Fletcher-16 checksum
ClientFletcher-16 over UTF-8 bytes—simple error-detection sum.
Fletcher-16: 0x2D16
Nearby workflows on Toolcore
- CRC-16 checksum — CRC-16/CCITT-FALSE on UTF-8 bytes—local digest. when the payload needs a different encoding or escape format.
- Adler-32 checksum — RFC 1950 Adler-32 on UTF-8 text—decimal and hex output for zlib-style checksum checks in your browser. when the payload needs a different encoding or escape format.
- CRC-8 checksum — CRC-8 with polynomial 0x07 on UTF-8 bytes—local digest byte. when the payload needs a different encoding or escape format.
- File checksum & hash — SHA-256, SHA-512, MD5, CRC-32, and more for a local file—verify downloads without uploading. when the payload needs a different encoding or escape format.
About this tool
Fletcher-16 pairs two running mod-255 sums.
Common use cases
- Fletcher-16 checksum for quick local checks without uploading data.
- Copy results into tickets, docs, or classroom notes.
Common mistakes to avoid
Unexpected input shape
See the intro and how-to notes for accepted formats.
FAQ
Is processing local?
Yes—this runs entirely in your browser.
Agent prefill?
Use q or qb for the main text field when supported.
More tools
Related utilities you can open in another tab—mostly client-side.
CRC-16 checksum
ClientCRC-16/CCITT-FALSE on UTF-8 bytes—local digest.
Adler-32 checksum
ClientRFC 1950 Adler-32 on UTF-8 text—decimal and hex output for zlib-style checksum checks in your browser.
CRC-8 checksum
ClientCRC-8 with polynomial 0x07 on UTF-8 bytes—local digest byte.
File checksum & hash
ClientSHA-256, SHA-512, MD5, CRC-32, and more for a local file—verify downloads without uploading.