Frequently Asked Questions (FAQ)

veraPDF is an open-source PDF validator covering all parts of the PDF/A and PDF/UA (Matterhorn Protocol Machine failure conditions) standards. Originally funded by the PREFORMA project, veraPDF has been sustained and maintained by the Open Preservation Foundation since 2017. Dual Lab provides active user support and carries out maintenance and bug fixes. The PDF Association’s PDF/A Technical Working Group continues its role in resolving ambiguities arising from veraPDF’s usage in the field.

Yes. It is industry supported open-source standard with active maintenance and PDF community governance. It validates PDF/UA requirements, highlights common tagging and structure errors, and produces validation reports you can trust. See the full list of PDF/UA validation profiles.

veraPDF outputs HTML, XML, or JSON with detailed findings, errors, and fail summaries.

Use the veraPDF Web Demonstrator or the PDFix online validator (pdfix.io) to run PDF/UA checks directly in your browse.

Yes. veraPDF is free and open-source – you can download it, use it, and modify it to meet your needs.

If you encounter a validation result that appears incorrect, we encourage you to report it on the veraPDF GitHub issue tracker or reach out to the Open Preservation Foundation. Community feedback is essential to improving veraPDF. You can also volunteer your time and expertise by contributing to the software and documentation via GitHub (https://github.com/veraPDF)

Auto-tagging adds invisible structure tags to your PDF (like headings, lists, tables, and images) so that assistive technologies – such as screen readers – can interpret and navigate the content correctly. PDFix Desktop automates this process, saving hours of manual tagging.

The best method depends on your document type: Basic Auto-Tagging – ideal for quick fixes and mixed layouts. Preflight Auto-Tagging  – detects document structure automatically. AI-Generated Templates  – best for complex or variable layouts. Pre-Defined Templates  – perfect for repetitive files like invoices or reports.

AI auto-tagging with PDFix Desktop is highly accurate for complex layouts, as it uses machine-learning models (e.g., Amazon Textract) to recognize structure and generate templates automatically. You can review and refine tags afterward to achieve 100% compliance.

Yes. PDFix Desktop supports batch auto-tagging, allowing you to process entire folders or document sets simultaneously. This is ideal for organizations managing large archives, ensuring all PDFs meet accessibility standards efficiently.

No coding skills are required. PDFix Desktop provides a visual, drag-and-drop interface with automated tagging options. You can create or import layout templates without writing code, making it suitable for accessibility specialists, designers, and non-developers.

Yes. PDFix offers both Desktop and SDK solutions, so developers can integrate the same auto-tagging logic directly into workflow pipelines, document management systems, or automated PDF generation processes.

You can create a manual layout template in a JSON file that defines how PDFix should recognize elements such as tables, headers, and anchors across pages. If you have programming or technical skills, you can build the template yourself by following our Layout Template Guide.Otherwise, simply send us a sample document, and our team can create a custom template for you so you can apply it and see exactly how it works and review the output results before scaling it for batch auto-tagging.

PDF/UA (Universal Accessibility), defined by ISO 14289-1, is the standard for making PDF documents fully accessible for people using assistive technologies (e.g. screen readers). It ensures that the document’s structure (tags, reading order, semantics) is correctly defined so that users can navigate, read, and interact with content. Without PDF/UA compliance, a PDF might appear visually correct but remain inaccessible in practice.

Different validators can interpret the PDF/UA or WCAG rules differently, implement distinct logic, or cover different subsets of validation rules. Each tool may apply different heuristics or fallback logic for complex cases. Some rules require human judgment, which can’t be fully automated. Rule coverage, severity thresholds, and error reporting formats differ. As a result, it’s common for one validator to flag an issue another overlooks. The inconsistencies don’t mean one is wrong — they reflect variation in implementation.

No. Automated tools can detect many structural, tagging, and rule-based issues, but they cannot fully assess context, meaning, or design intent (e.g. whether alt text conveys the right meaning, or whether the reading order truly matches human expectations). Thus, best practice is to combine automated validation with manual review and human expert checks.

