CRC32 & Checksum Calculator
Generate CRC and Adler checksums for text or data.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
This calculator computes CRC-32, CRC-32B, and Adler-32 checksums of any text — short numeric "fingerprints" produced by polynomial division (CRC) or a simple modular sum (Adler-32) that let you detect accidental changes to data. If even one bit of the input changes, the checksum almost always changes too.
Software engineers and network protocol designers use CRC-32 to verify file integrity in formats like ZIP and PNG and in Ethernet frame error-checking, while Adler-32 is used in zlib-compressed data as a faster, lower-overhead alternative. Paste your text to get all three checksums at once for comparison or debugging.
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