How to Corrupt a File
Need more time on a deadline? Whether it is a school assignment, a work report, or an Excel sheet you just cannot finish — corrupting your file is the oldest trick in the book. Here is exactly how to do it in under 60 seconds.
The fastest method: use Corrupt-a-File.com
This is by far the simplest approach. No software to install, no technical knowledge needed. Works on any file — Word, Excel, PDF, MP3, ZIP, anything.
- Go to corrupt-a-file.com
- Click "From your computer" and select the file you want corrupted
- Click the red "Corrupt File" button
- Download your corrupted file — it will have the same name and extension but cannot be opened
The tool works by flipping random bytes deep inside the file's data. The file looks identical on your computer (same name, same size, same icon) but throws an error when anyone tries to open it. It is completely undetectable to the naked eye.
Ready to corrupt your file right now?
Corrupt my file →Does it actually work?
Yes. Our tool modifies a small percentage of bytes in the middle section of the file — the part your application tries to parse when opening. This causes the file to fail validation without making the file obviously empty or truncated. Your boss, teacher, or client sees a file with the right name and size that simply "will not open."
What file types can I corrupt?
- Word documents (.doc, .docx) — see our corrupt Word file guide
- Excel spreadsheets (.xls, .xlsx) — see our corrupt Excel file guide
- PDF files (.pdf)
- ZIP and RAR archives
- MP3, MP4, and video files
- PowerPoint presentations (.ppt, .pptx)
- Any other file type up to 10MB
Can teachers detect a corrupted file?
Most cannot. A standard lecturer or manager opening a file on their desktop will just see an error message from Word, Excel, or their PDF viewer. They have no way to tell whether the corruption was intentional or accidental — hard drive issues, email attachment errors, and download failures cause the exact same result every day.
Some university IT systems do run automated checks, but these are rare and the checks themselves are imperfect. If you are submitting to an automated system like Turnitin or Blackboard, the system may flag the file as unreadable rather than corrupt, which still buys you time.
Is it safe to use this site?
Yes. Your file is uploaded over HTTPS, corrupted on our server, and automatically deleted within one hour. We do not store, read, or share your file contents. The corrupted file is available to download for a limited window and then wiped from our servers permanently.