Software Alternatives, Accelerators & Startups
Register | Login
Table of contents
  1. Comments
  2. Is it good?

Officially verified details
ValidateHTML

Free HTML, CSS, JSON & XML validator with 12 tools and instant quality scores from 0 to 100.

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 signup required, no usage limits, completely free.

A startup from France.

(0 reviews)
Pricing:
  • Free
Visit website Alternatives Status Page
ValidateHTML

ValidateHTML Reviews and Details

This page is designed to help you find out whether ValidateHTML is good and if it is the right choice for you.

Listed in

Developer Tools Webdev Code Quality Web App SEO Tools Website Monitoring

Screenshots and images

  • ValidateHTML HTML validation with instant quality score and detailed error list
    HTML validation with instant quality score and detailed error list //
    2026-03-24
  • ValidateHTML Open Graph checker with social media preview
    Open Graph checker with social media preview //
    2026-03-24
  • ValidateHTML 12 free developer tools in one place
    12 free developer tools in one place //
    2026-03-24
  • ValidateHTML Robots.txt analyzer with sitemap verification
    Robots.txt analyzer with sitemap verification //
    2026-03-24
  • ValidateHTML Paste code or enter a URL to validate instantly
    Paste code or enter a URL to validate instantly //
    2026-03-24

Features & Specs

  1. HTML Validator

    Check errors, warnings, and best practices

  2. CSS Validator

    Validate stylesheets and catch syntax errors

  3. JSON Validator

    Validate and format JSON with error detection

  4. XML Validator

    Check XML syntax and well-formedness

  5. Meta Tag Checker

    Verify title, description, viewport, charset

  6. Open Graph Checker

    Check OG tags with social media preview

  7. Accessibility Checker

    Detect WCAG and accessibility issues

  8. Robots.txt Checker

    Analyze crawl rules and verify sitemaps

  9. HTML Formatter

    Beautify or minify HTML code

  10. Quality Score

    Grade from 0 to 100 with A-F rating

  11. Export PDF

    Download validation reports as PDF

  12. No Signup Required

    100% free, no account needed

Badges

Promote ValidateHTML. You can add any of these badges on your website.

SaaSHub badge
Show embed code

Questions & Answers

As answered by people managing ValidateHTML.

  1. What makes ValidateHTML unique?

    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.

  2. Why should a person choose ValidateHTML over its competitors?

    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.

  3. How would you describe the primary audience of ValidateHTML?

    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.

  4. What's the story behind ValidateHTML?

    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.

  5. Which are the primary technologies used for building ValidateHTML?

    Next.js, React, TypeScript, Tailwind CSS, deployed on Vercel.

  6. Who are some of the biggest customers of ValidateHTML?

    Independent web developers, Freelance frontend engineers and Small web agencies.

Videos

We don't have any videos for ValidateHTML yet.

Add video

Is ValidateHTML good?

ValidateHTML.com appears to be a lightweight, browser-based HTML validation tool that helps developers quickly check their markup for syntax errors and standards compliance without needing to install software or use complex configurations. It's a practical utility for basic validation needs, though it may lack the depth of features found in more established validators like the W3C Markup Validation Service.

Why choose ValidateHTML?

  • Provides quick and easy HTML validation directly in the browser
  • No installation or setup required, making it accessible for quick checks
  • Helps identify syntax errors and potential issues in HTML code
  • Free to use for basic validation tasks
  • Simple interface that's easy to navigate for users of all skill levels

Recommended for

  • Beginner web developers learning HTML syntax and best practices
  • Developers needing quick, on-the-fly validation without switching tools
  • Students working on web development coursework or projects
  • Freelancers or small teams without access to premium validation suites
  • Anyone troubleshooting basic HTML rendering issues

External links

We have collected here some useful links to help you find out if ValidateHTML is good.

  • Public traffic stats of ValidateHTML

    Check the traffic stats of ValidateHTML on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.

  • Domain Rating (DR)

    Check the "Domain Rating" of ValidateHTML on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of ValidateHTML's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.

  • Domain Authority (DA)

    Check the "Domain Authority" of ValidateHTML on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.

  • Public opinion on Reddit

    The latest comments about ValidateHTML on Reddit. This can help you find out how popualr the product is and what people think about it.

Do you know an article comparing ValidateHTML to other products?
Suggest a link to a post with product alternatives.

Suggest an article

ValidateHTML discussion

Log in or Post with
Visit official website
validatehtml.com

Is ValidateHTML good? This is an informative page that will help you find out. Moreover, you can review and discuss ValidateHTML here. The primary details have been verified within the last quarter. So they could be considered up to date. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.

Loading...