Is my ZIP uploaded to a server?
No. The archive is read and decompressed inside your browser tab.
Unzip a file in your browser
Open a ZIP, see what is inside, download what you need. The archive never leaves your machine.
Drop files here or
Why unzipping is the one operation that must never upload
Consider what people put in a ZIP: a batch of invoices, a photo collection, source code with embedded credentials, a tax export. The archive exists precisely because the contents are bulky or private. Uploading it to a random web service so that service can hand the same bytes back is the least defensible round trip on the internet.
This tool reads the ZIP central directory in the browser, lists the entries, and extracts individual files on demand. The archive is never transmitted.
Extraction behaviour
What is handled, and where the limits are.
| Extraction behaviour | Behaviour | Notes |
|---|---|---|
| Format | ZIP | Standard deflate and stored entries. `zip`, macOS Archive Utility and Windows Explorer archives all work. |
| Browsing | Full entry list | Names, uncompressed sizes and directories are shown before you extract anything. |
| Extraction | Per file or all | Download a single entry, or every file as a new ZIP built in the browser. |
| Encrypted ZIPs | Detected, not opened | A password-protected entry reports an error instead of producing corrupt bytes. |
| Path traversal | Flattened | Entries containing `../` are written by name only, never to an outside path. |
| Limit | 10 files per batch | The desktop version has no limit. |
Common mistakes
Extracting an untrusted archive blindly
ZIPs can contain `../` paths designed to write outside the target directory. This tool flattens names, but do not run extracted executables.
Confusing ZIP with RAR or 7z
They are different formats with different compression. A corrupt-file error usually means it is not really a ZIP.
Expecting a password to be cracked
Encrypted entries cannot be opened without the password. There is no bypass here.
Assuming sizes match after re-zipping
Re-compressing files the browser already decompressed produces a different archive, usually larger.
Losing the folder structure
Flattened entries lose their directories. If structure matters, use the original archive.
Questions
Can I open a password-protected ZIP?
Not currently. Encrypted entries report an error rather than producing unreadable output.
Does it support RAR or 7z?
No, ZIP only.
Can I extract a single file without unpacking everything?
Yes, every entry can be downloaded individually.
Is the folder structure preserved?
When downloading all files, names are flattened. Use the original archive if structure matters.
How big a ZIP can it handle?
Limited by browser memory. Several hundred megabytes is realistic on a normal machine.
Will it work with a ZIP created on Windows?
Yes, Windows Explorer and macOS Archive Utility archives both open normally.
Can I re-zip the extracted files?
Yes, download all extracts them into a new archive built in the browser.
Need this without a browser tab?
FileKit Desktop runs every conversion locally as a single offline file — no 10-file limit, batch conversion, and no network connection required. One-time $19, no subscription.
See FileKit Desktop — $19