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Private archive inspection

ZIP File Viewer

View ZIP filenames, folders, declared sizes, compression ratios, and safe text previews before extracting anything.

Free to use Archive inspection runs entirely on this device. No ZIP, entry, filename, or preview content is sent to Lucaden.

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How it works

Complete the job in three clear steps

  1. Choose a standard unencrypted ZIP archive.
  2. Search its normalized file list and review size, type, ratio, and path-safety details.
  3. Preview supported entries or export a CSV inventory before deciding what to download.

Important

Check the result before relying on it

Keep an untouched copy of important source files. Browser processing depends on available device memory, and you should inspect every downloaded result before deleting the original.

Practical details

What this Lucaden tool does

The viewer parses the ZIP central directory without eagerly expanding every entry, so you can inspect an archive before spending memory on its contents.

Declared compressed and uncompressed sizes support a practical expansion-ratio report, while normalized paths and an inventory CSV make archive review easier to document.

Included capabilities

  • Searchable entry inventory
  • Compressed and expanded sizes
  • Expansion-ratio report
  • Safe text/image previews
  • CSV inventory export

Useful for

  • Audit an archive
  • Find a file by name
  • Review delivery contents
  • Document ZIP structure

Questions

About this tool

Which files can be previewed?

Small UTF-8 text/code/data files and common PNG, JPEG, GIF, or WebP images can be previewed. Other types remain downloadable data only.

Can it open password-protected ZIPs?

No. JSZip does not decrypt encrypted archives, and Lucaden does not ask for or transmit archive passwords.

Keep going

Related Lucaden tools

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Open-source foundations

Built transparently

Lucaden documents its standards sources, architectural references, and permissive runtime dependencies while keeping this workspace consistent with the Lucaden interface.

JSZip 3.10.1MIT option from dual MIT OR GPL-3.0-or-later sourceThird-party noticesLicenses and attribution