
DeveloperToolStack
Free, no-signup developer tools for technical SEO: robots.txt, sitemap.xml and .htaccess generators, plus practical guides. Everything runs in your browser.
RGBlind.com
ColorBlind-Test.io
ColorBlindTest.us
Sight-Check
Venngage WCAG Color Contrast Checker
Visual Field Test
Free online Ishihara color blindness screening test in 13 languages. Instant severity result, downloadable PDF report, and an embeddable widget. No sign-up, no email. Screens for red-green color vision deficiency, not a medical diagnosis.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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IT
Ishihara Test
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|---|---|---|
| Website | fullstacktoolkit.com | ishiharatest.com |
| Pricing | — | |
| Company | — | Startup from Slovakia |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of FullStackToolkit yet.
IshiharaTest.com is a free, no-sign-up online Ishihara color blindness screening test. Based on the classic Ishihara plate method, it gives a fast, private indication of whether you may have a red-green color vision deficiency, along with a difficulty breakdown and a downloadable PDF report. It...
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An editorial look at what each product does well and who it suits.

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How often each product is chosen within a category, 0–100% relative to the other.

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Free color accessibility toolkit with color blindness simulators, WCAG contrast checker, and accessible palette generator for designers and developers.
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