Fletcher-16 checksum

Client

Compact Fletcher-16 for small payloads.

About Fletcher-16 checksum

Fletcher-16 over UTF-8 bytes—simple error-detection sum. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.

How to use this page

Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.

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Nearby workflows on Toolcore

  • Fletcher-32 checksum — Fletcher-32 checksum over UTF-8 bytes. when the payload needs a different encoding or escape format.
  • CRC-16 Modbus — Modbus RTU CRC-16 over UTF-8 bytes. 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.
  • 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.

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.