There is no one-size-fits-all best validator. Popular tools include veraPDF, PAC, Adobe Preflight PDF/UA, or CommonLook PDF Validator — each with its own strengths and trade-offs in rule coverage and reporting depth. Using multiple validators in tandem is often recommended to cross-check results, compare error reports, and complement them with manual review.

When reading a validation report, consider: Re-test — after remediation, re-run validators and compare reports to ensure improvements. Severity & context — not all flagged issues are equally critical. Focus first on errors (not just warnings). Rule descriptions vs. tool-specific explanations — understand the underlying standard (e.g. ISO 14289, WCAG) rather than relying solely on the tool’s wording. Prioritize fixes — address structural, tagging, and navigation issues first. Then refine alt text, reading order, metadata, etc.

You can find all our past and upcoming webinars in the Webinar category on pdfix.net. More recorded sessions are also available on our YouTube channel: Team PDFix

Absolutely! You can follow along and experiment using the same materials. All the documents and JSON template files are available for download on our GitHub: Weekly Market Sample

Yep, everything you see in this webinar is replicable in the SDK. See a separate webinar for auto-tagging with PDFix SDK.

Templates can be created with the Preflight function in PDFix Desktop, using an AI model, or manually. Template examples are available on GitHub.

Yes, it’s possible. If you need help creating one, just contact us — we can assist with multi-page and repeating layouts.

Yes, that’s correct. Templates can be generated automatically using AI. PDFix Desktop then applies them to fix and enhance the tagging structure.

Some AI models require credentials, some don’t. PDFix Desktop offers a free AI layout models such as Paddle.

PDFix Desktop offers a free AI layout models such as Paddle which does not require credentials.

Yep! You can train and prepare your own model, then integrate it easily into PDFix.

We continuously work on imtegration of new LLM models into PDFix Desktop, including Microsoft Azure. Please check for PDFix Marketplace updates.

Yes! We offer an external OCR action that can be applied before auto-tagging. It automatically adds an OCR text layer to scanned PDF files. Learn more here: OCR Tesseract Action

Yes, we have an external Table Summary mode that improves table readability for LLMs: Generate Table Summary with OpenAI

We support both OpenAI and Paddle for MathML detection.

Tagging PDF Forms is challenging, but possible. Each form field is properly tagged based on PDF/UA standard. The form field descriptions can be auto-generated from field names or tooltips.

Manually created templates can handle auto-tagging of complex layouts. If you need help creating one, just contact us — we can assist with complex layouts.

Not completely. PDFix relies on the open-source veraPDF tool for PDF/UA validation. You can learn more here: PDF Accessibility Validators

Yep! Check our related blog and webinar here: How to automate fixes in InDesign created PDFs

Yes, exactly! You can use the free BLIP or paid OpenAI model for automatic Alternate Text generation.

Constantly. External actions are updated whenever new versions are released. PDFix SDK and Desktop are updated at least quarterly — or more often if needed.

Yes, it is possible to use Podman instead of Docker Desktop for running external actions integrated with PDFix Desktop.PDFix Desktop supports actions that can be distributed through the PDFix Marketplace or installed manually using an action configuration file (JSON).Each action configuration file defines: Action metadata — such as name, category, and subtype, enabling integration into specific workflows (e.g., template creation or tag editing). Program execution pattern — including the command-line call and its arguments. Argument definitions — allowing customization of how the action runs and interacts with PDFix Desktop. Because the action system executes external programs through command-line calls, Podman can be used in the same way as Docker Desktop or any other CLI-based container runtime.Example: Executing the Action with Docker docker run -v $(pwd):/data -w /data –rm pdfix/autotag-textract:latest \ tag –aws_id ${AWS_ID} –aws_secret ${AWS_SECRET} –aws_region ${AWS_REGION} \ -i /data/input.pdf -o /data/output.pdf Example: Executing the Same Action with Podman podman run -v $(pwd):/data -w /data –rm pdfix/autotag-textract:latest \ tag –aws_id ${AWS_ID} –aws_secret ${AWS_SECRET} –aws_region ${AWS_REGION} \ -i /data/input.pdf -o /data/output.pdf Since Podman provides a Docker-compatible command-line interface, no additional configuration changes are required in the PDFix action definition.Simply replace docker with podman in the execution command. For detailed guidance on creating or installing custom actions, please contact us.

