Is a ZIP password secure?

Not very. ZIP's original encryption can be broken with enough known content, and the names inside are visible to anyone. It keeps casual eyes out. A 7z with a password is AES-256 with the names hidden, which is secure in the ordinary sense.

Can I zip a whole folder?

Yes: drag the folder onto the dropzone, or press Browse folder. Every file inside it is listed with its path, and the archive keeps that structure, so unpacking it gives the folder back.

Why is the archive bigger than I expected?

Because the files were already compressed. Photos, videos, PDFs and Office documents are compressed inside, and no archive format shrinks them much further; a ZIP of JPEGs is about the size of the JPEGs. Text, code and raw data compress well.

Create Archive

Pack files or a whole folder into a ZIP, 7z or tar, in your browser, with a password if you like. Nothing is uploaded.

Drop files or a folder here

Any files, or a whole folder with its subfolders; up to 500 MB in all. They are packed here and never uploaded.

About this tool

Packs files, or a whole folder with everything in it, into a ZIP, 7z, tar, tar.gz, tar.bz2 or tar.xz, in your browser. Drop files one at a time or a folder at once, add more, take some out, name the archive, pick the format and the compression level, and set a password if it is a ZIP or a 7z. The engine is 7-Zip compiled to WebAssembly, so the archive it writes is exactly what 7-Zip on a desktop would write, and the files never leave your device.

How to use it

1Drop files or a folder. Each file is listed with the path it will have inside the archive, and the dropzone stays open for more.
2Choose the format and the compression level; add a password for a ZIP or a 7z.
3Press Create and download the archive, or send it to the extractor to check it.

Good to know

ZIP or 7z

ZIP opens everywhere, with nothing installed, and is the choice for anything you send to someone else. 7z makes smaller files, often half the size, and encrypts properly, but the other end needs 7-Zip, or one of the unarchivers that read it, most of which are free. tar and its compressed forms are for Unix and Linux, where they keep permissions and are what the tools expect.

Two kinds of password

A ZIP password uses the format's classic encryption, which opens in every unzip tool but is weak and leaves the file names readable. A 7z password is AES-256 and, as written here, hides the names as well, so nothing about the contents shows without it. For anything that matters, use 7z.

How big, and how long

Up to 500 MB of files, since they are read and packed in this tab's memory. On a laptop ZIP at Balanced packs about ten megabytes a second, 7z about four, and Best is several times slower than either; a tar with no compression is near instant. The file is read into memory by your own browser and processed there, so it is never uploaded and never reaches a server.