Is the Structured Data Validator free to use?

Yes. Structured Data Validator on Markvibe is 100% free with no sign-up, no credit card, and no usage limits.

Does the Structured Data Validator upload my data to a server?

No. The Structured Data Validator runs entirely in your browser using client-side JavaScript, so your input never leaves your device. The only exceptions are tools that explicitly need a third-party API (e.g. WHOIS, DNS, AI), which is clearly indicated.

Is the Structured Data Validator safe and private?

Yes. Because processing happens locally in your browser, files, text, and other inputs are not stored on our servers. We don't require accounts and we don't track tool inputs.

Can I use Structured Data Validator on mobile?

Absolutely. Every tool on Markvibe, including Structured Data Validator, is fully responsive and works smoothly on iOS, Android, tablets, and desktops.

Do I need to install anything to use Structured Data Validator?

No installation required. Structured Data Validator is a pure web app — open the page and start using it instantly in Chrome, Firefox, Safari, Edge, or any modern browser.

What other seo tools do you offer?

Markvibe ships 184+ free tools including a full suite of seo tools. Scroll to "Related tools" below to discover more utilities in this category.

Structured Data Validator — Free Online Tool

What is the Structured Data Validator?

The Structured Data Validator is a free online seo tools from Markvibe. Validate JSON-LD syntax. It runs entirely in your browser — your data never gets uploaded — and works on desktop, tablet and mobile with no sign-up.

Reviewed by The Markvibe Team · Last updated 2026-06-28

Example

A worked example so you know exactly what to expect.

Input

(your input goes here)

Output

(the Structured Data Validator runs in your browser and shows the result instantly)

How to use Structured Data Validator

1Open the Structured Data Validator on this page — it loads instantly with no sign-up.
2Paste the value or URL you want to inspect. You can paste, type, drag-and-drop, or upload depending on the tool.
3Set any options (format, size, mode) to match exactly what you need.
4Click the check button to run Structured Data Validator in your browser.
5Review the result, then copy it to your clipboard or download the output file.

Why use our Structured Data Validator

✓ 100% free Structured Data Validator — no sign-up, no watermark, no hidden limits
✓ Runs entirely in your browser so your data never leaves your device
✓ Blazing-fast results — built for speed by Markvibe
✓ Mobile-friendly: use Structured Data Validator on phone, tablet, or desktop
✓ One of 184+ seo tools utilities under one roof
✓ Privacy-first: no tracking of inputs, no accounts, no ads in the tool area