JSON error when adding data markup to header code

Shopify Discussion

Topic summary

Issue: Structured data (JSON-LD) added to a Shopify product page throws an error.

Key cause and fix:

  • The code was placed in a .json file; it must go inside a theme .liquid template (e.g., product.liquid or main-product.liquid) as a block.
  • JSON (data format) ≠ JSON-LD (linked data format). In Shopify, output JSON-LD via Liquid.
  • If applying to only certain products, wrap the JSON-LD in conditional logic. Screenshots shared show where to insert it under the main product section.

Implementation cautions:

  • Do not paste sample code with hard-coded values (e.g., fixed price $229.95). Use dynamic Liquid variables for price, availability, and reviews to avoid SEO issues.

Additional suggestions:

  • Store lacks a review input; install a reviews app to enable review rich results (real reviews required). A tool was promoted to auto-generate structured data and other SEO tasks.
  • A quick check for the “Coco-Lube” product shows the site ranking 7th with only price rich result; adding reviews/inventory markup may improve visibility.

Status: No confirmation of resolution; awaiting theme details and proper Liquid implementation.

Summarized with AI on December 11. AI used: gpt-5.
1

Hi,

I am trying to add structured data markup to my product pages, as per the instructions on this blog https://www.semrush.com/blog/rich-snippets/ however when I do I get an error in the shopify product edit code page that says thee is an error with the code. However I copied this code exact from the google output and it matches the structure in the instructions in the blog. Please help.

Thanks,

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2

Your code should go into a .liquid file, not .json file.

JSON is not the same thing as JSON-LD. JSON is a file format to transmit data. JSON-LD is a method to link data using JSON.

3

@BLKlabel11 hey, thanks for posting here.

Don’t use JSON file to add rich schema, please put these codes under the main product section (liquid file).

I hope it will work.

4

@BLKlabel11 like this :

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5

Thanks but don’t I have to put it against each individual product ? I can’t see liquid for each product

6

@BLKlabel11 if you want to add it for the specific product so add in a condition.

you can search product.liquid or main. product.liquid in section folder
can you please share the name of the theme?

7

Hi,
Your code belongs to JSON LD structured data, and from the code, you want to implement product reviews and price rich media effects on the product page.

-Your code should be added in the liqiud file, not the json file.
-It is not recommended to add the code in your screenshot to the product template, because the variables in the code are fixed. For example, the “price”: “$229.95” in the code, it is impossible for each of your products to be priced at $229.95, and Google pays attention to the authenticity of the website’s content. If you put this code on the website, it will damage the website’s SEO.

Therefore, it is recommended that merchants who cannot write structured data directly use the SEOAnt-AI SEO app with structured functions.

I checked your website, and here are my suggestions:

  1. Your product page does not have an entry for customers to write reviews, so it is recommended that you install a low-cost app review, because Shopify cannot implement the page review function, and can only use the reveiw app, and if you want to achieve the rich media effect of the review, the product must have real reviews to achieve it.
    Trustoo.io Product Reviews App is recommended. Please must install it through this link. There will be a pop-up prompt of 30% OFF on all plans for 1st month.

  2. In addition, I searched for the keyword “Coco-Lube” - this is the name of one of your products, and your website appeared in the 7th place, which is amazing.But your website only shows the rich media effect of the price,

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but the websites ranked ahead of you basically have this effect, so this may affect the click volume of your webpage.

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So your first change is consistent with the product structured data problem you want to solve most now.
SEOAnt can help you achieve the appearance of price, inventory and reviews on product pages.

It can also help you analyze the number of times your own website keywords (such as: Coco-Lube) have been searched by users in the past 12 months.

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According to the search for the Coco-Lub keyword, the first place is also your competitor: https://www.bawdee.com.au/, you can also analyze his website’s high-traffic and low-difficulty keywords for your use.

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1. In short, SEOAnt can help people like you who don’t know how to write structured data code, and help novice users automatically solve technical SEO problems.
2. SEOAnt’s batch setting of meta title and meta description, one-click setting of product structured data, lossless compression of website images, keyword research, backlink exchange, website acceleration functions, etc. can all help improve your website’s SEO and thus improve your website’s ranking.
3. SEOAnt can let you understand the comprehensive knowledge involved in SEO.

For all users who want to try solving structured data issues or those who want to optimize their website’s SEO with an SEO tool, I’m offering a 40% off code “SEOAnt-AI SEO40%OFF”, valid for 2 months.Please be sure to install it through this link.

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I wish you all a prosperous business！