Combine individual documents, images, scripts, and media into a clean ZIP file directly inside your web browser. Configure DEFLATE algorithms or STORE modes with zero cloud uploads or file count caps.
Drag and drop multiple files onto the staging area or click "Browse Files" to pick documents, images, or assets from your computer.
Select DEFLATE compression level (1-9) or STORE mode, and enter your desired output .zip filename for seamless organization.
Click "Create ZIP" to assemble the archive locally in memory and download your finished package with full savings breakdown.
All file reads and ZIP assembly happen in browser memory using JSZip, protecting sensitive documents from external network exposure.
Fine-tune DEFLATE compression levels from 1 to 9 for text and code, or select STORE mode to package pre-compressed media rapidly.
Assign custom package names on the fly so your generated ZIP download integrates seamlessly into your file management workflow.
Binary File Archiving & Directory Header Construction: Creating a new Zip archive requires building structured binary headers for each file entry: Local File Headers (storing filename length, modification timestamp, and CRC-32 checksums), compressed payload chunks, and a Central Directory catalog for rapid file access.
Customizing Compression Levels & Directory Nesting: Configure zip creation parameters to balance compression speed against final file size. BunchTool supports multi-level directory tree preservation and custom archive file naming for clean distribution.
100% Private In-Browser Zip Creation: File uploads, binary stream compilation, and zip file generation occur 100% inside local browser RAM tab memory via JSZip WebAssembly scripts. Files are never sent over external network connections.