There are plenty of tools out there. Here are some free tools that we use and recommend.

Web accessibility guides

Guide Description
Accessibility Tips for Teams

Must-have resource to create and maintain accessible products in organisations.

Everyone in product teams has a role to play, from product managers, designers and developers through QA testers and content editors. For example, we know that images and media need text alternatives, but who is responsible for getting and implementing them?

Download ABC Tips for Teams poster series. They're simple, useful and beautiful accessibility checklists to help you and your teams.

Automated website testing tools

Use these to get a snapshot of webpage accessibility. They're a quick easy way to check if images have text alternatives, if a page has headings and other accessibility fundamentals.

Tool Description
WAVE browser extensions The WAVE Chrome and Firefox extensions allows you to evaluate web content for accessibility issues directly within Chrome and Firefox browsers.
Google Lighthouse These days we're loving Lighthouse. You can run it against any web page, public or requiring authentication. It has audits for performance, accessibility, progressive web apps, and more. It works on PC or Mac, standalone or built into Chrome Developer Tools
Bookmarklets for accessibility testing Bookmarklets for Accessibility Testing use JavaScript to highlight roles, states, and properties of accessibility elements on the page. They are accessible to screen reader users and work on any browser including mobile phones

Warning

Automated accessibility checkers can't check everything. in fact they're only useful to check about 30% of success criteria in the Web Content Accessibility Guidelines (WCAG). For example they can't check if all headings have been marked up correctly, or how suitable heading or 'alt' text content is.

Colour analysis

Content must contrast well against its background or it will be hard to read by people with low vision, or who have limited colour perception. Checking for sufficient colour contrast is easy with these free tools.

Tool Description
Colour Contrast Analyser Quickly and easily check colour contrast

Screen readers

People who are blind use assistive technologies called screen readers to read, navigate and use digital content. Use a screen reader to test how your content is conveyed to people. Someare available for free download, or packaged with your device.

Tool Description
NVDA NVDA (NonVisual Desktop Access) is a free “screen reader” which enables blind and vision impaired people to use computers. It reads the text on the screen in a computerised voice.
Voiceover The Voiceover screen reader is packaged into all Apple computers and portable devices. If you have a Mac, iPhone or iPad you already have it. It's a great way to check how your website or app is shown to people who are blind.

Switch Control

Users with limited mobility or dexterity may use use a Switch with one or more buttons to navigate webpages and devices. The following links have handy setup and usage instructions to get you started with testing.