Organise

Make a ZIP file

One attachment instead of nine.

On this device

Choose what goes in

Add as many files as you like. The archive is built here, in this tab, and the total size is shown before you build it.

    Opened on this device · never transmitted

    What this tool does, exactly

    Drop the files in and get one archive back. Useful whenever something will only take one attachment, and useful on a phone, where making a ZIP is otherwise most of an afternoon.

    What it makes
    An ordinary ZIP with Deflate compression — the format every version of Windows, macOS, Linux, iOS and Android has opened without extra software for twenty years. No RAR, no 7z, and nothing that needs the recipient to install anything.
    What compresses and what does not
    Text, documents, spreadsheets and code shrink a great deal. JPEGs, PNGs, MP3s, MP4s and PDFs that are mostly photographs barely move, because they are already compressed — a ZIP of holiday photos is a ZIP of holiday photos. The result names the saving so you can see which you had.
    No password
    Deliberately. This tool does not implement encrypted ZIP. For a PDF-specific password mode, the protection tool writes AES-128 revision 4 and reports its finished-file read-back checks before offering the result.
    Where it stops
    Your device's memory, because the archive is assembled in this tab. A few hundred documents are fine; a folder of raw video is not, and you will be told rather than left watching a bar.

    About this tool

    Why is my ZIP barely smaller than the files I put in?

    Because those files were already compressed. JPEG, PNG, MP3, MP4, and most PDFs carrying photographs have had their redundancy removed already, and a second pass has almost nothing left to find. Zipping them is still worth it — you get one attachment instead of nine — but the saving will be a percent or two, and the result says so rather than implying otherwise.

    Can I put a password on it?

    No. This tool creates ordinary Deflate ZIP archives and does not add a ZIP password. If the document itself needs password protection, the PDF password tool writes AES-128 revision 4 protection and re-opens the finished file with and without the supplied password before offering it.

    Will it open on a phone?

    Yes. iOS and Android have both opened ZIP files natively for years, as have Windows and macOS. That is the whole reason this makes plain ZIPs and nothing more exotic: the point of an archive is that the person receiving it can open it.

    Are my files uploaded to build the archive?

    No. The compression and the archive assembly both happen in this browser tab. You can confirm it the same way you can confirm it anywhere else on this site: open the network panel, or disconnect after the page has loaded and watch it keep working.

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