ZIP Info
Inspect a ZIP archive: list entries, sizes, compression ratio, and timestamps.
About ZIP Info
ZIP Info inspects an archive and reports its entries, their sizes, compression ratios, and timestamps — without extracting anything. Use it to see what's inside a ZIP, audit how well it compressed, or check entry dates before unpacking. The inspection runs in your browser, so the archive is never uploaded.
- Category
- archive
- Input
- Accepts: application/zip or application/x-zip-compressed.
- Output
- Outputs: application/json.
- Cost
- Free, runs in your browser
- Memory
- low
Common uses
- Peek inside a ZIP to confirm it contains the files you expect before extracting
- Check the compression ratio to judge whether an archive is mostly already-compressed media
- Audit entry timestamps to verify when files in a backup were last modified
- Spot unexpectedly large entries that are inflating an archive's size
- Review a downloaded archive's structure before trusting and unpacking it
- Quickly count and list the contents of a bundle handed to you by someone else
Frequently asked questions
What does the output include?
A JSON listing of each entry with its name, uncompressed and compressed sizes, compression ratio, and timestamp.
Does it extract the files?
No — it only reads the archive's directory and metadata. Use Extract ZIP when you actually want the file contents.
What archive types are supported?
Standard ZIP archives, including ones some systems label application/x-zip-compressed.
Is my archive uploaded to inspect it?
No. The listing is read locally in your browser, so the ZIP never leaves your device.
Can it inspect large archives efficiently?
Yes — reading the entry listing is lightweight because it doesn't decompress the contents, just the archive's index.
Keywords
- zip
- inspect
- info
- list
- archive
- contents
- metadata