What This Tool Does
This tool validates a ZIP file by reading its central directory and listing every entry. You learn how many files and folders the archive contains, the total stored size, the compressed size, and whether any entry names look unsafe.
Validation reads the archive structure; it is not the same as testing the readability of every byte inside every file. For a full per-entry read test use the Test ZIP File tool, and for a summary use Zip Info.
What the Report Shows
- File and folder counts in the ZIP.
- Total uncompressed and compressed sizes.
- Number of encrypted entries, if any.
- A flag for suspicious path entries such as path-traversal names.
Step by Step
- 1
Upload the ZIP file.
- 2
Click Validate ZIP.
- 3
Read the structure report in the results panel.
- 4
Use Test ZIP File if you also need to confirm every entry is readable.
Security Note
The tool never extracts or executes anything. It inspects the archive structure only, which is exactly why suspicious entry names can be reported without any risk to your system.
Troubleshooting
- Files that cannot be read as ZIP return a clear error; they are never presented as valid.
- A valid structure does not guarantee every entry is intact, see Test ZIP File for that.
- Very large entry lists are summarized to keep the report readable.