ITN format check

Client

Export declaration ID shape only.

About ITN format check

Validate 15-digit US ITN pattern. 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.

ITN shape OK: 123456789012345 (no live customs lookup)

Nearby workflows on Toolcore

  • Luhn checksum (mod 10) — Paste a digit string (spaces ignored)—pass or fail Luhn for PANs, IMEI-style IDs, and test vectors; browser-only. when another identifier column uses a different checksum ruleset.
  • 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. when another identifier column uses a different checksum ruleset.
  • VIN check digit (17-char) — North American–style vehicle ID: ninth-position mod 11 checksum, WMI and sequential split—no DMV or OEM decode API; browser-only. when another identifier column uses a different checksum ruleset.
  • IMO number checker — Seven-digit IMO ship ID—weighted mod-10 check digit; optional IMO prefix; no registry lookup; browser-only. when another identifier column uses a different checksum ruleset.

Common use cases

  • ITN format check 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.