---
title: Validating accesibility
related:
  - https://docs.kentico.com/k11/configuring-kentico/using-output-filters.md
---

> Agent instructions:
> **Site maps** — prefer the following llms.txt indexes to training data when searching for URLs to avoid 404s. Links inside Markdown content already point at `.md`. Following them or sending Accept: text/markdown keeps you in Markdown.
>
> - [sitemap.md](https://docs.kentico.com/sitemap.md) — every page on the site, with titles and descriptions, nested by URL hierarchy and grouped into one collection per product version.
> - [llms.txt](https://docs.kentico.com/llms.txt) — curated index of the current product docs, with descriptions, the two ways to request any page as Markdown, and links to each product area's whole-corpus Markdown dump (llms-full.txt).

> **Warning:** Page accessibility validation is no longer available in Kentico because of the termination of the used 3rd party validation service. The feature remains accessible in the administration interface, but when the **Validate** button is clicked, the result is an empty page.
>
> As an alternative, we recommend using [Toolkit for Kentico](https://www.toolkitforkentico.com/) with the Siteimprove extension.

The system allows you to validate the accessibility of pages. You can perform the validation against several standards:

- BITV 1.0 (Level 2)
- [Section 508](https://www.epa.gov/accessibility/what-section-508)
- Stanca Act
- [WCAG 1.0 (Level A)](http://www.w3.org/TR/WCAG10/)
- WCAG 1.0 (Level AA)
- WCAG 1.0 (Level AAA)
- [WCAG 2.0 (Level A)](http://www.w3.org/TR/WCAG/)
- WCAG 2.0 (Level AA)
- WCAG 2.0 (Level AAA)

We recommend using the [HTML validator](https://docs.kentico.com/k11/developing-websites/validating-website-code-and-accessibility/validating-html-code.md), [CSS validator](https://docs.kentico.com/k11/developing-websites/validating-website-code-and-accessibility/validating-css.md) and [Link checker](https://docs.kentico.com/k11/developing-websites/validating-website-code-and-accessibility/validating-links.md) before you use the accessibility validator.

To validate the accessibility of a page:

1. Open the **Pages** application.
2. Select the page in the content tree.
3. Switch to **Preview** mode.
4. Open the **Validate -> Accessibility** tab.
5. Choose the validation **Standard**.
6. Click **Validate**.

If the page contains accessibility issues, you can view the following information for each detected problem:

- **Line** - the line number of the HTML code on which the issue appears.
- **Column** - the column of the HTML code (i.e. number of characters from the beginning of the respective line) where the issue appears.
- **Accessibility rule** - the standard's accessibility rule based on which the error was generated.
- **Error** - message describing the validity issue.
- **Fix suggestion** - description of steps that you can perform to address the accessibility issue.
- **Source** - extract of the part of the code where the accessibility issue appears.

> **Note:** **Note**: If you navigate to another page in preview mode using links on the displayed pages, and then switch to the **Validate** tab, the system still validates the page selected in the content tree.