Free accessibility checkers

Small, focused checks you can run right now — free, instant, and nothing you enter is uploaded anywhere. Each one covers a single WCAG criterion in depth; for a full page, use our free scanner instead.

• Colour contrast checker

  Enter two colours and get a live WCAG 2.2 AA/AAA pass or fail for normal text, large text and UI — hex, RGB or HSL.

• Readability checker

  Paste your text and see six readability formulas — Flesch, Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau and ARI — update live, in plain language.

• Colour blindness simulator

  Upload an image, or use the built-in sample, and see it approximated for protanopia, deuteranopia and tritanopia side by side.

• Colour converter

  Enter a colour in hex, rgb() or hsl() and get all three notations at once, with contrast ratios against black and white.

• Screen reader preview

  Paste your HTML and read it the way a screen reader speaks it — every heading, link, image, button and field in announcement order, with the lines that tell the listener nothing marked.

• Text-to-speech reader

  Paste text and hear it read aloud with your browser’s own voices — adjustable rate and pitch, nothing sent anywhere.

• Colour palette generator

  Generate complementary, triadic and other harmonious palettes — every swatch shows its readable text colour, WCAG contrast ratio and AA pass/fail.

• Image colour picker

  Click a photo, or move a crosshair with your keyboard, to pick a colour — hex, RGB, HSL and a live WCAG contrast verdict against white and black, entirely in your browser.

• Accessibility statement generator

  Fill in a short form and copy a ready accessibility statement — plain text or HTML, built on the W3C WAI structure, with EU “compliant” wording where it applies.

• Alt text checker

  Paste your HTML and check every image for missing, empty, redundant or file-name alt text against WCAG 1.1.1 — entirely in your browser.

• Heading structure checker

  Paste your HTML and see the heading outline plus structural problems — missing or multiple h1, skipped levels, empty headings.

Scan a full page — free One colour or one paragraph is a start — a real page has dozens of these checks at once.