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Free Structured Data Checker

Find JSON-LD blocks and check whether they parse correctly.

Three fresh analyses daily. One page per website, or ten recent videos per channel. Optional AI explanation is limited separately.

How to use this tool & FAQs

How to use the free structured data checker

  1. 1

    Enter a public URL or channel. For comparisons, include your competitor.

  2. 2

    Run the analysis and review the evidence, collection time, and coverage.

  3. 3

    Apply the most useful fixes, then save your report in Postly to continue.

Check JSON-LD before reviewing eligibility

The checker finds JSON-LD blocks in the returned page and identifies JSON parsing errors. Start by repairing malformed syntax, then review whether the data accurately describes visible content. Valid JSON does not establish that required schema properties are present or that a page qualifies for a rich result. Use a dedicated schema validator for that additional review.

What this checks

Find JSON-LD blocks and check whether they parse correctly. The report distinguishes measured HTML signals from optional provider data and AI recommendations.

Understand the coverage

Public website analysis reads HTML without executing scripts. Hidden channel metrics and unavailable performance data remain unavailable. Competitor wording is a content signal, not keyword-volume or traffic data.

Frequently asked questions

Is this tool free?

Yes. You can run three fresh analyses daily, shared across SEO and competitor tools, with a one-minute cooldown. Cached results can be reused. AI explanations have a separate daily allowance.

Does the tool use AI?

The checks and scores come from measured evidence. When available, Postly’s AI adds a short explanation and practical recommendations. Measured results remain usable if AI is unavailable.

Can I audit my entire website?

The free audit checks one page. Eligible Postly dashboard workspaces can crawl up to 50 linked pages per run, save reports, compare previous results, and export findings.

Will my report appear in search results?

Submitted reports are not indexed. Public reports expire after one day; saved dashboard reports are retained for 30 days.

Tips for using your result

Turn findings into practical improvements

The checker finds JSON-LD blocks in the returned page and identifies JSON parsing errors. Start by repairing malformed syntax, then review whether the data accurately describes visible content. Valid JSON does not establish that required schema properties are present or that a page qualifies for a rich result. Use a dedicated schema validator for that additional review. Find JSON-LD blocks and check whether they parse correctly. The report distinguishes measured HTML signals from optional provider data and AI recommendations. Public website analysis reads HTML without executing scripts. Hidden channel metrics and unavailable performance data remain unavailable. Competitor wording is a content signal, not keyword-volume or traffic data.

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