ALT Text Services for PDFs

Automating Accessible ALT Text Creation for PDFs at Scale

  • Process entire media libraries, product catalogs, and image archives with enterprise-grade accuracy and speed
  • WCAG 2.1 compliant, SEO-aligned ALT text, generated with AI, supervised by domain experts
Get Your ALT Text Generation Proposal

Success Stories

...it's all about results

Educational Publishing

Educational Publishing

Fixed Layout eBook Conversion with Accessibility Compliance for Complex Educational Content

Read More
Information Services

Information Services

Delivered Digital Remediation Support – Web Accessible PDF Conversion with WCAG 2.1 & 2.2 (AA) Standards

Read More
Academic

Academic

Converting Complex, Multi-Format Content into Universally Accessible ePub3

Read More
Academic/STM Publishing

Academic / STM Publishing

PubMed, JATS, NLM-Compliant XML Conversion for Scientific, Technical, and Medical Content

Read More
Publishing

Publishing

Delivering WCAG-Compliant ePub3 Content for a Leading European Publishing Solutions Provider

Read More

View All

AI-ASSISTED ALT TEXT WRITING SERVICES

Comprehensive ALT Text Solutions for Custom PDF Requirements

Most organizations are sitting on a "Dark Archive"—thousands of PDFs invisible to screen readers, search engines, and a significant part of their target audience. Creating ALT text for those PDFs can seem as simple as clicking 'Auto-Tag' in Adobe Acrobat or running them through an AI, but it only gets you 60% of the way there.

That 40% gap is where "unusable" experiences, compliance-related lawsuits, and reputational damage live.

That is where SunTec India assists businesses with human-verified compliance-aligned ALT text writing services. With a custom-trained AI model and a human-in-the-loop review process, we translate complex visual data—such as STEM diagrams, financial charts, and technical schematics—into meaningful narratives at enterprise scale.

AI-DRAFTED, HUMAN SUPERVISED ALT TEXT SERVICES

Protect Your Brand from the Risks of Close Enough ALT Text Descriptions

Compliant ALT text service from SunTec India is the difference between “A man in a suit holding a leather bag” and "Our CEO, John Doe, arriving at the 2025 Global Climate Summit to present our sustainability initiative." We don’t just describe what an image or formula is; we describe what it means within the context of your document. Our multi-tiered approach handles everything from simple icons to high-complexity data visualizations, offering you defense against lawsuits and access to a wider audience.

Scientific & Academic Publishing

Scientific & Academic Publishing

Detailed descriptions for multi-panel figures, maps, and labeled diagrams.

Corporate & Financial

Corporate & Financial Reporting

Accurate interpretation of complex ROI charts, workflows, and organizational structures.

Technical Documentation

Technical Documentation

Contextual ALT text for software screenshots and UI elements to guide user workflows.

Government Compliance

Legal & Government Compliance

Precise ALT text ADA compliance, ensuring all public-facing PDFs meet ADA Title II, Section 508, and WCAG 2.2 standards.

OUR SERVICES

Specialized ALT Text Services for PDFs: Find the Right Service for Your Situation

Whatever you need, from PDF accessibility remediation services, SEO ALT text optimization, and WCAG compliant image descriptions to manual ALT text validation, SunTec India delivers. Our team is equipped to help you transform PDFs into structured, inclusive, and screen-reader-ready documents from the first page to the last with ALT tag writing services.

Automated PDF Remediation

Automated PDF Remediation with Human QC

Best for: Large archives, backlogs, content migrations

We scan your entire PDF library, auto-tag structural elements (headings, lists, tables), classify visuals by complexity, and generate ALT text drafts at scale. Every output passes through human QC before delivery, getting you from zero compliance to auditable compliance, fast, without sacrificing accuracy on the documents that matter most.

Manual ALT Text Writing Services

Manual ALT Text Writing Services

Best for: Legal, medical, financial, scientific, and government documents

For complex documents — such as legal briefs, medical reports, government publications, or complex scientific material — automated ALT text generation is insufficient. We engage certified domain specialists to carefully review AI‑generated descriptions and ensure every image, chart, graph, and diagram reflects the correct context, intent, and meaning required for accurate accessibility. This human‑assisted layer of our ALT text writing service ensures that ALT text not only meets compliance standards but also conveys the informational value of visuals to users who rely on assistive technology.

Custom Accessibility-Related Fixes

Custom Accessibility-Related Fixes

Best for: Organizations with ongoing PDF production at volume

We focus on ensuring your PDF documents meet specific legal and technical compliance requirements such as WCAG (Web Content Accessibility Guidelines), Section 508 of the Rehabilitation Act, PDF/UA (ISO standard for accessible PDFs), and ADA (Americans with Disabilities Act) standards. Our document conversion team addresses unique challenges, including semantic tagging, logical reading order, metadata enhancements, link text fixes, and form field accessibility.

Real-Time Publishing Integration

Real-Time Publishing Integration

Connect accessibility processes directly into your document workflows.

