Express WCAG 2.2 audit of a URL or an HTML string: 20+ automated signals with a weighted 0-100 score — images without alt (1.1.1), controls without accessible names (4.1.2), form fields without labels (3.3.2), missing autocomplete on user-data fields (1.3.5), click handlers on non-interactive elements (2.1.1), unknown ARIA roles and broken aria-labelledby (4.1.2), duplicated unnamed landmarks, timed meta refresh (2.2.1), missing skip mechanism (2.4.1), lang/title (3.1.1, 2.4.2), heading structure (1.3.1), blocked zoom (1.4.4), captions (1.2.2), autoplay audio (1.4.2), generic/duplicated link text (2.4.4), target=_blank without warning (3.2.5), positive tabindex (2.4.3), aria-hidden on focusable elements, tables without th, duplicate ids, duplicate accesskeys. Each finding includes concrete remediation. Filter, not verdict: automation covers ~1/3 of WCAG; query a11y_criterion for what a criterion means.

Deep RENDERED WCAG audit via local Playwright/Chromium: real computed text contrast against effective backgrounds with alpha compositing (1.4.3), minimum target size 24×24 (2.5.8, new in WCAG 2.2), visible focus indicator heuristic (2.4.7), plus rendered versions of the static checks (alt, accessible names, labels, headings, lang/title, tabindex, aria-hidden, captions, tables). Findings include remediation. Requires playwright: pip install playwright && playwright install chromium.

Exact WCAG contrast ratio for a color pair: per-criterion verdicts 1.4.3 (AA), 1.4.6 (AAA), 1.4.11 (non-text). Accepts #hex, rgb(), hsl(), CSS color names; rgba/hsl with alpha is composited over the background. If AA fails, suggests the nearest passing color.

TEXT OVER IMAGE contrast: pixel-level sampling of the real background behind the text box → worst/median/p95 ratio, % of area passing AA, and automatic hostile-zone detection on a 3×3 grid (zona_peor). What pair-only checkers cannot do. region="x,y,w,h" recommended.

Nearest opaque color (RGB distance) to fg that reaches the target ratio against bg (4.5 default). Returns the color, its ratio and whether it lightens or darkens.

Generates an Accessibility Statement in HTML: art. 10 RD 1112/2018 (Spanish public sector, marco="rd1112") or European Accessibility Act wording (Directive (EU) 2019/882 / Ley 11/2023, marco="eaa"; EN output uses Directive (EU) 2016/2102 / EAA wording). The generated document is itself accessible. Saves to output_path when given.

Accessibility snapshot of a URL: interactive elements (tag, role, accessible name, href) in DOM order, the REAL tab focus order, and when Playwright ≥1.49 is available the computed ACCESSIBILITY TREE (aria snapshot — what a screen reader announces). Save it before a deploy and compare after with a11y_diff. Requires local Playwright.

Regression diff between two accessibility snapshots (before/after a deploy): added/removed/renamed interactives and focus-order changes. ok=false means a regression to review. Accepts inline JSON (starting with "{") or file paths.

Snapshot two URLs and diff them in a single call (e.g. staging vs production). Requires local Playwright.

Returns injectable JavaScript for an aria-live announcement monitor (bookmarklet or page.evaluate): logs every dynamic-region announcement with time, politeness, role and text — what a screen reader would say, visible on screen.

Returns an HONEST accessibility badge as accessible SVG: score, date and scope (automated screening ≈ 1/3 of WCAG), color-coded by score. Deliberately does NOT say "conformant" — the honest seal. Embed it in audited sites or statements.

DETERMINISTIC safe auto-fixes applied to HTML — the honest anti-overlay: a short closed list of fixes where the correct answer is unique (unblock viewport zoom 1.4.4, add the exact autocomplete token 1.3.5, fill missing html lang and empty title when provided). Everything requiring judgment (alt text, contrast, accessible names) is NOT touched — it returns no_aplicados with the reason and remediation instead. Returns fixed_html + aplicados + no_aplicados.

Reflow check at 320px — criterion 1.4.10 (AA), the check axe and Lighthouse do not automate. Loads the URL at 1280px, then at 320px, and reports real horizontal scroll + the overflowing elements. Method note: browser zoom RE-LAYS OUT at 320 CSS px (that is the standard's own equivalence: 1280 @ 400% zoom = 320px), so the correct measurement is a 320px viewport. Requires local Playwright.

Keyboard-trap detection (2.1.2) with REAL Tab walking in Chromium: up to 60 real tab stops, cycle detection (the modal pattern), then the decisive test — does ESCAPE release the cycle? A modal that cycles and releases on Escape is correct and NOT reported; a cycle Escape cannot leave is a trap (high severity). Returns the full tab stop list too. Requires local Playwright.

Infinite-scroll accessibility audit — the documented disaster nobody automates (Deque guidance + ARIA APG Feed pattern; criteria 2.4.3, 4.1.3, 2.2.2). Real scrolling batches in Chromium with a live-region observer: does the focused element SURVIVE each batch (re-render destroys it — the documented failure)? Is new content ANNOUNCED (aria-live/status receives text, role=feed)? Does the feed END or offer a load-more alternative (footer reachability)? APG feed pattern as positive signal. Honest guard: if no standard items are detected (login walls, non-standard markup) the unfounded signals are skipped with a note. Requires local Playwright.

Explains a WCAG 2.2 success criterion in plain language (es/en): what it requires, typical failures, and how to verify it with this toolkit (which tool automates which part). Codes like "1.4.3", "2.5.8", "4.1.2". Use it whenever you need to explain WHY a finding matters or what the criterion actually says.