Are my archive files uploaded anywhere?

No! All byte slice inspection runs 100% locally in your browser.

ZIP File Inspector

Inspect file contents inside ZIP archives without extracting.

Document & Archive Studio

Document & Markup Converter

MARKDOWN / HTML INPUT

CONVERTED PLAIN TEXT OUTPUT

Sample Document Heading

This is a sample text formatted with bold, italics, and a list:
• First Item
• Second Item
• Third Item

About ZIP File Inspector

The ZIP Archive Header & Metadata Inspector analyzes `.zip` archive structures without full decompression, reading central directory headers, compression ratios, CRC-32 checksums, uncompressed byte sizes, and file creation timestamps.

Step-by-Step Guide

How to Use ZIP File Inspector

Step 1

Upload any `.zip` file.

Step 2

Inspect the detailed table of files, sizes, and compression ratios.

Step 3

Click "Export CSV Report" or copy technical metadata.

Industry Scenarios

Practical Use Cases for ZIP File Inspector

Auditing Archive Contents Before Extraction

Inspect file lists and compression ratios of large ZIP archives to verify contents and check for zip bomb expansion risks before extracting.

Forensic Metadata & Integrity Auditing

View low-level ZIP header properties, compression algorithms (Deflate vs BZIP2), and CRC-32 checksums for forensic file verification.

Sample Data & Transformation

Input & Output Examples

Inspecting `dataset.zip`

Input Sample:

Uploaded `dataset.zip` (Compressed: 15.4 MB)

Processed Result:

Archive Summary: 42 Files | Uncompressed Size: 84.2 MB | Compression Ratio: 81.7% | Algorithm: Deflate | CRC-32 Verified

Technical Capabilities

Key Features & Performance

✓Reads ZIP Central Directory without extracting full file payloads.
✓Displays per-file metadata: Compressed Size, Uncompressed Size, Compression %, CRC32, Last Modified Date.
✓Calculates total archive compression efficiency and identifies largest files.
✓100% Client-Side memory execution.
✓1-Click Export CSV file inventory report.

Technical Glossary

Key Terminology & Definitions

Central Directory (ZIP)

A structured metadata table located at the end of a ZIP file containing the directory index, filenames, and byte offsets for all entries in the archive.

Compression Ratio

The percentage reduction in file size achieved by compression: $(1 - \\text{CompressedSize} / \\text{UncompressedSize}) \\times 100$.

Frequently Asked Questions (PAA)

ZIP File Inspector FAQs

Because the inspector only reads the small header index at the end of the file, allowing instant inspection of gigabyte-sized archives in milliseconds.