10 tools · Free · On-device
Document File Corrupter Tools
Office documents and PDFs are the formats people most often need broken, and the hardest to break convincingly. Word, Excel and PowerPoint files are ZIP packages with built-in recovery; PDFs rebuild their own cross-reference tables. These tools destroy the container and index structures those recovery paths depend on.
PDF PDF Corrupter .pdf DOCX Word Corrupter .docx .doc .docm XLSX Excel Corrupter .xlsx .xls .xlsm PPTX PowerPoint Corrupter .pptx .ppt .pptm TXT Text File Corrupter .txt .log .ini .conf RTF RTF Corrupter .rtf ODT ODT Corrupter .odt .fodt ODS ODS Corrupter .ods .fods ODP ODP Corrupter .odp .fodp EPUB eBook Corrupter .epub .mobi .azw3 .azw
Each tool at a glance
- PDF Corrupter .pdf
The %PDF- header. The first bytes declare the format and version. Overwriting them means the file is no longer recognised as a PDF at all. - Word Corrupter .docx, .doc, .docm
Local file headers. EveryPK\x03\x04record that marks the start of an entry inside the package is destroyed. - Excel Corrupter .xlsx, .xls, .xlsm
ZIP entry headers. Every local file header inside the package is destroyed, includingxl/workbook.xmland each worksheet part. - PowerPoint Corrupter .pptx, .ppt, .pptm
Package structure. Local file headers, the central directory and the EOCD record of the presentation package are all destroyed. - Text File Corrupter .txt, .log, .ini, .conf
Invalid UTF-8 sequences. Bytes in the0x80–0xFFrange are injected without valid lead bytes, which is a decoding error rather than a strange character. - RTF Corrupter .rtf
The \rtf1 header. The opening{\rtf1declaration is destroyed, so the file is no longer identified as RTF. - ODT Corrupter .odt, .fodt
The mimetype entry. ODF requires an uncompressedmimetypeentry as the first item in the archive. Destroying it breaks format detection immediately. - ODS Corrupter .ods, .fods
The package index. Local file headers, the central directory and the EOCD record are destroyed, so the archive cannot be enumerated. - ODP Corrupter .odp, .fodp
The archive index. Local file headers, the central directory and the EOCD record are all destroyed. - eBook Corrupter .epub, .mobi, .azw3, .azw
EPUB container. Themimetypeentry,META-INF/container.xml, the central directory and the EOCD record are all destroyed.
About these documents tools
Every tool listed here runs the same engine. The dedicated pages exist because each format fails differently and it is worth knowing what to expect, which application shows which error, whether a repair feature will rescue the file, and what survives at each damage level.
What they have in common
- Nothing is uploaded. Every byte is processed in your browser.
- No size limit. Files are handled in 8 MB slices.
- The output looks normal. Same filename, byte length and MIME type.
- Four damage levels. From partial damage to cryptographic noise.