Whether you publish via CMS platforms, automation pipelines, or templated systems, we make sure that ALT text generation, tagging, and accessibility checks occur as part of your publishing cycle, not as a separate after‑the‑fact task. Real‑time integration helps ensure every PDF you produce is accessible from day one, reducing rework and helping you maintain compliance without disrupting your existing publishing rhythm.

ALT TEXT SERVICES: PROCESS

Designed for PDF Production Realities

To ensure your PDF library is both legally compliant and truly functional, the transition from "visual image" to "accessible text" cannot be left to a single, unmonitored algorithm. Our image ALT text service solves this with a hybrid intelligence framework that utilizes a "Human-in-the-Loop" architecture.

SUPERVISED

Define Ideal Customer Profile (ICP)

  • Establish client-specific style guides to ensure AI-generated descriptions align with your brand voice and technical requirements.
  • Identify the document’s core purpose and feed these "contextual anchors" into our AI to ensure the descriptions serve the narrative.
  • Define client-specific target regulatory standards—WCAG 2.2, PDF/UA, ADA, or Section 508—to calibrate the output for legal auditability.

SUPERVISED

Structural Tagging & Classification

  • Structure the document's visual assets into logic-based "buckets" (Simple, Medium, Complex) to streamline processing
  • Manually identify non-informative elements (swirls, dividers, generic stock photos) as "Artifacts," so the AI focuses only on meaningful data
  • High-stakes visuals—such as STEM diagrams and financial charts—are pre-flagged for priority human expert review

AUTOMATED

Context-Aware ALT Text Generation

  • Our proprietary AI engine extracts images, charts, and formulas from the PDF’s visual layer
  • The AI reads the "surrounding signal"—capturing headers, captions, and adjacent prose to determine the image’s role in the narrative
  • Our multimodal vision models generate high-fidelity, initial ALT Text drafts that are contextually anchored to the page content

HUMAN

Subject Matter Expert (SME) Validation

  • SMEs intervene on flagged items, ensuring that ambiguous or data-heavy assets are contextually and mathematically accurate
  • If an image lacks clear nearby text cues, reviewers assess intent to ensure the description provides real value
  • We manually repair image/data extraction errors caused by low-quality scans, merged background elements, or cropped borders

SUPERVISED

Final ALT Text QC and Delivery

  • Scan for "voice" alignment and eliminate repetitive, robotic, or vague AI phrasing to ensure a professional, human-sounding finish
  • Perform rigorous "spot-check" validation using industry-standard screen readers like JAWS and NVDA
  • Final delivery includes a compliance confirmation that the documents meet the mandated WCAG 2.2, ADA, or PDF/UA standards

Mitigate Legal Risk. Comply With Global Regulations.

Scientific & Academic Publishing

ADA

Americans With Disabilities Act

Scientific & Academic Publishing

EAA

European Accessibility Act

Scientific & Academic Publishing

Sec 508

Technical Requirements

Scientific & Academic Publishing

AODA

Ontarians With Disabilities Act

Scientific & Academic Publishing

ACA

Accessible Canada Act

Contact Us

CONTACT US

Start with a Free Sample of AI-Assisted ALT Text Writing Services for PDFs

Most teams don't know how much meaning their current ALT text is losing — until they see the before-and-after side by side.

Send us five PDFs from your existing library. We'll return them with fully written, human-verified ALT text — at no cost — so you can evaluate the quality of our work against what you have today, before any contract conversation begins.

FAQ: FREQUENTLY ASKED QUESTIONS

ALT Text Services for PDFs

ALT text services for PDFs provide alternative text that explains the meaning or purpose of a visual element, usually added to ensure digital accessibility compliance (WCAG/Section 508), so that screen readers and other assistive technologies can identify and read the description for each visual. Our ALT text services assist publishers across scientific & academic publishing, corporate & financial reporting, government, and technical domains by:

  • Creating ALT text for accessible PDF remediation
  • Ensuring compliance with WCAG, ADA, PDF/UA, and related accessibility standards
  • Adding ALT text to PDFs for better search engine indexing and visibility

Turnaround depends on three variables: total page count, the proportion of complex visuals requiring SME review, and your target compliance standard. Simple, image-light PDFs move through our pipeline significantly faster than STEM-heavy or financial documents that require expert validation. You can get a closer turnaround estimate by sharing your requirements at info@suntecindia.com.

A generic AI describes what it sees in isolation. It has no knowledge of your document's purpose, audience, or the narrative the image is serving. Our proprietary model reads the surrounding signal — headers, captions, adjacent prose — to generate alt text that reflects what the image means within its specific context, not just what it visually contains. That output then passes through SME validation, ensuring complex visuals like financial charts or STEM diagrams are contextually and mathematically accurate. This is the defining differentiator you get with SunTec India — a layer no off-the-shelf AI provides.

We sign NDAs before any document exchange, and your files are never stored on our systems post-delivery. SunTec India is ISO and CMMI Level 3 certified, with documented data-handling protocols that meet enterprise security standards. For organizations in regulated industries, these protocols are available for review before any engagement begins.