M GTIN Finder

What it does

Most WooCommerce stores already hold their barcodes somewhere: an old _ean field, a "Barcode" attribute, a SKU that is really a UPC. This finds them, validates every one against the GS1 rules, shows you the evidence before anything is written, and writes to WooCommerce's own GTIN field so other plugins pick it up with no integration.

Features

• Background scanning over the indexed wc_product_meta_lookup column, so a large catalogue does not crawl
• Discovers barcode-shaped fields already on the store, ranked by how many values actually validate
• GS1 mod-10 check digit, GTIN-8/12/13/14 classification, ISBN-10 to 13, UPC-E expansion, stripped leading zeros recovered
• Review table with the suggestion, its source and the evidence. Approve, edit, reject or mark as legitimately absent
• Supplier CSV import with encoding detection and a dry run before any write
• Every write logged with its previous value, so any run reverts in one click
• Merchant Center preflight, plus a token-authenticated product feed in RSS, TXT and TSV

Installing it

1. Download the ZIP above.
2. In WordPress, go to Plugins → Add New → Upload Plugin, choose the ZIP and install it.
3. Activate. The defaults are safe to leave alone; everything else is optional.

Licensed GPL-2.0-or-later. No account, no licence key, no phone-home. Where a plugin can talk to an outside service, that is off until you switch it on.

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