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Corrupt a File

DataDeveloperTesting

Free online tool to corrupt files by changing random bytes. Adjust corruption levels, process multiple files, and maintain safe zones - all directly in your browser.

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INPUT

OUTPUT

Client Side

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Guide

What is the Corrupt a File?

The File Corruption Tool allows you to deliberately corrupt files by changing random bytes within the file data. This tool processes files locally on your device, ensuring your data never leaves your computer. The corruption process makes files unreadable by randomly modifying a specified percentage of the file’s bytes.

Key Features

Client-side processing – All files remain on your device and are never uploaded to any servers
Adjustable corruption level – Set corruption percentage from minimal to complete
Batch processing – Corrupt up to 10 files at once (max 100MB each)
Safe zone protection – Option to maintain critical file sections uncorrupted
Instant download – Get all corrupted files in a single download

How the Tool Works

The file corruption tool works by:

Reading the file’s binary data
Randomly selecting bytes based on your corruption percentage
Replacing those bytes with random values
Creating a new corrupted version of the file

When to Use This Tool

Scenario	Description
Deadline extension	Create a temporarily unreadable file when you need more time on assignments
Testing recovery	Test file recovery software with corrupted samples
Software testing	Check how applications handle corrupted files
Security testing	Test system responses to malformed files

How to Use

Drop files into the upload area or click “Browse” to select files
Set corruption amount using the slider (default: 10%)
Toggle “Maintain Safe Zones” if needed
Click “Corrupt Files” button
Download all corrupted files using the “Download All Files” button

Understanding Corruption Levels

Higher corruption percentages result in more severe damage to the files. The corruption level represents the approximate percentage of bytes that will be randomly modified.

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Important Notes

Corrupted files cannot be automatically repaired
There is no guaranteed way to recover severely corrupted files
For testing purposes, always keep backups of your original files
The “Maintain Safe Zones” option preserves critical file header sections
This file corruption tool is provided for educational and testing purposes only. By using this tool, you acknowledge that:
- Corrupted files cannot be automatically restored to their original state
- We accept no responsibility for any data loss resulting from the use of this tool
- Using corrupted files to misrepresent work completion or to gain deadline extensions may violate academic or professional integrity policies
- All file processing occurs locally on your device, and we do not access, store, or transmit your files
- Always maintain backups of original files before using this tool

Use at your own risk. We recommend using this tool only for legitimate testing and educational scenarios.

 FAQ

Can a corrupted file be recovered?

Recovery depends on the corruption level. Files with minor corruption (lower percentages) might be partially recoverable using specialized recovery software. However, files with high corruption percentages are typically beyond recovery.
What's the difference between corrupting and encrypting a file?

Corruption randomly changes bytes in a file, making it permanently damaged and unreadable. Encryption transforms data using an algorithm and key, allowing it to be decrypted back to its original state when needed.
How can I tell if a file is corrupted?

Corrupted files typically won't open in their associated programs, or they'll display errors, show garbled content, or crash the application. File verification tools using checksums can also detect if a file has been modified.
Can corrupting a file damage my computer?

No, corrupting a file using our tool only affects the specific file you process. It cannot damage your computer's hardware or operating system. The corruption is limited to the file's data itself.
What does the "Maintain Safe Zones" option do?

The "Maintain Safe Zones" option preserves critical sections of the file (typically header information) during corruption. This can make the file appear valid at first glance while still being unreadable, which might be useful when you want the file to be recognized by its associated program but not fully accessible.