Google Shopping Feed Validator

It reads your file's headers (CSV or tab-separated, either works) and checks every row against Google's product data specification: the columns Merchant Center requires, and the formats it expects for each one.

• Required columns: id, title, description, link, image_link, availability, price. A feed missing any of these is flagged before rows are even checked.
• id: present, unique, and 50 characters or under.
• title: present, 150 characters or under (longer titles get truncated).
• link and image_link: present and a full URL starting with http:// or https://.
• availability: one of in_stock, out_of_stock, preorder or backorder.
• price: a number and a currency code, like 24.00 USD.
• gtin: passes the GS1 check-digit test when present; a warning if neither gtin nor mpn is set and identifier_exists isn't marked false.
• condition: new, refurbished or used when the column is used.

This only validates the file itself. Merchant Center also checks your website: that prices on the landing page match the feed, that HTTPS works, and that your store meets its policies. Passing this check doesn't guarantee approval, but it clears out the errors that block a feed before it's even reviewed.