Related Products
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About
AllyProof is a web accessibility testing and monitoring platform for developers, consultants, agencies and teams maintaining business or client sites. It checks pages for WCAG 2.2 A/AA failure patterns using axe-core, HTML_CodeSniffer and APCA, presenting severity, criteria and evidence to guide remediation. Its Chrome extension runs local axe-core checks and highlights affected elements. Cloud scans crawl sites and retain findings and scan history for scheduled rechecks, team workflows and reports. Paid plans add AI fix suggestions for review and testing, API and CLI access, CI/CD workflows, Jira integration and VPAT-based evidence drafts. The free tier includes one site and monthly rechecks; Business adds weekly monitoring and a 14-day trial requiring a payment method, with billing beginning after 14 days unless cancelled. A public MCP server lets compatible clients run scans. Automated findings do not establish WCAG conformance or replace manual evaluation.
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About
CSS HTML Validator 2027 for Windows, Mac, and Linux is a fast, powerful, highly user configurable, and easy to use web development tool that checks HTML, CSS, SEO, spelling, accessibility (including WCAG), PHP, XHTML, JavaScript, htmx, and links. Now updated for 2027.
It works offline so it's super-fast and your privacy is protected because your documents are not uploaded to a server for checking.
CSS HTML Validator includes batch processing (in the Pro edition), integrated HTML/CSS editing, and much more.
CSS HTML Validator Pro has superior customization features so you can configure the validation to your liking. You can even add your own validator messages, recognize your own HTML elements and attributes, and much more.
Try the FREE online version.
Try CSS HTML Validator Pro for Windows free for 200 validations or 30 days, whichever comes first. A FREE limited version of htmlval for Mac and Linux is also available.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Supported
Mac
Supported
Linux
Supported
Cloud
Not Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Web developers, accessibility testers, web agencies and teams maintaining business or client websites.
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Audience
Any person, business, government, or other entity with a website
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Supported
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API
Offers API
Not Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
€35/site/month
The Free plan includes one website, monthly rechecks and limited on-demand scans. Business costs €35 per site/month, or €28 per site/month billed annually (€336 per site/year), and supports up to 10 sites. The 14-day trial requires a payment method; billing starts at the selected rate unless cancelled before the trial ends. Enterprise pricing is custom for larger portfolios.
Free Version
Supported
Free Trial
Supported
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Pricing
$60 (one time)
CSS HTML Validator Home Edition is only $60 and the Pro Edition is $125. The Mac and Linux command line tool (htmlval) is $79 (included with Pro). These are NOT recurring subscription prices. The online version is FREE.
Free Version
Supported
Free Trial
Supported
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Reviews/
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Reviews/
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Pros & Cons from Real UsersPros
Cons
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationAllyProof
Founded: 2026
Ukraine
allyproof.com
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Company InformationCSS HTML Validator
Founded: 1997
United States
www.htmlvalidator.com
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AlternativesNo Alternatives
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Alternatives |
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Categories |
Categories |
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Web Accessibility Testing Features
ADA Compliance
Not Supported
Alerts / Notifications
Not Supported
Automated Testing
Not Supported
Mobile Accessibility Testing
Not Supported
Ongoing Accessibility Monitoring
Not Supported
Reporting / Analytics
Not Supported
Visualize Accessibility
Not Supported
WCAG Compliance
Supported
SEO Features
A/B Testing
Not Supported
Artificial Intelligence (AI)
Not Supported
Auditing
Not Supported
Competitor Analysis
Not Supported
Content Management
Not Supported
Dashboard
Not Supported
Google Analytics Integration
Not Supported
Keyword Research Tools
Supported
Keyword Tracking
Not Supported
Link Management
Not Supported
Localization
Not Supported
Mobile Search Tracking
Not Supported
Rank Tracking
Not Supported
Revenue Management
Not Supported
User Management
Not Supported
Website Optimization Tools Features
Competitor Analysis
Not Supported
Content Management
Not Supported
Keyword Research Tools
Supported
Link Management
Supported
Performance Metrics
Not Supported
Problem Area Alerts
Not Supported
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Integrations
EmEditor
Not Supported
GitHub Actions
Supported
GitLab
Supported
Jenkins
Supported
Jira
Supported
Model Context Protocol (MCP)
Supported
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Integrations
EmEditor
Supported
GitHub Actions
Not Supported
GitLab
Not Supported
Jenkins
Not Supported
Jira
Not Supported
Model Context Protocol (MCP)
Not Supported
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