Get Taggart
It runs in your browser
No install, no licence file, no platform question. Open it, drop a PDF in, and you have the findings in about a second.
What the free validator does
- Every machine-checkable Matterhorn Protocol failure condition
- PDF/UA-1, WCAG 2.1 Level AA and IS 5568 profiles
- Right-to-left analysis: visual-order detection for Hebrew and Arabic
- Screen-reader preview — exactly what a reader announces, in order
- Structure tree with per-element geometry
- JSON report
Unlimited. No page cap, no watermark on anything, no expiry, and no account required. Checking is commoditised — three good free tools already do it — so charging for it would only send you to one of them.
What a plan adds
- Remediation, with the appearance gate on every export
- The reading-order editor
- Right-to-left logical-order repair
- The remediation report, with the human-decision audit trail
What happens to your documents
A signed-out check is processed and discarded. Nothing is stored, and nothing is logged beyond the fact that a check ran.
Signed in, a check is stored only if you tick the box, and uploads expire after seven days. Alt text generation offers a fully local mode in which image bytes never leave the process.
Telemetry is off by default, opt-in, and never includes document content. This audience reads the privacy policy and checks with a proxy, which is the right instinct. The policy →
Desktop and command line
A desktop build and a CLI for CI pipelines are in the Pro tier and are not yet released. When they are, they will appear here and in the changelog — not before. We would rather say what is shipping than what is planned.