Duplicate Schema Syntax

[GoogleAlgoServant]

Is having both JSON and Microdata markup on one site detrimental to SEO? I'm unsure if Google would read it as spammy to have both.

[Xiano]

Google's Gary Illyes has specifically stated that it wouldn't be a problem when someone else asked the same question:

"Is there an issue (ie. spammy structured markup manual action) with marking up the same content using both JSON-LD & microdata?"

Gary Illyes (@methode)

"no, that shouldn't be a problem"

https://twitter.com/methode/status/793628458928578560

Is there an issue (ie. spammy structured markup manual action) with marking up the same content using both JSON-LD & microdata?17Gary "鯨理" Illyes@methodeReplying to@jenstarno, that shouldn't be a problem

[Paddy_Moogan]

Hi Christine,

As Alex said, this shouldn't be a problem. I'd just advise keeping things consistent where you can, if only from a maintenance/debugging perspective so that if something breaks, it's easier to diagnose.

You should also make sure that markup is consistent between mobile and desktop sites if you have separate sites or change content based on each one.

Cheers.

Paddy

[GoogleAlgoServant]

Thank you for digging that up, Alex!

[GoogleAlgoServant]

Thanks, Paddy!