Checksum Calculator
Calculate CRC32, Adler-32 and 16-bit checksums in hex or decimal.
The Checksum Calculator computes CRC-32, Adler-32 and a simple 16-bit checksum for any text input. Results can be copied in hexadecimal or decimal for quick integrity checks.
Please enter some input.
How to use
- Choose an algorithm and output format.
- Paste the text to check into the input field.
- Compare the result with the value provided by the source system.
Frequently asked questions
What is a checksum used for?
Checksums detect accidental changes in data, such as corrupted downloads or modified configuration values.
Are the values standard?
CRC-32 and Adler-32 follow their widely used definitions, while the 16-bit sum is the simple byte-sum of the input.
Related tools
JSON Formatter
Format, validate and minify JSON in one place.
XML Formatter
Pretty-print and indent XML documents.
YAML Formatter
Format YAML and convert between YAML and JSON in both directions.
CSV to JSON
Convert CSV tables into JSON data.
JWT
Encode, decode and verify JSON Web Tokens locally.
Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes.