EAN check digit (lite)

Client

GS1 EAN-13 mod-10 check digit.

EAN-13 check digit

Computes mod-10 check for twelve-digit body input—does not verify GS1 company prefix assignment. Processing runs in your browser—Toolcore does not need your paste for the core operation on this page.

Checksum and format rules only—no live registry or carrier lookup.

How to use

Paste or type in the main field, then read the output below. Use Load example when available, or open the page with ?q= / ?qb= so tickets and agents share the same input.

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Nearby workflows on Toolcore

  • GTIN checksum (EAN / UPC) — Paste GTIN‑8, UPC‑A (GTIN‑12), EAN‑13, or logistic GTIN‑14 digits—ISO GS1 modulus‑10 parity without GS1 lookup—browser-only. Useful when another column uses a different identifier ruleset.
  • EAN-13 barcode check — Validate 13-digit EAN/GTIN check digit for retail barcodes. Useful when another column uses a different identifier ruleset.
  • ISBN validate & convert — ISBN-10 / ISBN-13 checksums and 978↔ISBN-10 conversion—book identifiers only, no title lookup; browser-only. Useful when another column uses a different identifier ruleset.
  • UPC check digit (lite) — Compute UPC-A check digit for 11-digit body. Useful when another column uses a different identifier ruleset.

Common use cases

  • EAN check digit (lite) 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.