Online Adler-32 Hash Generator
A fast 32-bit checksum used in zlib/DEFLATE. Paste your text and click the button to compute its Adler-32 hash — everything runs on your device and is never sent to a server.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
hello world
Example Output
1a0b045d
How to Use
- 1Type or paste the text you want to hash into the Input field.
- 2Click the Generate Hash button (or press Ctrl+Enter) to compute the Adler-32 hash.
- 3The Adler-32 hash appears in the Output field. Click Copy to copy it to your clipboard.
- 4Click Clear to empty the fields and start over.
About Adler-32
Adler-32 is a 32-bit checksum created by Mark Adler, the author of zlib. It was designed to be faster to compute than CRC32 while still giving adequate error detection for many cases.
How it works: Adler-32 combines two running sums modulo 65521 (the largest prime below 2^16) — one sums the bytes, the other sums the running totals. The two values are combined into a 32-bit checksum.
Adler-32 is used in the zlib and DEFLATE compression formats (e.g. inside PNG and gzip). Being non-cryptographic, Adler-32 is only for error detection — not security. For very short data, Adler-32 is less reliable than CRC32.
FAQ
Adler-32 or CRC32?
Adler-32 is usually faster to compute, but CRC32 generally provides better error detection, especially on short data. Choose based on your speed-vs-reliability needs.
How long is a Adler-32 hash?
A Adler-32 hash is 32-bit long (8 karakter heksadesimal / 8 hexadecimal characters).
Is my data sent to a server?
No. The Adler-32 hash is computed entirely in your browser. The text you enter never leaves your device.