Karuzip › ZIP
Open and create ZIP files online
Open a ZIP or 7z archive, or create a ZIP from your files. Everything runs in your browser, with no uploads.
The browser limit is 32 MiB in total. On Windows, the desktop app can open larger archives.
ZIP files created here are not password-protected.
Listing the files does not check their CRC. Use Test archive to check integrity.
How to extract a ZIP or 7z file
- Drop the archive onto the Extract tab or choose it from your device.
- For legacy Japanese ZIP names, choose CP932 before listing the contents. Review the filenames, then select the files you need.
- Extract the selection and save the results. If your browser starts a download, check your downloads folder for the files.
Where your files go
Karuzip serves the page and the tools it needs to run. The browser reads your archive locally. The bytes sent counter refers to your file data. Cancelling a running operation discards its partial results.
How to create a ZIP
Switch to Create ZIP and choose your files. Deflate compresses them, while Store keeps their original bytes without compression. Enter a name ending in .zip, create the archive and save it. New ZIP filenames use UTF-8.
Supported formats
ZIP files can be listed, tested, extracted and created. Supported 7z archives can be listed, tested and extracted. The browser tool does not create 7z archives or handle encrypted ZIPs, split archives or RAR extraction.
For a larger or password-protected archive on Windows, see how to open a password-protected ZIP or how to open a 7z file.
Browser limits
Inputs may be up to 16 MiB each and 32 MiB in total. An archive can contain up to 512 entries, with a folder depth of 16, an expansion ratio up to 200×, and a processing limit of 60 seconds. Processing stops if a limit is exceeded.
Frequently asked questions
Are my files uploaded?
No. ZIP creation, listing, testing and extraction run in your browser. Filenames and contents stay on your device.
Which archives can I open?
You can extract ZIP and supported 7z archives. Encrypted archives, split archives and RAR extraction are unavailable in this browser tool.
How do I create a ZIP?
Select Create ZIP, choose one or more files, enter an archive name and choose Deflate or Store. Create the ZIP, then save it to your device.
What are the size limits?
You can add up to 16 MiB per file and 32 MiB in total. The tool also checks entry count, folder depth, expansion ratio and processing time.
Can I open an old Japanese ZIP?
Yes, if the archive is supported. Choose CP932 before listing its files. The filename repair tool lets you compare CP932 and UTF-8 names before extracting.
Can I use a phone?
The ZIP engine has been tested in Chromium, Edge and Firefox on Windows 11. Physical phones have not been verified.