Corrupt an Excel Spreadsheet Online
Corrupt an Excel spreadsheet (.xlsx or .xls) online for free. Client-side XLSX corrupter that breaks the workbook package so Excel cannot repair it.
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Excel dosyanızı bozun
.xlsx, .xls, .xlsm için ayarlandı ve diğer tüm biçimlerde de aynı şekilde çalışır.
Excel dosyalarını düzgün bozmak neden zordur
An .xlsx workbook is a ZIP archive of XML parts: worksheets, a shared string table, styles, relationships. Excel is unusually good at recovering from partial damage, so a handful of random flips normally produces a workbook that opens with a warning and all the data intact. To make it genuinely unreadable, the archive itself has to go.
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- ZIP entry headers. Every local file header inside the package is destroyed, including
xl/workbook.xmland each worksheet part. - Central directory and EOCD. The archive index and its terminating record are overwritten, so the file no longer registers as a ZIP container.
- Relationship parts. The
_relsentries binding worksheets to the workbook are caught by the same pass. - Legacy .xls. Older BIFF workbooks are handled through their OLE compound header and FAT sector map.
Sonrasında ne göreceksiniz
| Uygulama | Davranış |
|---|---|
| Microsoft Excel | "Excel cannot open the file because the file format or file extension is not valid." |
| Google Sheets | Import fails with an unsupported-file error. |
| Numbers on macOS | Refuses to import the workbook. |
| pandas / openpyxl | Raises BadZipFile, useful for testing error handling in data pipelines. |
Bunu yapmanın yaygın nedenleri
- Testing an ETL job that ingests spreadsheets and must not crash on bad input.
- Confirming a finance or reporting tool shows a message rather than a stack trace.
- Generating malformed workbooks for an automated test suite.
- Demonstrating why version history and backups matter during training.
Excel dosyası nasıl bozulur
- .xlsx dosyanızı yukarıdaki kutuya bırakın veya seçmek için tıklayın.
- Kısmi hasar (Light) istemiyorsanız ya da kurtarma yazılımını alt etmeniz (Heavy) gerekmiyorsa seviyeyi Standard bırakın.
- Dosyayı boz düğmesine basın. İşlem cihazınızda yapılır, bu yüzden neredeyse anında biter.
- Sonucu indirin. Varsayılan olarak özgün dosya adını ve bayt uzunluğunu korur.
Excel hakkında sık sorulanlar
Will Excel offer to recover the workbook?
It may offer, but recovery fails at Standard level and above. The container index is destroyed, so Excel cannot locate a single worksheet part to salvage.
Does it work on macro-enabled files (.xlsm)?
Yes. .xlsm uses the same package format as .xlsx and is handled identically.
What about CSV files?
CSV is plain text, so the engine switches to injecting invalid UTF-8 sequences throughout. Use the dedicated CSV corrupter for that.
Is there a file size limit?
None imposed by us. Processing runs in slices, so large workbooks are handled without exhausting memory.