PDF Accessibility Workbench

Make every PDF
easier to use.

An expert-auditor workbench for PDF evidence collection, WCAG 2.2 AAA-oriented triage, and a practical remediation queue.

1. Upload & Triage
100% Free Audit • WCAG 2.1 AA
2. Remediate & Proof
Free Split-Curtain Visual Diff
3. Download PDF
Spend Credits Only If Satisfied
Step 1 • Document Ingestion

Upload PDF for Accessibility Audit & Triage

Evaluate compliance barriers against WCAG 2.1 Level AA, ADA Title II & III, Section 508, and ISO 14289-1 (PDF/UA-1).

⏱️ 60-Min Auto-Purge 🔒 Private & Encrypted 🛡️ No AI Model Training
Choose a PDF or drag it here
Supports Standard and Scanned PDFs up to 100 MB.
Native structure extraction • Visual geometry preserved.
Automated Compliance Architecture

How ADAPDF.io Works

A deterministic 4-stage compliance engineering pipeline transforming inaccessible, untagged, or malformed PDFs into conforming ISO 14289-1 (PDF/UA-1) and WCAG 2.1 Level AA documents without altering legal layout geometry.

Transform Chaos Into Compliance - Elevate Your Document Workflow Instantly with WCAG and ADA Compliant PDF Remediation
1

C++ Diagnostic Triage

Upload via web, watch folder, or API. Native C++ PDFium and pikepdf engines parse structure trees, reading order, and contrast in ~2 seconds, establishing a baseline score across 31 Matterhorn Protocol 1.1 checkpoints.

⚡ Sub-2s C++ PDFium Engine
2

Smart Auto-Fill & Review

Derives humanized document titles from Page 1 headings, pre-populates contextual figure alt text, and enforces required compliance fields so government staff never publish unverified metadata.

🧠 3-Tier Heading Extraction
3

Non-Destructive Tag Tree Injection

Injects the full ISO 14289-1 tag hierarchy (<Document>, <H1>–<H6>, <P>, <Table>, <Figure>, /Tabs /S, and XMP metadata) into the structural layer with 0.00% visual drift.

🛡️ Zero Reflow Guarantee
4

Visual Proofs & Screen Reader Preview

Verify zero layout drift with our interactive curtain split-slider. Preview how NVDA, JAWS, or VoiceOver vocalize the document in our Assistive Tech Terminal before downloading conforming PDFs.

👁️ 600 DPI Rasterized Proofs
🔒 Layout Preservation

Mathematical Visual Layout Preservation

Unlike legacy converter utilities that re-rasterize pages, strip legal fonts, or reflow typography into distorted HTML, ADAPDF.io operates strictly on the non-destructive PDF/UA object graph. Your legal contracts, municipal permits, court filings, and official state seals remain visually preserved with sub-pixel alignment.

0.00% Visual Layout Drift (0.00 px Reflow)
100% Typography Kerning & Glyph Matching
0.0 pt MediaBox & Bleed Dimensions Locked
31 / 31 Matterhorn Protocol 1.1 Automated Checks
Multi-Channel Ingestion

Built for how your organization works

Whether you need a simple web workbench for compliance officers or automated 24/7 background folder monitoring for high-volume scanning departments, ADAPDF.io delivers four flexible operating modes.

🖥️

Interactive Web Studio

Drag-and-drop document upload, real-time scorecards, smart auto-fill remediation queues, and fullscreen Before/After split comparison studio.

📁

Unattended Folder Watcher

Runs 24/7 as a background Windows Service or Linux daemon. Automatically monitors network scanner folders (SMB/UNC) and publishes compliant outputs instantly.

⚡

Headless REST API

Seamlessly connects to government CMS platforms (Drupal, WordPress, CivicPlus, Granicus) and enterprise document pipelines via POST /api/v1/unattended/remediate.

💻

Batch Systems CLI

Command-line power tool for IT systems administrators clearing legacy archives, processing thousands of PDFs in parallel with structured JSON logs.

⚡ Enterprise Throughput & Scalability

Engineered for high-volume, timeout-proof document pipelines

Remediating multi-hundred-page state legislative records, municipal codebooks, and corporate annual disclosures demands more than basic web scripts. ADAPDF.io is built on a resilient, multi-core asynchronous architecture engineered for zero socket drops, sub-second API polling, and massive batch throughput.

