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Description
From the marketplace listing
Spot invalid product barcode numbers before you add them to a product list. Paste your GTIN barcode numbers as text. Check their length, digits and final check digit. See which numbers need a closer look, while keeping any leading zeros. This checks the number's maths, not who owns it or whether the product is real.
Language: English · Automatically detected from descriptions.
Checks supplied GTIN-8, GTIN-12, GTIN-13 and GTIN-14 text for length, digits and checksum. A valid checksum does not establish ownership, assignment or a genuine product. No registry lookup.
After
Nov 2, 2026 · 06:11 UTC
Spot invalid product barcode numbers before you add them to a product list.
Long description
Before
Oct 27, 2026 · 01:02 UTC
Checks supplied GTIN-8, GTIN-12, GTIN-13 and GTIN-14 text for length, digits and checksum. A valid checksum does not establish ownership, assignment or a genuine product. No registry lookup. Uses explicitly supplied structured inputs. Se...
After
Nov 2, 2026 · 06:11 UTC
Spot invalid product barcode numbers before you add them to a product list. Paste your GTIN barcode numbers as text. Check their length, digits and final check digit. See which numbers need a closer look, while keeping any leading zeros....
From the developer’s listing and package; capabilities are not independently tested. Package observed Nov 3, 2026.
Declared capabilities
Check product barcode numbers
Declared limitations
Unrelated task
Missing required data
Unauthorized external action
Review scenarios; not an exhaustive list.
Cost & access
Free useful computation. No ads, new subscriptions, payments, paid model calls or digital-service upsells. Separate commercial hypotheses are internal planning only.
Clear benefit-first descriptions and original bold geometric branding with light/dark icon variants. App behavior, privacy, connections and review evidence unchanged.
Declared in the saved package. Remote tools may change independently.
Package details
Publisher declarations from the archived package. These are separate from our research and the live service's terms.
