# Free tools by catalogaudit

> Free tools for Shopify merchants: AI crawler checker, Structured data tester, GTIN checker, Title checker, Category finder, Feed validator. Each answers one question about your catalog for Google Shopping and AI shopping agents, free, with no signup.

- [AI crawler checker](https://catalogaudit.app/ai-crawler-checker.md): Is ChatGPT blocked from your store? Free check: does your robots.txt block ChatGPT, Perplexity, Claude or Google's AI crawlers? See allowed or blocked per crawler, the exact lines responsible and the fix.
- [Structured data tester](https://catalogaudit.app/structured-data-tester.md): What do Google and AI agents read on your product page? Free test: paste a product page and see the structured data Google and AI shopping agents read (price, stock, brand, GTIN, variants). On Shopify, we compare it with your live price and stock.
- [GTIN checker](https://catalogaudit.app/gtin-checker.md): Are your barcodes valid GTINs? Validate up to 500 GTIN, UPC, EAN and ISBN-13 barcodes for free. Check digits, lengths and common errors before using product identifiers in Shopify.
- [Title checker](https://catalogaudit.app/title-checker.md): Does your product title break Google's rules? Free Google Shopping title checker: length, promotional words, ALL CAPS, size lists and brand, tested against Merchant Center's rules. Optionally get an AI rewrite that passes the same checks.
- [Category finder](https://catalogaudit.app/category-finder.md): Which category does your product belong in? Free product category finder: type a product name and get the matching Google product category and Shopify standard category, with IDs, from the official taxonomies. No AI, instant.
- [Feed validator](https://catalogaudit.app/feed-validator.md): Will Google accept your product feed? Free Google Merchant Center feed validator: upload a CSV or TSV product feed (5 MB) and get every per-row problem, a summary and a downloadable problem list. Never stored.
- [Agent check](https://catalogaudit.app/agent-check): Can ChatGPT buy from your store? We query your store's agent catalog (UCP) the way ChatGPT and other AI shopping agents do, and show exactly what they receive for one product.

## More

- [Free full audit](https://catalogaudit.app/#audit): runs every check on a Shopify store's flagship products and rebuilds the five worst, free
- [Every check](https://catalogaudit.app/checks): the rules behind the scores, each linked to the tool that tests it
- Talk to us: hello@catalogaudit.app