ZIP Extractor (Unzip Online)

Got a .zip you cannot open, or only need one file out of it? This extractor reads the archive inside your browser and lists everything in it: path, size, packed size and date. Every file can be downloaded on its own or together. It also fixes a classic problem: ZIPs made on older Korean or Japanese Windows store names in CP949 or Shift_JIS without saying so, which shows up as garbled names elsewhere; here the encoding is detected, or you choose it. Nothing is uploaded.

How to use this tool

1. Choose the ZIP file (or a .docx, .epub, .apk, .cbz and other ZIP-based files).
2. Optionally type a filter such as *.jpg or a folder name to extract only some files.
3. Check the table: each entry shows whether it was extracted, skipped or protected.
4. Download single files, or all extracted files with "Download all as ZIP".

Formula

Archive = local file entries + central directory + end record (PKWARE APPNOTE). Each file: method 0 (stored) or 8 (Deflate), checked with CRC-32 and size.

The file list is read from the central directory at the end of the archive, including ZIP64 archives over 4 GB and self-extracting files with a program in front. Names flagged as UTF-8 are read as UTF-8; others are tried as UTF-8, then Korean CP949, Japanese Shift_JIS, Chinese GBK and Big5, and one encoding that reads every name is used for the whole archive. Every file is checked against its stored CRC-32 and size before you can download it. Paths that try to leave the archive's folder (../, a leading / or a drive letter such as C:) are cleaned. Password-protected entries (ZipCrypto or AES) and rare methods such as Deflate64, BZIP2, LZMA or Zstandard are listed but not extracted. To keep the tab responsive, one run extracts at most 500 files or 1.5 GB.

Example

A photo archive trip.zip of 48 MB holding 120 JPEGs in a folder 사진/ made with an older Korean Windows tool: the names are detected as Korean (CP949), all 120 files pass their CRC check, and the table lists them with dates. Typing *.jpg in the filter skips the __MACOSX copies; "Download all as ZIP" repacks them with UTF-8 names.