---
title: CRC32 Checksum
hide_table_of_contents: true
---

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 CDN[^1].

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


[^1]: See <https://cdn.sheetjs.com/crc-32/> for more details.