I’ve put together a spreadsheet for SEO schema checks here:

https://docs.google.com/spreadsheets/d/1dDqJ9_qrTVoJOZRxieJDp9XE3Q1TCq4ixNVudVtgp2M/edit#gid=0

Use https://classyschema.org/Visualisation and import a URL – test using different URLs, especially for eCommerce websites – like homepage, about page, product page, category pages

Test also with:

https://search.google.com/test/rich-results – add any issues in column C of sheet

and

https://validator.schema.org/ – add issues in Column D

• Put your “to do” list in columns E and F

When using validator, make sure you’re schema has all the relevant parameters.

The separate sheets on the Google Sheet linked above, has some examples for you to check against – written in JSON-LD

Finally, if the site is already live, check the schema reports in Search Console for any errors

If you have Screaming Frog, I’d also recommend running a crawl –

Go to Configuration – Spider – Crawl – and tick all the “Structured Data” boxes:

Then when the crawl has run – go to Reports – Structured Data and download each report

Finally, you can also check individual pages using the Ryte Structured Data Helper for Chrome –

Check with CHrome plugin – Ryte structured data helper

https://chrome.google.com/webstore/detail/ryte-structured-data-help/ndodccbbcdpcmabmiocobdnfiaaimgnk/related