Unpack nested ZIP archives, view compression metadata, filter file trees, and download individual files 100% locally in your web browser. Zero software installation and zero server data transfers required.
Drag & drop any .zip file into the drop zone or click "Browse ZIP File" to select an archive from your local storage.
Review the extracted directory listing, original file sizes, and compression ratios. Use the search bar to pinpoint specific files.
Click "Save" next to any specific document or image, or click "Download All Files" to save the unpacked folder collection.
Archive structures and file contents are decompressed strictly inside browser RAM, ensuring total data privacy for sensitive compressed packages.
Extract only the precise file you need without having to unpack gigabytes of unneeded archive data onto your hard drive.
Type keywords into the live search input to instantly filter through thousands of nested files within multi-level folder trees.
Decompression Mechanics & Huffman Tree Inflation: Unpacking compressed .zip archives requires parsing DEFLATE stream blocks (RFC 1951), reconstructing Huffman tree codes, and expanding LZ77 sliding window references to restore original file byte data.
Directory Tree Restoration & CRC-32 Validation: During extraction, BunchTool recreates original folder paths while validating CRC-32 checksums for every file entry. Invalid checksums flag corrupted archives before saving files to local disk storage.
100% Private In-Browser Extraction: Archive decompression occurs entirely inside client-side WebAssembly RAM. Personal document archives, confidential spreadsheets, and code repositories are unpacked locally without cloud network transfers.