ZIP Metadata Viewer
Analyze ZIP archives in depth and inspect compression ratio, CRC32, original size, and low-level method details for each file.
What is the ZIP metadata viewer?
The ZIP metadata viewer is a browser-based file analysis utility. It helps you inspect low-level information about a ZIP archive, including total file count, original and compressed size, average compression ratio, encryption status, compression method such as Deflate, and the operating system where files were created. Everything is analyzed locally on your device for privacy and safety.
How to view ZIP metadata?
- Import file:Drag your .zip archive into the dashed area above or click the select button to load it.
- Instant analysis:The utility instantly reads the archive structure and file header information with browser technology, without performing a full extraction.
- View results:In the results panel, you can clearly see basic statistics such as size and compression ratio, as well as advanced technical details such as compression method codes and operating system identifiers.
Frequently asked questions
Do I need to fully extract the file to view metadata?
No. ZIP archives store metadata such as directory records, sizes, and method identifiers in specific headers and central directory areas. The utility reads only those key sections, so even very large archives can usually be analyzed quickly.
Can it inspect password-protected ZIP files?
Usually yes. Most ZIP files encrypt only the file contents, not the directory and metadata areas, so you can often still view basic information such as file count and original size without the password. If the archive uses stronger protection that also encrypts the directory area, those details cannot be read directly.
What do Store and Deflate mean in compression methods?
They describe how the data was handled when the ZIP was created. Store means the file was written into the archive without additional compression, which is common for files that are already compressed, such as JPG or MP4. Deflate is one of the most common lossless compression methods and can often reduce the size of text, spreadsheets, code, and similar files.
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