xls.repair guides & articles
11 in-depth guides on XLS Repair and related topics.
Repair Excel how-to
Repair Excel how-to
How to Use Excel's Built-In Open and Repair Feature
A precise walkthrough of Excel's Open and Repair command, its two modes, and what to do when it fails.
Repair Excel how-to
How to Repair a Corrupted Excel File: A Practical Guide
A practical, honest guide to repairing a corrupted Excel file. Learn what an xlsx actually is, how a rebuild recovers your cells, and when a backup beats a repair.
Repair Excel how-to
Repairing XLS vs XLSX: What's Different and What to Expect
XLS and XLSX are built on completely different formats, so they corrupt and repair differently. Learn what sets them apart and why a repair returns a clean xlsx.
Why Excel files corrupt
Why Excel files corrupt
Excel File Corrupted on a USB or Network Drive: What to Do
Editing Excel directly on a USB stick or network share is a common cause of corruption. Learn why it happens, how to recover the file, and the safer workflow.
Why Excel files corrupt
Why Excel Files Get Corrupted (and How to Prevent It)
Excel files rarely corrupt for no reason. Learn the real causes, from interrupted saves to failing drives, how each damages an xlsx, and how to prevent and repair them.
Excel error messages
Excel error messages
Fix "Excel Cannot Open the File Because the Format Is Not Valid"
The "file format or extension is not valid" error stops Excel opening your workbook. Learn what it means, how a rebuild fixes it, and when the extension is just wrong.
Excel error messages
Fix "We Found a Problem With Some Content" in Excel
Excel warns it found a problem with some content and offers to recover it. Learn what the message means, how to answer the prompt, and how a rebuild clears it.
Preventing spreadsheet loss
Recovering spreadsheet data
Recovering spreadsheet data
How to Recover an Excel File After a Failed Download
An interrupted download often leaves an Excel file that won't open. Learn how to tell a truncated file from a fixable one, and the fastest route to a working workbook.
Recovering spreadsheet data
Recover Excel Data With a CSV Export When Repair Falls Short
When a workbook is too damaged for a full rebuild, extracting to CSV rescues the raw values. Learn how a CSV export recovers your data and rebuilds a clean file.
Recovering spreadsheet data
How to Recover an XLSX File That Won't Open
An xlsx that refuses to open is usually recoverable. Learn how to diagnose the cause, rebuild the workbook, and rescue the raw values when the file is badly damaged.