Easy
PDF Won't Open: How to Fix a PDF That Refuses to Load
Practical fixes for PDFs that won't open, ranked from zero-effort diagnostic to command-line repair. Covers the common causes and when to stop trying.
Practical guides for damaged files
Step-by-step repair, recovery, and conversion guidance for PDF, Excel, Word, and archive formats. No fluff, no marketing — just the fix.
Repair, recovery, and conversion guides for damaged PDF files.
Open the PDF guide →Excel
Repair guides for damaged .xlsx, .xlsm, and legacy Excel files.
Open the Excel guide →Word
Repair guides for damaged .docx and legacy Word documents.
Open the Word guide →Archive
Repair and recovery guides for ZIP, RAR, 7Z, and TAR archives.
Open the Archive guide →Browse guides
Filter by file format, then pick the closest match to your problem.
Moderate
Excel Crashes When Opening a File
Excel crashing on file open is usually an add-in conflict, a graphics driver issue, or a damaged Office install. Diagnose and fix in order.
Moderate
Fix "The file is corrupt and cannot be opened" Error in Word
Word reports a file is corrupt and cannot be opened. Step-by-step strategies to recover the document, ordered by success rate, plus the underlying causes.
Moderate
Fix "The archive is either in unknown format or damaged" Error
How to fix the "archive is either in unknown format or damaged" error in 7-Zip and WinRAR. Causes, diagnostics, and step-by-step fixes ranked by success rate.
Easy
Fix PDF "Cross-reference table not found" Error
What "cross-reference table not found" means in a PDF, why readers report it, and how to rebuild the xref. Covers qpdf, Acrobat, and Ghostscript paths.
Easy
Excel File Opens But Shows Empty Sheets
Why Excel opens to a blank window or empty workbook, and how to recover the data. Covers hidden windows, DDE settings, and damaged shared strings.
Easy
Fix "Word experienced an error trying to open the file"
When Word reports it experienced an error trying to open a file, the cause is usually a security block, not corruption. Diagnostic steps and fixes in order.
Moderate
ZIP Files Created on Windows Won't Extract on Mac (and Vice Versa)
Cross-platform ZIP problems: garbled filenames, unwanted .DS_Store files, encoding mismatches, and the tools that handle each scenario correctly.
Easy
PDF From Email Won't Open: How to Fix Corrupted Attachments
Fixes for PDF email attachments that won't open. Covers transport corruption, Outlook temp folder issues, and when to ask the sender to resend.
Tool guide
Complete Guide to qpdf for PDF Repair and Transformation
A practical reference for qpdf, the free command-line PDF tool. Installation, recipes for repair, merge, split, rotate, and encrypt, plus honest limitations.
Tool guide
Complete Guide to Stellar Repair for Excel
A practical reference for Stellar Repair for Excel: when it's worth using, how to install and run it, what the demo limits, pricing, and honest free alternatives.
Tool guide
Complete Guide to 7-Zip for Archive Recovery
A practical reference for 7-Zip — installation, extraction recipes, integrity testing, and what to do when an archive is damaged. Covers ZIP, 7Z, RAR, and TAR.
Most common problems
What's breaking right now
The errors people search for most often — pick the closest match to your file.
- PDF
PDF Won't Open: How to Fix a PDF That Refuses to Load
- Excel
Excel Crashes When Opening a File
- Word
Fix "The file is corrupt and cannot be opened" Error in Word
- PDF
Fix PDF "Cross-reference table not found" Error
- Excel
Excel File Opens But Shows Empty Sheets
- Archive
ZIP Files Created on Windows Won't Extract on Mac (and Vice Versa)
- PDF
PDF From Email Won't Open: How to Fix Corrupted Attachments
- PDF
"File Is Damaged and Cannot Be Repaired": How to Fix This PDF Error
The recovery methodology
File repair isn't magic. It's a structured process of identifying structural damage and extracting the data that survived.
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Diagnose Structure
Inspect file headers, magic numbers, and metadata to identify the format and scope of the damage before touching the contents.
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Attempt Repair
Use format-specific tools — qpdf, openpyxl, LibreOffice, 7-Zip — to rebuild reference tables, container indexes, and cross-reference streams.
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Extract Payload
When structural repair fails, strip the damaged container and recover the surviving text, images, or data streams from what's left.
Looking for a specific tool? Browse tool reference guides →