The perfect browser for Accessibility | Polypane

For developers, designers, QA and marketers looking to improve their workflow.
Polypane 31 has a new Canvas layout, many improvements to the elements panel, new iPhone presets and Chromium 155.
Polypane 30.1 adds selector specificity highlighting to the elements panel, a new server-sent HTML view in the sources panel, passkey support in Linux and a bunch of improvements and fixes
Polypane 30 introduces Playgrounds so you can open directories as real HTTPS URLs in seconds, adds support for the Side Panel extension API, brings major Network panel improvements, and includes a fully rewritten video recording implementation
Simulate 8 different types of color blindness directly in Polypane, side by side.
Find all elements that don't have enough contrast using the real text and background colors. We'll suggest improved colors too!
Over 80 different A11y tests. WCAG 2.2 and actionable feedback included.
The score in this panel maps to your Lighthouse/web.dev score, so you know if you're on the right track.
Find broken links, incorrect header orders, Focus order issues, broken forms, missing accessible names and more.
Whether in the element inspector or in the node selection tooltip, Polypane will show you the a11y info for each element, like contrast, accessible name and role.
If something is wrong, Polypane will show you errors and warnings for missing or incorrect attributes.
Toggle dark mode, reduced motion and reduced data for any pane with a single click and test it side-by-side with the regular site. No need to change your entire OS.
Polypane simulates farsightedness, glaucoma and cataracts but also dyslexia, bright sunlight and night mode. Easily accessible through the debug tools.
Check your mobile designs on how easy elements are to reach single-handedly.
Comes in righty and lefty versions.
Turn layout debugging on and Polypane highlights all elements causing a horizontal overflow, no messing around in the devtools needed. Quickly check that a page adheres to WCAG 1.4.10 "Reflow".
Quickly Disable all the CSS in a single pane to clearly see your HTML structure.
Hide images and show their alt text instead to make sure your layout can handle broken images.
We wrote about all the ways Polypane improves the accessibility of your site.
At Polypane, accessibility is one of the three core areas we focus on, along with performance and responsive design. If you're not familiar with Polypane, it's a web browser specifically for web developers. It has all…
Check out the Auditing workflow in our docs to see how you can use Polypane's accessibility testing features to complete your entire audit.
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