Are files uploaded to a server?
No. The input file bytes are processed inside your browser. Some tools download their JavaScript libraries from public CDNs, but the files themselves are not uploaded.
Create and extract ZIP files
Enable JavaScript to use the tool.
About this tool
Create and extract ZIP files without uploading
Select your own files to bundle into one ZIP, or open an existing ZIP and download its contents individually. The tool processes archives on your own device.
Before you start
Encrypted ZIPs are not supported in the initial version. Be careful with archives received from unknown senders.
Do I need an account or a paid plan?
No. The current version is free, has no registration and runs on devices with a compatible modern browser.
Can I extract files from an existing ZIP?
Yes. Open a ZIP archive in your browser and download its contents individually, or select multiple files to create a new ZIP.
ZIP is a container for convenience, not a security boundary
ZIP archives make groups of files easier to move and can reduce size when the contents compress well. Already-compressed media such as JPEG, MP4 and many PDFs may shrink very little. The archive also preserves filenames, so review those names if they contain personal or internal project information.
Extract archives only when you trust their source. A ZIP can contain executable files, scripts or misleading filenames, and decompression can expand data substantially. Browser extraction avoids sending the archive to NowConverter, but it does not make the archive itself safe.
Practical checks
- Inspect filenames before sharing an archive externally.
- Do not expect large savings for media that is already compressed.
- Use normal endpoint security precautions with archives from unknown sources.
Practical walkthrough · zip tools
Bundle deliverables without uploading them
Example task: A client expects a ZIP containing a PDF, a PNG preview and a text readme.
Try this workflow
- Name the files clearly before selecting them for the archive.
- Create the ZIP and reopen it to confirm each expected filename is present.
- Extract to a separate folder and spot-check the contents before sharing.
What to expect
ZIP packaging combines files; media already compressed with JPEG or MP4 may show little size reduction.
When to take extra care
This version does not handle encrypted ZIP files. Do not execute unknown files extracted from untrusted archives.