Create ZIP Archive

Bundle files into a ZIP without uploading them.

Create ZIP Archive packs any set of files into a standard ZIP in your browser, compressing them with the native Compression Streams API. Folder structure is preserved, and large sets are streamed so memory stays reasonable. Files never leave your device — unlike every online zip service.

This tool needs JavaScript, because the work happens on your device rather than on a server. Everything below — how it works, the FAQ and the related tools — is readable without it.

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Runs entirely on your device. No file or text you enter here is uploaded. How to verify it.

How to use Create ZIP Archive

Add files, or drop a whole folder.
Choose the compression level.
Download the ZIP.

Questions about Create ZIP Archive

How is the compression done without a library?

With the browser's built-in CompressionStream('deflate-raw'), which is the exact algorithm ZIP uses. The archive container — local headers, the central directory, CRC-32 checksums — is written byte by byte by this page.

Can I password-protect the ZIP?

Not here. Legacy ZIP encryption is trivially broken and the AES variant is not universally supported, so offering it would imply protection you would not actually have. Use Text Encryption or an encrypted disk image for real secrecy.

How large a ZIP can it make?

Bounded by your device memory and browser download limits — several hundred megabytes is comfortable on a desktop. ZIP64 is used automatically when the archive or a file exceeds 4 GB.

Do I need WinZip or 7-Zip as well?

No. Windows, macOS, Linux, Android and iOS all open a standard ZIP without extra software, and that is exactly the format written here. A dedicated archiver is worth installing only if you need password protection or formats such as 7z and RAR.

Is it safe to zip confidential documents?

The files are read into the page and compressed by your own browser, so nothing is transmitted and no copy sits on a server. The ZIP itself carries no encryption, though — treat the result as readable by anyone who receives it.

Is Create ZIP Archive really free, with no limits?

Yes. There is no account, no daily cap, no file-size tier and no watermark, because there is no server cost to recover. The site is funded by clearly disclosed partner recommendations on the Partners page, never by metering the tools.

Are my files or text uploaded when I use Create ZIP Archive?

No. Everything is processed by JavaScript running in your browser, on your device. You can verify it: open your browser's developer tools, switch to the Network tab, and use the tool. You will see no request carrying your data — because there is nowhere for it to go.