Create a ZIP archive
Bundle multiple files into a single ZIP archive directly in your browser. Choose compression level and download instantly.
🗜️
Select files
Pick any files — up to 500MB total.
Max file size: 500MB • Multiple files allowed
or drag and drop · press Enter to browse
How to Use
- Select the files you want to compress.
- Add more files if needed.
- Choose a ZIP name and compression level (0=stored, 9=maximum).
- Click Create ZIP to download the archive.
- Verify the output file in your device's download folder.
- You can adjust settings and process new files immediately without any restrictions.
All processing is done in your browser, and files are never sent to a server.
Frequently Asked Questions
About 500MB total before the browser runs out of memory. Smaller batches are recommended.
Files are flattened to the root of the archive. Drag-and-drop from the OS does not preserve folder paths in browsers.
No. JSZip does not support password encryption. If you need security, encrypt the resulting ZIP with a dedicated tool.
No. All operations are processed entirely inside your browser's local sandbox using client-side APIs (like WebAssembly, pdf-lib, or HTML5 Canvas). Your files and data never leave your device.
The tool is completely free with no usage limits. However, since processing occurs in your browser's memory, we recommend keeping file sizes under 50MB (especially for heavy files like PDFs or videos) to ensure stability.
No. All tools on ConvertBox are 100% free. We do not insert watermarks, limit features, or require any registration or payment.
Yes. Once the page and its local library dependencies are loaded in your browser, the conversion logic runs completely offline without needing an active internet connection.