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blurple labEMPATHY LENS · FREE TOOL

Reports tell you. This makes you feel it.

A bookmarklet that lets you browse your own site through low vision, color blindness, dyslexia and hand tremor. One drag to install, works on any page you own.

no signup · runs in your browser · nothing leaves the page

TRY THE LENS — RIGHT HERE
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BASELINE
Your page, as you see it.
This is the demo page most teams design for: sharp type, full color, a steady hand on the mouse. Now pick a lens.
Around 1 in 4 adults in the EU lives with some form of disability.
HOW IT WORKS

What it checks, and how to read the result.

WHAT IT CHECKS

  • Low vision: blur, glare and lost contrast, so you see which text survives.
  • Colour blindness: a deuteranopia filter, where reds and greens become hard to tell apart.
  • Dyslexia: letters shuffled inside words on the visible text, an approximation of how reading can feel.
  • Hand tremor: a jittering cursor ring, so small targets show how hard they are to hit.

HOW TO USE IT

  1. 1Try each lens on the demo page above.
  2. 2Drag the empathy lens button to your bookmarks bar.
  3. 3Open your own site, click the bookmark and switch between lenses on the bar it adds. The ✕ on the bar turns it off.

READING THE RESULT

  • Look for what disappears: grey body text under low vision, red and green status colours under colour blindness, long paragraphs under dyslexia, small buttons under tremor.
  • Whatever breaks for you here breaks every day for someone else.

WHAT IT DOESN'T DO

  • It is an approximation that builds empathy, not a medical simulation and not an audit.
  • It runs only in your browser and sends nothing anywhere. Some sites block bookmarklets with their content security policy.
Then check your page: a11y-ray lite →
INSTALL — ONE DRAG
Drag, open your site, feel it.

The lens runs entirely in your browser, on pages you're already looking at. No extension store, no permissions, no data anywhere.

01Drag the button to your bookmarks bar
02Open any page of your product
03Click it, pick a lens, try to complete your own checkout
◐ empathy lens↑ drag me to your bookmarks bar
AN HONEST NOTE

Simulation is not lived experience.

The lens approximates. It can't reproduce what it's like to navigate the web this way every day — and it should never replace testing with the people who do. What it's good at: making a team stop arguing about whether contrast "really matters" in about four seconds.

→Feel it here, free. Then measure it: a11y-ray lite →
→Continuous neurodiversity scoring in production: Corexi ↗
→Human-led audit with real assistive-tech users: PX-RAY →