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---
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title: CRC32 Checksum
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hide_table_of_contents: true
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pagination_prev: constellation/frac/index
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---
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2023-11-07 03:08:55 +00:00
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<head>
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<script src="https://cdn.sheetjs.com/crc-32-1.2.3/package/crc32.js"></script>
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</head>
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2023-10-30 23:28:40 +00:00
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The SheetJS `crc-32` library computes standard CRC32 and Castagnoli CRC32C
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checksums. It is a core component in ZIP file processing, powering XLSX, XLSB,
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ODS, NUMBERS, and other formats.
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The library is also available for standalone use on the SheetJS CDN[^1].
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Source code and project documentation are hosted on the SheetJS Git server at
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https://git.sheetjs.com/sheetjs/js-crc32
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#### Live Demos
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https://oss.sheetjs.com/js-crc32/ computes checksums of files and text.
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https://oss.sheetjs.com/js-crc32/large uses incremental file processing and
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Web Workers to compute checksums of large files. Since the file is processed in
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chunks, it is possible to compute checksums of files larger than 4GB.
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[^1]: See https://cdn.sheetjs.com/crc-32/ for more details.
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