion after processing.
Keep This Workflow Moving
Start with the converter now, then upgrade when you want stronger repeat-workflow features like presets, billing, and account-backed history.