A complete, high-quality listing carries a descriptive title (most marketplaces allow up to ~200 characters), a brand, a full description (aim for 200+ characters), the bullet points the platform allows (Amazon allows up to five and recommends using every one), multiple images (at least one main image on a pure-white background, with five to seven plus a video recommended), a unique product identifier — a GTIN of 8, 12, 13 or 14 digits (UPC/EAN/ITF) or an MPN, a category / product type, and a numeric price. On top of those, each category has its own required and recommended attributes: Apparel & Accessories require color, size, material, gender and age group; electronics benefit from model, power, connectivity, dimensions, weight and certifications; beauty, health and food need ingredients, net quantity, directions, warnings/allergens and shelf life. AnyTool checks all of these per category, marks each present, missing or quality-warning, and lists what to fix first.

The score is a weighted percentage: every attribute carries a weight by importance (required highest, then recommended, then optional) and earns credit for being present and passing its quality rule. Fields that simply need a value give full credit when filled. Rule-bearing fields are also graded for quality: a title should be 50–200 characters, there should be at least five bullet points and at least five images (with the main image on a white background), the description should be 200+ characters, the product identifier should be a valid GTIN of 8/12/13/14 digits or an MPN, and the price should be a positive number. When such a field is present but below the recommended target — a 30-character title, three bullets, two images, a 90-character description, a non-standard identifier length — it earns partial credit and shows as a quality warning, so “present” alone does not guarantee a full score. The result is honest about thin data rather than rewarding a box merely being non-empty.

Required attributes differ across Amazon, Google Merchant Center, eBay, Etsy, Walmart and other channels, and within each they differ by category and by country — for example, color and size are required for apparel on Google Merchant in several countries, and many categories require a GTIN. The specifications also change over time. AnyTool’s checker encodes common, well-documented best-practice attributes and quality rules drawn from sources like Amazon’s Listing Quality Dashboard guidance and the Google product data specification, but it is rule-based and explicitly NOT official and NOT affiliated with any marketplace. A 100% in the tool is a strong baseline, not a guarantee of approval or ranking, so you should always confirm your platform’s current category-specific required attributes (the Amazon flat file / category requirements, the Google Merchant product data specification, or your channel’s docs) before publishing.

The checker uses deterministic, rule-based logic — category attribute templates plus quality thresholds — with no AI or LLM involved, and it is not affiliated with or endorsed by Amazon, Etsy, eBay, Walmart, Google Merchant Center or any marketplace. Everything runs locally in your browser: the title, brand, bullets, description, image count, identifier, price and every category-specific attribute you enter (or paste via the CSV/key:value importer) are processed on your device and never sent to a server, logged or stored, and the page works offline once cached. That is the deliberate contrast with PIM or “listing audit” tools that require an account or upload your whole catalog. Because requirements vary and change, the tool is explicit that you should confirm your platform’s current category-specific spec, and that a perfect score is a baseline rather than a guarantee.