Adler-32 is a checksum algorithm invented by Mark Adler. It's faster than CRC32 but slightly less reliable. It's used in zlib compression library, gzip, and PNG files.

Adler-32 maintains two 16-bit sums: A (sum of bytes + 1) and B (running sum of A values). The final checksum combines them as (B << 16) | A, modulo 65521.

Yes. Adler-32 is significantly faster than CRC32 because it uses simple addition instead of polynomial division. This makes it ideal for real-time compression.

Adler-32 is used in zlib, gzip, PNG format, rsync, and many compression tools. It provides a good balance between speed and error detection.

No. Adler-32 is designed for error detection in compression, not security. It's weak against intentional tampering. Use SHA-256 for security purposes.

Adler-32 produces a 32-bit (4-byte) value, shown as 8 hexadecimal characters. Example: '11E60398'.

CRC32 provides better error detection but is slower. Adler-32 is faster but may miss some error patterns. zlib uses Adler-32 for speed; gzip files use CRC32 for reliability.

Yes. All computation happens in your browser using JavaScript. Your data never leaves your device.

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