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Json List is a lightweight tool for viewing and managing JSON data. Open any local JSON file or load one from a URL, then explore it in a clean, user-friendly list format.

W3C Markup Validation Service
Code Beautify JSON Validator
HTML Validator
Schema Validator
Total Validator
Free HTML, CSS, JSON & XML validator with 12 tools and instant quality scores from 0 to 100.
Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | sj14apps.com | validatehtml.com |
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| Company | — | Startup from France · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


Key features: • Material You dynamic color support • Split-screen mode for raw JSON + list view • Search and filter entries for faster navigation • Edit JSON items directly
ValidateHTML is a free suite of 12 web validation tools in one place. Paste code or enter a URL to validate HTML, CSS, JSON, XML, check meta tags, Open Graph data, accessibility, robots.txt, and more. Every validation returns a quality score from 0 to 100 so you know exactly where you stand. No...
What each product offers, as listed by its team.


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An editorial look at what each product does well and who it suits.


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Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Json List and ValidateHTML.
ValidateHTML's answer:
12 validation tools in one place with an instant quality score from 0 to 100. No signup, no limits, completely free. Paste code or enter a URL and get results in seconds.
ValidateHTML's answer:
Instead of opening 5 different tabs (W3C for HTML, JSONLint for JSON, separate tools for meta tags, Open Graph, accessibility), ValidateHTML combines everything in one interface. Plus you get a quality score that tells you exactly where you stand.
ValidateHTML's answer:
Web developers, frontend engineers, and SEO specialists who need to validate code quality before deploying. Also useful for freelancers and agencies managing multiple client sites.
ValidateHTML's answer:
I was tired of opening 5 or 6 different tabs every time I needed to validate my code before deploying. W3C for HTML, JSONLint for JSON, random sites for meta tags. So I built one tool that does everything, with a quality score to instantly know where you stand.
ValidateHTML's answer:
Next.js, React, TypeScript, Tailwind CSS, deployed on Vercel.
ValidateHTML's answer:
Independent web developers, Freelance frontend engineers and Small web agencies.
Share your experience with using Json List and ValidateHTML. For example, how are they different and which one is better?
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Validates HTML markup of web pages, one at a time.
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Pandia is a fast, native JSON viewer & editor for macOS, Windows and Linux. It opens multi-gb files instantly (no upload, no size limit), shows JSON five ways — Tree, Code, Grid, Graph, Compare — and generates types for 9 languages. Offline & free.
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Code Beauty’s JSON Validator or JSON Lint is easy to use tool to copy, paste and validate JSON data.
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Open a 1GB JSON file in a blink 💣
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HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla.
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