High-Throughput Queue

Asynchronous Batch Job Engine

Documents exceeding 15 pages automatically route to non-blocking background workers, immediately returning HTTP 202 Accepted with a persistent job_id. Completely eliminates browser socket terminations and HTTP 504 gateway timeouts on complex, heavy publication workloads.

Capacity Benchmark: 150+ Page Batches
Multi-Core OCR

Batched Parallel OCR Architecture

Replaces legacy single-threaded OCR with chunked, multi-core worker pools executing up to 8 pages simultaneously. Employs aggressive page-level memory reclamation (≤200MB peak RAM), preventing out-of-memory crashes while synthesizing high-precision searchable text layers with zero visual reflow.

Concurrency & Memory: 8 Cores • ≤200MB RAM
Programmatic Control

REST Status Polling API

Poll remediation lifecycles programmatically via GET /api/v1/jobs/{job_id}. Returns structured JSON telemetry including real-time percent completion, per-page milestone counters, pre/post WCAG scores, and authenticated direct download URLs secured via X-API-Key.

API Latency & Format: <200ms JSON Telemetry
Event-Driven Delivery

Automated Webhooks & Email Callbacks

Seamlessly notify downstream CMS pipelines (CivicPlus, Granicus, Drupal, WordPress) via retry-enabled HTTP POST webhooks upon completion. Optionally dispatches automated stakeholder delivery emails with encrypted download links governed by 60-minute automated privacy lifecycle timers.

Enterprise Dispatch: Webhooks • 60-Min Expiry
Statutory & Regulatory Alignment

Mandates & Standards Enforced

Built specifically to satisfy statutory requirements under federal civil rights laws and state web accessibility mandates:

🇪🇺 European Accessibility Act (EAA Directive 2019/882 • Enforced June 2025) 🇪🇺 EN 301 549 (Harmonised European Standard for ICT Accessibility) 🏛️ ADA Title II (State & Local Gov Mandate • April 2026/2027) ⚖️ ADA Title III (Public Accommodations & Commercial) 📜 Section 508 (Federal Rehabilitation Act) 🌐 WCAG 2.1 & 2.2 Levels A, AA & AAA 📄 ISO 14289-1 (PDF/UA-1 Universal Accessibility) ✓ Matterhorn Protocol 1.1 Checklist
🇪🇺 European Union Market Mandate

European Accessibility Act (EAA 2025) & EN 301 549 Solutions

Enforcement: June 28, 2025

Under Directive (EU) 2019/882 (European Accessibility Act), digital services, e-commerce stores, consumer banking, utility billing, and published electronic documents across all 27 EU member states must achieve strict digital accessibility by June 28, 2025. Crucially, the EAA has extra-territorial jurisdiction: any organization worldwide that sells products, services, or SaaS into the European Single Market must comply or risk market bans and substantial fines.

📜 EN 301 549 Clause 10 Conformance
The official EAA technical benchmark for non-web electronic documents requires PDF/UA-1 (ISO 14289-1) and WCAG 2.1/2.2 AA. ADAPDF.io's deterministic engine automatically satisfies these structural requirements.
🌐 European Multi-Lingual Tagging
Automated document natural language declaration (/Lang) across English, German, French, Spanish, Italian, Dutch, and all EU official languages, ensuring European screen readers apply accurate phonetic pronunciation.
🔒 GDPR Sovereign Data Security
Built strictly to Regulation (EU) 2016/679 standards. Zero AI model training, zero data resale, and an automated 60-minute cryptographic file purge guarantee sovereign confidentiality for European customer documents.

Pre-Flight Diagnostic Boundaries & Active Solutions

Transparent Engineering Commitment

We believe in full transparency before you spend time or credits. Our engine proactively diagnoses specific file boundaries on upload:

Scanned / Pure Image PDFs Scans lack native text streams. Our multi-core parallel OCR engine automatically extracts searchable text underlays and injects compliant PDF/UA tag trees.
Dynamic XFA XML Forms PDF/UA-1 strictly forbids dynamic XFA. The auditor flags dynamic XFA forms for static AcroForm flattening.
Large Volume Publications Documents and publications up to 150+ pages process effortlessly via our asynchronous batch queue with non-blocking status polling and automated webhooks.