Calculate Fletcher-16 from text. The algorithm keeps two modulo-255 sums and combines them into a 16-bit result.
Fletcher-16 is compact and older than many CRC profiles. It can still appear in legacy formats and embedded examples.
Text is encoded as UTF-8 before the checksum runs. Non-ASCII text may not match a tool that treats the same characters as Latin-1 or another encoding.
Fletcher-16 returns a 16-bit checksum, usually written as 4 hexadecimal characters.
Paste text into the input pane. Batch mode calculates one Fletcher-16 value per line.
No. Fletcher-16 is an error-detection checksum, not a cryptographic hash.
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