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NyankoTools
日本語

ZIP Maker & Extractor

Drag and drop files to bundle them into a ZIP, or open a ZIP to see what is inside and save just the files you want. Nothing to install, and your files never leave the browser. To verify a download, try the File Hash Calculator.

🔒 Runs in your browser · Your data is never sent to a server

Drag and drop files here, or pick them with the button. Each pick adds to the list.

Added files

No files yet.

    How to use

    1. Choose "Create a ZIP" or "Open a ZIP".
    2. To create one, drop the files you want to bundle, pick a compression level and a name, then press "Create ZIP and download".
    3. To open one, drop the ZIP file into the box. Its contents are listed.
    4. Press "Save" next to a file to save just that file.

    Notes

    • Everything is processed in browser memory, so the limit is 100 MB in total and 5,000 files.
    • Creating or opening password-protected ZIPs is not supported.
    • Folder structure is not kept. Only files can be added when creating, and duplicate names get a number added (for example a (2).txt).
    • Only the last part of an entry’s path is used as the saved file name, so a ZIP containing ../ paths cannot write anywhere unexpected.

    Glossary

    ZIP

    An archive format that bundles several files into one and can compress them too. Windows and macOS open it natively, so it is a common way to send files.

    Compression level

    Higher numbers make smaller files but take longer. Files that are already compressed, such as JPEG or MP4, barely shrink.

    FAQ

    Are my files uploaded to a server?

    No. Creating and opening ZIPs happens entirely in your browser, and the files are never sent anywhere. It works offline too.

    Can it create or open password-protected ZIPs?

    Neither is supported. A password-protected ZIP is reported as unable to open. To protect the contents, encrypt the files with an encryption tool first, then bundle them.

    How large a ZIP can it handle?

    Up to 100 MB in total and 5,000 files. Everything is held in browser memory, so anything larger cannot be processed.

    Why does my ZIP barely get smaller than the original files?

    JPEG, PNG, MP4 and PDF files are already compressed, so zipping them saves little. In that case ZIP is mainly useful for bundling several files into one.

    Will file names in an extracted ZIP be garbled?

    ZIPs that store UTF-8 file names display correctly. ZIPs made on older systems with a legacy encoding (such as Shift_JIS) may show unreadable names.

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