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CRC32 Checksum true constellation/frac/index
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The SheetJS crc-32 library computes standard CRC32 and Castagnoli CRC32C checksums. It is a core component in ZIP file processing, powering XLSX, XLSB, ODS, NUMBERS, and other formats.

The library is also available for standalone use on the SheetJS CDN1.

Source code and project documentation are hosted on the SheetJS Git server at https://git.sheetjs.com/sheetjs/js-crc32

Live Demos

https://oss.sheetjs.com/js-crc32/ computes checksums of files and text.

https://oss.sheetjs.com/js-crc32/large uses incremental file processing and Web Workers to compute checksums of large files. Since the file is processed in chunks, it is possible to compute checksums of files larger than 4GB.

  1. See https://cdn.sheetjs.com/crc-32/ for more details. ↩︎