Accessibility Tools

See what
others miss.

Two tools for accessibility professionals who take their work seriously.

Vesper is a suite of accessibility tools developed by Steven Trotter, refined through daily use auditing library websites. The name comes from the ancient word for evening, when Venus — the brightest star — first becomes visible. Vesper is about illuminating what others overlook.

Vesper Inspect — Chrome Extension

Inspect any element, instantly.

Hover over any element on a page and Vesper surfaces its accessibility attributes in a clean overlay — ARIA labels, roles, alt text, tab order, image file sizes, and more. No DevTools required.

  • ARIA label, role, and accessible name computed from the full ACCNAME algorithm
  • Alt text on images with red/amber/green status — flags missing and empty alt
  • Tab order and keyboard reachability, including ancestor context for nested elements
  • Phone and email link checks — flags raw numbers and addresses missing descriptive labels
  • Highlight mode: scan the whole page for missing alt text or unlabeled links
  • Three-state header — teal (clean), amber (tip), red (error) at a glance
  • Mouse mode and Tab mode — tooltip follows cursor or stays fixed top-right
Chrome Extension — Manifest V3
library.org/services
LM INSPECTOR
Element <a>.services-btn
ARIA label none
Acc. name Children (text content)
Role link (implicit)
Tab order ✓ reachable by keyboard

Vesper Audit — macOS Desktop App

Vesper Audit
https://yoursite.org Audit
09:14:02✓yoursite.org/
09:14:03✓yoursite.org/events
09:14:04⚠yoursite.org/borrow — 3 violations
09:14:05✓yoursite.org/about
09:14:06→Checking 84 external links…
47 Pages scanned
12 Violations
35 Clean pages

Full-site audits, no configuration.

Vesper Audit crawls your entire website using axe-core and generates detailed accessibility reports as Markdown files or Notion pages. Built for the way accessibility professionals actually work.

  • Crawls every internal page using your local Chrome install via Puppeteer
  • Runs WCAG 2.2 A/AA checks with axe-core on every page found
  • Collects all PDFs and external links during the crawl — reports locations and flags broken URLs
  • Exports to Markdown files or syncs directly to a Notion page hierarchy
  • WCAG violations and Best Practices reported separately
  • Platform-level suppressions for known Drupal CMS false positives
  • Import and export per-client settings — audits your way, every time
macOS — Electron + Puppeteer + axe-core