Pa11y

Name: Pa11y
Brand: Pa11y

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Free and open-source tools to help designers and developers make web pages more accessible.

Developer Tools Testing & QA UI/UX Design

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Tracked since2026

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The Bottom Line

Entry price

Free plan available, paid tiers above

Biggest pro

Completely free and open-source

Biggest con

Requires some technical knowledge for CLI and Webservice tools

TL;DR - Pa11y

Provides free and open-source web accessibility testing tools.
Offers CLI tools for developers and a dashboard for non-developers.
Helps identify and track accessibility issues on web pages over time.

Pricing: Free plan available

Best for: Growing teams

What is Pa11y?

Editorial review

Pa11y provides a suite of free and open-source tools designed to improve web accessibility for everyone. It offers various solutions for designers and developers to identify and track accessibility issues on their websites. The core offerings include a command-line interface (Pa11y) for one-off accessibility tests, a web dashboard (Pa11y Dashboard) for daily automated testing and trend tracking, a JSON-based webservice (Pa11y Webservice) for custom integrations, and a CI-focused command-line tool (Pa11y CI) for iterating over multiple web pages. These tools cater to both technical users who want to integrate accessibility testing into their development workflows and non-technical users who need to monitor accessibility performance over time.

Available on: Web, macOS, Linux

LCLouis CorneloupUpdated May 27, 2026 · how we evaluateSourcepa11y.org ↗

Pros & Cons

Pros

Completely free and open-source
Offers multiple tools for different use cases (CLI, Dashboard, Webservice, CI)
Helps track accessibility trends over time with graphs
Supports integration into continuous integration workflows

Cons

Requires some technical knowledge for CLI and Webservice tools
Dashboard might require setup and hosting by the user

Key Features

Command-line interface for one-off accessibility tests (Pa11y)Web dashboard for daily automated accessibility testing (Pa11y Dashboard)Graphs to track accessibility improvements and regressions over timeJSON-based webservice for custom integrations (Pa11y Webservice)Command-line tool for iterating over multiple web pages, suitable for CI (Pa11y CI)

Pricing Plans

Pricing checked Aug 4, 2026

Pa11y

Free

Command-line interface
Loads web pages and highlights accessibility issues
Useful for one-off tests

Pa11y Dashboard

Free

Web dashboard
Automatically tests web pages for accessibility issues daily
Graphs help track improvements and regressions
Useful for non-developers

Pa11y Webservice

Free

JSON-based webservice
Backs Pa11y Dashboard
Useful for building custom dashboards or repurposing data

Pa11y CI

Free

Command-line tool
Iterates over a list of web pages
Highlights accessibility issues
Geared towards use in CI

Calculate your cost View full pricing

Is Pa11y worth the price?

100/100

The pricing for Pa11y is exceptionally generous as all tools are completely free.

This makes it an incredibly fair and accessible option for anyone looking to improve web accessibility without any financial commitment. It's best for individuals, small teams, and organizations of all sizes who need robust accessibility testing tools without budget constraints.

Hidden Costs & Gotchas

No hidden costs; all tools are free.

Requires self-hosting and infrastructure.

No direct support included for free tools.

How Pa11y Compares to Competitors

Compared to commercial accessibility tools like Axe Pro ($40/month per user) or Siteimprove (custom enterprise pricing, often thousands), Pa11y stands out by offering all its robust tools completely free. This makes it a significantly more cost-effective solution, though it requires more self-management than paid, fully-managed services.

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Best Pa11y Alternatives

Top alternatives based on features, pricing, and user needs.

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ApplitoolsFreemium

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SonarQubeFreemium

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OWASP ZAPFree

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PlaywrightFree

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CodeClimateFreemium

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4.6

PercyFreemium

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

All Pa11y alternatives6+ tools ranked, pricing + verdict per pick Pa11y vs ApplitoolsHead-to-head: features, pricing, who wins Pa11y vs SonarQubeHead-to-head: features, pricing, who wins Pa11y vs OWASP ZAPHead-to-head: features, pricing, who wins

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Pa11y FAQ

How does Pa11y help with continuous integration workflows?

Pa11y includes a specific command-line tool, Pa11y CI, designed for iterating over multiple web pages. This allows developers to integrate accessibility testing directly into their continuous integration pipelines, ensuring accessibility is checked with each new build.

Which teams benefit most from using Pa11y?

Pa11y is ideal for development teams, QA teams, and UI/UX designers who need to ensure their web pages are accessible. It provides tools for both technical users integrating tests into workflows and non-technical users monitoring performance.

What kind of accessibility issues can Pa11y help identify?

Pa11y helps identify and track various accessibility issues on websites. It provides solutions for designers and developers to pinpoint problems and monitor accessibility performance over time through its suite of tools.

How is Pa11y priced?

Pa11y offers a free tier, providing access to its core open-source tools. For users requiring more extensive usage or additional features, paid plans are available.

Can Pa11y be used for automated daily accessibility testing?

Yes, Pa11y Dashboard is specifically designed for daily automated testing and tracking accessibility trends. It allows users to monitor the accessibility performance of their websites over time with graphical representations.

How does Pa11y compare to SonarQube for web accessibility testing?

Pa11y focuses specifically on web accessibility, offering a suite of free and open-source tools for identifying and tracking accessibility issues. SonarQube, while also a code quality tool, has a broader scope that includes various aspects of code analysis beyond just accessibility.

What are the main trade-offs when using Pa11y?

Using Pa11y's CLI and Webservice tools requires some technical knowledge for effective implementation. Additionally, setting up and hosting the Pa11y Dashboard might require user effort.

Source: pa11y.org

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