CRC-8 checksum

Client

Single-byte CRC over pasted text using polynom 0x07—verify embedded firmware frames.

About CRC-8 checksum

CRC-8 with polynomial 0x07 on UTF-8 bytes—local digest byte. 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.

CRC-8 (0x07): 0xF4

Nearby workflows on Toolcore

  • CRC-32 & CRC-32C — IEEE CRC-32 and Castagnoli CRC32C on UTF-8 text or raw hex bytes—ZIP/PNG family vs iSCSI/protobuf; local only, complements file checksum for whole-file digests. when the payload needs a different encoding or escape format.
  • LRC checksum (8-bit) — Longitudinal redundancy check—two's complement of sum mod 256. when the payload needs a different encoding or escape format.
  • ASCII byte sum — Sum char codes of a string mod 256—simple checksum toy. 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

  • CRC-8 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.