{"id":8807,"date":"2026-08-05T14:00:46","date_gmt":"2026-08-05T12:00:46","guid":{"rendered":"https:\/\/www.lukaswojcik.com\/blog\/?page_id=8807"},"modified":"2026-09-28T16:18:37","modified_gmt":"2026-09-28T14:18:37","slug":"ga4-ecommerce-item-array-validator","status":"publish","type":"page","link":"https:\/\/www.lukaswojcik.com\/blog\/en\/toolbox\/ga4-ecommerce-item-array-validator\/","title":{"rendered":"GA4 E-Commerce Item Array Validator"},"content":{"rendered":"<link rel=\"stylesheet\" href=\"\/blog\/wp-content\/themes\/lw-theme\/js\/items.css?v=20260928a\">\n<section data-lw-items data-lang=\"en\" data-rc-private data-mp-mask>\n<p>Check a GA4 items array before publishing an e-commerce tag. Errors, review notes and optional fields are distinguished. This is a local structural check, not proof that Google has received or processed an event.<\/p>\n<p>Processing stays in this browser tab. No Google login or upload. Tracking, session recording and chat are disabled on this tool page. Normal page-access logs remain. Downloads are saved locally.<\/p>\n<p><label for=\"lw-items-input\">GA4 items array (JSON, maximum 500,000 characters)<\/label><textarea id=\"lw-items-input\" maxlength=\"500000\" spellcheck=\"false\" autocomplete=\"off\"><\/textarea><\/p>\n<div class=\"lw-actions\"><button class=\"button\" data-run>Check items<\/button><button class=\"button\" data-demo>Load example<\/button><button class=\"button\" data-bad>Load faulty example<\/button><button class=\"button\" data-clear>Clear<\/button><button class=\"button\" data-save disabled>Download check report (JSON)<\/button><\/div>\n<div data-results aria-live=\"polite\"><\/div>\n<p>The sum excludes tax and shipping. price is the discounted unit price; discount is not subtracted again. Missing quantity defaults to 1. A missing price is optional here, but prevents a complete value calculation. currency, transaction_id, event-level value, duplicate JSON keys, event delivery and all event-specific rules are outside this array check. Custom parameter names receive a basic format check, not a complete reserved-name check. Repeated item IDs are review notes because variants can share an ID.<\/p>\n<\/section>\n<p><script src=\"\/blog\/wp-content\/themes\/lw-theme\/js\/items-core.js?v=20260928a\"><\/script><script src=\"\/blog\/wp-content\/themes\/lw-theme\/js\/items-locales.js?v=20260928a\"><\/script><script src=\"\/blog\/wp-content\/themes\/lw-theme\/js\/items-ui.js?v=20260928a\"><\/script><\/p>\n<h2>Sources<\/h2>\n<ul>\n<li><a href=\"https:\/\/developers.google.com\/analytics\/devguides\/collection\/ga4\/ecommerce\">Google: Measure ecommerce<\/a><\/li>\n<li><a href=\"https:\/\/developers.google.com\/analytics\/devguides\/collection\/ga4\/reference\/events#purchase\">Google: purchase<\/a><\/li>\n<\/ul>\n<h2>Related practical articles<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.lukaswojcik.com\/blog\/en\/digital-analytics\/tutorials\/ga4-e-commerce-in-spas-coordinating-events-and-data\/\">GA4 E-Commerce Enhanced Tracking in SPAs without DataLayer Race Conditions<\/a><\/li>\n<li><a href=\"https:\/\/www.lukaswojcik.com\/blog\/en\/digital-analytics\/tutorials\/automated-ga4-meta-capi-event-validation-in-bigquery\/\">Automated GA4 &amp; Meta CAPI Event Validation in BigQuery<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Validate GA4 e-commerce item arrays against specification rules and inspect calculated monetary totals.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":38,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-tool-base.php","meta":{"footnotes":""},"tags":[91339,91258],"class_list":["post-8807","page","type-page","status-publish","hentry","tag-e-commerce","tag-google-analytics-4"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - 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