Corrupt a 7z Archive Online
Corrupt a 7z archive online for free. Destroys the signature header and packed stream index so 7-Zip cannot list or extract the contents.
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Beschädigen Sie Ihre 7z-Datei
Abgestimmt auf .7z, funktioniert aber ebenso mit jedem anderen Format.
Warum sich 7z-Dateien nur schwer richtig beschädigen lassen
7z keeps its metadata in a compressed header at the end of the file, with a small signature header at the start pointing to it. That indirection makes 7z particularly brittle once either end is damaged, and particularly reliable to break.
Was dieses Werkzeug zerstört
- The signature header. The
7z\xBC\xAF\x27\x1Cmarker and the offset it carries to the end header are destroyed. - The end header. The compressed metadata block listing every file, folder and coder is overwritten.
- The packed stream index. The structure mapping compressed streams to their contents is destroyed.
- Compressed payload. Entropy is scattered through the LZMA streams so nothing is recoverable by carving.
Was Sie danach sehen
| Anwendung | Verhalten |
|---|---|
| 7-Zip | "Cannot open the file as archive" or an unexpected end-of-data error. |
| PeaZip / Keka | Reports an unsupported or damaged archive. |
7z l | Fails with "Headers Error" and a non-zero exit code. |
| Windows Explorer | No preview and no extraction option beyond a generic error. |
Häufige Gründe dafür
- Testing an extraction service against malformed archives.
- Verifying a software distribution pipeline validates its packages.
- Simulating a partially downloaded archive for a retry-logic test.
- Checking that unpacking failures are reported rather than silently skipped.
So beschädigen Sie eine 7z-Datei
- Ziehen Sie Ihre .7z-Datei in das Feld oben, oder klicken Sie zum Auswählen.
- Belassen Sie die Stufe auf Standard, sofern Sie nicht nur teilweisen Schaden wollen (Light) oder Wiederherstellungssoftware überwinden müssen (Heavy).
- Klicken Sie auf Datei beschädigen. Die Verarbeitung läuft auf Ihrem Gerät und ist daher fast sofort fertig.
- Laden Sie das Ergebnis herunter. Standardmäßig behält es den ursprünglichen Dateinamen und die Byte-Länge.
Häufige Fragen zu 7z
Why is 7z easy to break?
Because it stores its file listing in a compressed header at the end and reaches it through an offset at the start. Damage either and the archive has no map of itself.
Does 7-Zip have a repair mode?
Not a real one. Unlike RAR it has no recovery records, so a damaged 7z is generally unrecoverable, which is why this tool is so effective on it.
Are encrypted 7z archives supported?
Yes. Encryption protects the contents, but the signature and end headers we target sit outside it.
Will the archive size change?
Not by default. The output is byte-for-byte the same length as the original.