Web standards can be dense when read solely as specifications. This playground translates official W3C, WHATWG, and IETF requirements into live, hands-on tools to help developers and designers verify compliance and understand the science behind modern standards.
Enter any website URL to audit live HTML accessibility against normative WCAG 2.2 Level AA requirements and emerging WCAG 3 candidate functional outcomes with code snippets and exportable reports.
Evaluate color pairs against normative WCAG 2.2 relative luminance ratios alongside the experimental WCAG 3 / APCA perceptual algorithm. Features real-time color vision deficiency simulation.
Interactive policy builder for Content-Security-Policy (CSP), HSTS, and Permissions-Policy. Features real-time risk linting, breaking change warnings, and multi-platform configuration export.
Experiment with focus indicators while verifying compliance with WCAG 2.2 SC 2.4.11 (Focus Not Obscured, AA) and SC 2.4.13 (Focus Appearance, AAA) with interactive sticky viewport obstruction testing.
Every experiment in this playground adheres to our strict development standards:
We clearly distinguish between legally enforceable, ratified W3C Recommendations (like WCAG 2.2) and experimental candidate drafts (like WCAG 3 APCA) to ensure accurate compliance decisions.
All tools run on native browser APIs and vanilla TypeScript custom elements. No heavy frameworks, no external trackers, and zero CSP-violating dynamic scripts.
Security tools evaluate breaking changes and deployment prerequisites before recommending enforcement, highlighting the necessity of report-only staging and TLS validation.
Mathematical checks provide instant feedback on isolated styles, but cannot replace physical keyboard testing, assistive technology validation, and human review.
Review the formal, authoritative documentation behind these interactive experiments:
Normative requirement for normal and large text contrast
Restricting execution sources to prevent cross-site scripting (XSS)
Ensuring keyboard indicators remain visible and unobscured by sticky content