ZIP File Viewer
List what is inside a ZIP without extracting it, with sizes and compression ratios.
Fill in the form and press “Read archive” to see the result here.
How to use it
- 1Select your file, or drag and drop it onto the upload area.
- 2Adjust the options if you need something other than the defaults.
- 3Press the button. Everything happens on your device.
- 4Download the result.
About the ZIP File Viewer
The listing is read from the ZIP central directory - the index at the end of the file - so nothing is decompressed. That makes it instant even on a very large archive and completely safe, since no entry is ever expanded.
The breakdown by file type is the quickest way to see what is actually taking up space inside an archive.
Questions people ask
Is it safe to open an archive from someone else here?
Extraction is defended against the two standard attacks: entries whose paths try to escape the extraction folder are refused outright, and entries that expand to hundreds of times their stored size are refused as decompression bombs. Nothing is executed, and nothing is uploaded. It still cannot tell you whether the files inside are malicious.
Is your file uploaded to a server?
No. This tool runs entirely in your browser using standard web APIs, so your file never leaves your device. You can confirm it by opening your browser's network panel while the tool runs, or by disconnecting from the internet after the page has loaded.
Is it free, and do I need an account?
Yes, it is free, and there is no account, no sign-up and no watermark on the result. The project is funded by optional donations.