01
ZIP File Creator
Packs any set of files into a single .zip archive inside your browser, with a choice of…
ZIP Contents Viewer
Lists every file inside a .zip with its size, compressed size, saving and date, without extracting anything or uploading the archive.
Developer
Nothing uploaded
No sign-up
Free, unlimited
Drop a .zip fileor click to choose — nothing is extracted or uploaded
Add a file to begin.
In short
ZIP Contents Viewer is a free online tool on inputtesthub.com that lists every file inside a .zip with its size, compressed size, saving and date, without extracting anything or uploading the archive. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.
How to use the ZIP Contents Viewer
- Drop in the .zip file.
- Read the entry list, sizes and compression column.
- Use the ZIP Extractor if you decide you want the files.
About the ZIP Contents Viewer
The ZIP Contents Viewer lists every file inside a .zip with its size, compressed size, saving and date, without extracting anything or uploading the archive. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Checking what an archive holds before extracting it.
- Finding which file in an archive is taking all the space.
- Reading the file list of an encrypted archive you cannot open.
Details
| Reads | The central directory only — a few kilobytes, however large the archive |
|---|---|
| Shows | Path, uncompressed size, stored size, saving and modification date |
| Encrypted archives | Names and sizes still list; contents do not |
| Extraction | None — nothing is decompressed |
The saving column is worth reading before you compress anything again. If most entries show near zero, the archive is full of media or documents that carry their own compression, and no zip setting will improve it.
Where this tool stops
Reads .zip only. Sizes come from the archive's own directory, so a corrupt or truncated archive may list entries it cannot actually produce.
Frequently asked questions
How can it list a huge archive so quickly?
A ZIP keeps a directory of its contents at the <b>end</b> of the file — names, sizes, dates and offsets, all in one place. Listing an archive reads that directory and nothing else, so a two-gigabyte file lists as fast as a two-kilobyte one.
It listed the files in an encrypted archive. Is the password broken?
No, and this surprises people. Standard ZIP encryption protects the <b>contents</b> of each file, not the directory, so the names, sizes and dates stay readable to anyone. If a filename is itself sensitive, a ZIP password does not hide it.
Why is one file showing 0% saved?
It was stored rather than deflated, or it is a format that will not compress. Both are normal. A zip decides per file, so an archive can mix stored and compressed entries.
Does the ZIP Contents Viewer cost anything?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the utility.
Can you see what I put into this utility?
No. The ZIP Contents Viewer runs entirely in your browser using JavaScript. Your input never reaches inputtesthub.com or any third party — open your browser's Network tab while you use it and you will see no request go out.
What do people use the ZIP Contents Viewer for most?
In practice it gets used for three things: checking what an archive holds before extracting it. Finding which file in an archive is taking all the space. Reading the file list of an encrypted archive you cannot open. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Where does the ZIP Contents Viewer stop being reliable?
Reads .zip only. Sizes come from the archive's own directory, so a corrupt or truncated archive may list entries it cannot actually produce. Knowing where a tool stops being trustworthy matters more than the cases where it works.
What are the key numbers for the ZIP Contents Viewer?
Reads is The central directory only — a few kilobytes, however large the archive. Shows is Path, uncompressed size, stored size, saving and modification date. Encrypted archives is Names and sizes still list; contents do not. These are printed on the page itself, so you do not have to take them on trust.
Will a big file be rejected?
There is no limit set by us, because your file is never uploaded — the only ceiling is the memory your own browser will give the tab. Very large files simply take longer to process, and a phone will give up sooner than a desktop.
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