CSS HTML Validator Description

CSS HTML Validator for Windows, Mac, and Linux is a fast, powerful, highly user configurable, and easy to use professional web development tool that checks HTML/HTML5, CSS, accessibility, SEO, PHP, XHTML, JavaScript, links, htmx, and more.

CSS HTML Validator will give you valuable and customizable advice while alerting you to obsolete, deprecated, and proprietary tags, attributes, and CSS. Make sure that your website visitors do not leave your site because they run into broken links or other problems caused by poorly written HTML and CSS.

The latest version of CSS HTML Validator includes updated HTML & CSS support, improved accessibility checking, support for htmx, new editor color schemes, and other updates and improvements.

A Batch Wizard in the Pro edition lets you easily validate entire websites and multiple HTML documents by generating a single validation report in HTML format.

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.

Pricing

Pricing Starts At:
$60 (one time)
Pricing Information:
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).
Free Version:
Yes
Free Trial:
Yes

Integrations

API:
Yes, CSS HTML Validator has an API

Reviews - 4 Verified Reviews

Total
ease
features
design
support

Company Details

Company:
AI Internet Solutions LLC
Year Founded:
1997
Headquarters:
United States
Website:
www.htmlvalidator.com
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Media

Main window

Main window

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Product Details

Platforms
Windows
Mac
Linux
Types of Training
Training Docs
Customer Support
Business Hours
Online Support

CSS HTML Validator Features and Options

Website Optimization Tools

Competitor Analysis
Content Management
Keyword Research Tools
Link Management
Performance Metrics
Problem Area Alerts

SEO Software

A/B Testing
Artificial Intelligence (AI)
Auditing
Competitor Analysis
Content Management
Dashboard
Google Analytics Integration
Keyword Research Tools
Keyword Tracking
Link Management
Localization
Mobile Search Tracking
Rank Tracking
Revenue Management
User Management

Web Accessibility Testing Tool

ADA Compliance
Alerts / Notifications
Automated Testing
Mobile Accessibility Testing
Ongoing Accessibility Monitoring
Reporting / Analytics
Visualize Accessibility
WCAG Compliance

CSS HTML Validator Lists

CSS HTML Validator User Reviews

Write a Review
  • Name: Jim M.
    Job Title: Sole administrator
    Length of product use: 2+ Years
    Used How Often?: Weekly
    Role: User, Administrator
    Organization Size: 1 - 25
    Features
    Design
    Ease
    Pricing
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Keeps your code clean

    Date: Jan 10 2025

    Summary: I use it all the time, would not want to be without it. Having used it over the last five years, it is the easiest way of keeping your code clean and free of errors. By doing this, you make life easier for yourself in the long run. And you pick up errors before you upload them as live webpages.

    Positive: I starting using this five years ago, and have not looked back since. It really is a one-stop shop for keeping your code free of any problems. By finding issues in your code, however minor they might seem, you can keep your code clean, and this leads to far fewer problems in the long run. Without it, minor issues aren't caught, but at some stage they accumulate and then you end up with a big mess which is much harder to sort out. Good support if you have any problems in implementation. Highly recommended.

    Negative: Nothing. If I had any difficulty in implementing a particular option, I contacted support and the problem was sorted.

    Read More...
  • Name: Anonymous (Verified)
    Job Title: Volunteer serving Non-Profit Organizations
    Length of product use: 2+ Years
    Used How Often?: Daily
    Role: User
    Organization Size: 1 - 25
    Features
    Design
    Ease
    Pricing
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Superb Tool for Creating and Maintaining HTML, CSS, PHP, JavaScript, and More

    Date: Feb 05 2024

    Summary: I first encountered CSS HTML Validator sometime around year 2000. Initially, I used the limited free version, but, as my reliance on HTML/CSS/JavaScript/PHP increased, I upgraded to the Home edition and then to Professional. In an era where much sophisticated technology is available as "freeware", there remain applications maintained by individuals that are well worth their upfront cost. CSS HTML Validator is such an app.

    Positive: Excellent syntax checking that, in addition to locating errors, offers relevant targeted advice on correcting errors, best practices, accessibility, and SEO, making CSS HTML Validator a good tool when learning HTML, CSS, etc., and a sophisticated advisor even for an advanced practitioner. In addition to validating single HTML/CSS pages, it checks links and is able to process an entire website to generate a comprehensive analysis of all pages. The website can be local on the file system or online and accessed via a URL. The validator engine allows one to choose the level of error checking (Full, Errors only, Errors and warnings only, etc.) and enabling/disabling specific messages. The editor includes features specific to editing HTML and CSS pages. Validation includes JSON (in HTML pages) and WCAG (Web Content Accessibility Guidelines).

    Negative: As with any product, various individuals will have various preferences, but, for myself, I am at a loss to suggest possible improvements. As one who runs Linux, the fact that CSS HTML Validator is a Windows-only application was a "con" (I ran it in a VM), but, as of Wine 9.0, all features of CSS HTML Validator perform flawlessly when installed on Linux with Wine.

    Read More...
  • Name: Gregory P.
    Job Title: Full Stack Developer
    Length of product use: 6-12 Months
    Used How Often?: Weekly
    Role: User
    Organization Size: 1 - 25
    Features
    Design
    Ease
    Pricing
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Best Validation software available for HTML/CSS/PHP

    Date: Jul 20 2022

    Summary: Load and click validate. Messages are easy to follow to find your errors, Just make the fix and save, and re validate to check again.

    Positive: Love the way it tells you the line and the error message. Makes troubleshooting very easy. Just open your file and click validate, just that easy.

    Negative: Wish there was a lifetime price for upgrades, but am satisfied with the current pricing per version.

    Read More...
  • Name: Allen M.
    Job Title: Owner/Developer
    Length of product use: 2+ Years
    Used How Often?: Weekly
    Role: User, Administrator, Deployment
    Organization Size: 1 - 25
    Features
    Design
    Ease
    Pricing
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Very helpful with old ASP.NET application I maintain

    Date: Jul 20 2022

    Summary: This really fills a void trying to structure the pages in a modern HTML5 way. Required reworking them where they were out-of-date but this ensures they stay reasonably compliant. Saves a ton of time that way.

    Positive: The ASPX pages are html nightmares for the most part. By testing the runtime manifestations against this product (in other words, grab the page source and drop it into this product), I can see a number of things that need to be addressed in the source - css, poor document structure
    The only limitation I have run into is that I need to embed css links in the pages explicitly instead of relying on the Telerik style sheet manager to organize and provide them to the app. It would be very helpful if a set of CSS stylesheets could be automatically searched and so on.

    Negative: I am not sure why I get the starting panel offering me options on startup. Maybe it can be disabled. A bit annoying.

    Read More...
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