Adler-32 checksum calculator

Calculate Adler-32 checksums for text or files to check data integrity and detect errors.

Input

Paste or type any UTF-8 text, including emoji and non-Latin characters.

Hash result

Adler-32 in hexadecimal, Base64, decimal, and binary formats.

Hexadecimal

Base64

Decimal

Binary

What is Adler-32?

Adler-32 is a fast checksum algorithm that outputs a 32-bit value, usually shown as 8 hexadecimal characters. It is designed for accidental error detection, not cryptographic security.

Key points:

  • Fast and deterministic: The same input always returns the same output
  • Integrity check: Useful for detecting corruption during transfer or storage
  • Not cryptographic: Do not use it for passwords, signatures, or tamper protection

Common uses:

  • File transfer checks
  • Archive and package verification
  • Lightweight integrity checks

How to use

Enter text or choose a file. The Adler-32 checksum is calculated automatically and shown in hexadecimal, Base64, decimal, and binary formats. Copy the format you need.