JSON beautifier for SEO: read and fix JSON-LD structured data
Beautify the structured data from a page, fix syntax first, then check the schema with a validator.
By ClaudeGPT Si Newsroom, Editorial team··2 min read
A JSON beautifier turns compressed JSON into indented, readable text, and for SEO work that mostly means one thing: reading the JSON-LD structured data on a page. Paste the script contents into AyeTab's JSON Formatter, which beautifies and checks the JSON free in your browser, and the schema becomes easy to review.
Why SEO people end up beautifying JSON
Structured data in the JSON-LD format sits in a script tag in the page source. Content systems and plugins usually print it on one line, sometimes several blocks of it, and a single block can hold an Organization, a WebSite, a BreadcrumbList, an Article and an FAQPage all nested together. Reviewing that by eye on one line is slow, and small mistakes hide well.
A beautifier helps with three common jobs:
- Auditing a page. See which types are present, how they link with
@idreferences and which properties are filled in. - Comparing templates. Beautify the JSON-LD from two page types and you can spot the property one template forgets.
- Debugging a broken block. A beautifier has to parse the JSON first, so it shows you whether the block is valid JSON at all.
A quick review routine
- View the page source and copy the contents of the
application/ld+jsonscript, without the script tags. - Paste it into the AyeTab tool. It formats and checks it as you paste.
- If it reports an error, the block is not valid JSON, and search engines cannot read any of it. Fix that first.
- If it parses, read the indented structure and compare it with the schema type you meant to publish.
- Press Minify when you want the cleaned-up version back on one line for your template.
Valid JSON is not the same as valid schema
This is the step people skip. A beautifier only tells you the syntax is right. It does not know whether you used the right schema.org types, or whether a page has the properties a search feature expects.
| Check | What it catches | Tool |
|---|---|---|
| JSON syntax | Trailing commas, bad quotes, unclosed brackets | A JSON beautifier such as AyeTab |
| Schema.org vocabulary | Wrong types or property names | A schema validator |
| Rich result eligibility | Missing required properties for a search feature | Google's Rich Results Test |
So beautify first to read and fix the JSON, then run the block through a schema validator such as the seogeoaeo.ai Schema.org Validator, and check rich result eligibility with Google's own test.
Keep client markup private
Agency work often means pasting JSON-LD from staging sites or unreleased pages. AyeTab parses the JSON in your browser tab, with no account and no upload, and it keeps working offline after the page loads. That is a comfortable default when the markup belongs to a client.
If you check structured data every day, the AyeTab extension for Chrome puts the beautifier on your new tab page and in a side panel, next to an HTML formatter and a meta tags generator.
When another tool fits better
If you want to explore a large block as a collapsible tree, jsonformatter.org has a tree view. If you only need to know whether markup qualifies for a rich result, go straight to Google's test. For reading and cleaning JSON-LD quickly, a local beautifier is the fastest first step.