Create or sign in to your AWS account (console). Create an IAM user (or use an existing one) and enable Programmatic access so it can get access keys. When you create the access key pair, save the secret — AWS shows the secret only once. AWS Documentation Attach Textract permissions to that user/role. For testing you can attach the managed policy AmazonTextractFullAccess; for production prefer least-privilege (grant only the textract:* actions you need). AWS Documentation Create the access key for that IAM user (Access Key ID + Secret Access Key) via the IAM → Users → Security credentials → Create access key UI. Store those credentials securely (see storage below). AWS Documentation

Paddle is currently supported only for layout recognition in auto-tagging and template workflows. It does not include OCR functionality.At the moment, Tesseract is the only OCR engine supported in the PDFix Marketplace. Please check for future updates that may add OCR support for Paddle or other engines.

PDF/UA (PDF/Universal Accessibility) is the ISO standard (ISO 14289) that defines how PDFs must be structured to be accessible to people using assistive technologies such as screen readers. PDFix Desktop includes a built-in PDF/UA validator to ensure every document meets both PDF/UA and WCAG requirements, helping organizations achieve accessibility compliance faster.

Desktop Pro (350 €): Designed for professionals and small teams. Includes AI-powered auto-tagging, remediation tools, layout template mapping for complex documents, PDF conversion, and custom accessibility commands. Desktop Enterprise (1 000 €): Includes all Pro features, plus advanced tools for high-volume document processing with batch automation – ideal for organizations handling large numbers of PDFs every week.

Yes. Both Pro and Enterprise editions of PDFix Desktop include all minor updates and improvements. This ensures you always have the latest features and compliance checks without extra costs.

Yes. You can download a free trial of PDFix Desktop to explore auto-tagging, OCR for image-based or scanned PDFs, AI-driven remediation features, and PDF/UA compliance validation before upgrading to the full license.

Accessible reports ensure that employees, clients, and partners with disabilities can use the information. Beyond inclusivity, it also protects companies from compliance risks under PDF/UA, WCAG, and Section 508.

The fastest way is to use an automated layout template. With tools like PDFix, you set accessibility rules once (headings, tables, alt text, reading order) and apply them to reports automatically.

Common issues include missing headings and reading order, untagged or complex tables without headers, charts or infographics without alt text, and PDFs exported from CRM systems without semantic structure.

Manual fixes can work for a few files, but if you generate dozens of reports weekly, it quickly becomes unsustainable and expensive. Automation saves 90% of the time and ensures consistency.

Yes. PDFix templates can detect charts that need alternative text descriptions, column headers in large tables, repeating structures like KPI dashboards, and anchors for recurring sections.

Not at all. Templates work for client-facing business reviews, weekly sales reports, high-volume invoices, bank statements, annual sales reports, and annual financial statements.

No. With an in-house automated solution like PDFix, you eliminate the need for outsourcing or building large remediation teams — while keeping data secure inside your company.

AI-powered auto-tagging means using artificial intelligence to detect and tag document elements automatically instead of manually. With PDFix + Amazon Textract, every PDF page is analyzed for structure (headings, tables, forms) and converted into a JSON template that ensures consistent tagging. This is faster, more accurate, and more scalable than manual tagging or Adobe’s basic auto-tag function

Scanned or image-only PDFs are converted into images. Amazon Textract applies advanced OCR and layout recognition to detect text blocks, tables, and forms. PDFix then builds a JSON template and applies tagging back onto the original PDF. The result is a fully searchable, accessible, and PDF/UA-compliant file — even from raw scans.

Reusable logic: One JSON template can tag thousands of similar PDFs. Consistency: Ensures the same structure (tables, headers, reading order) across batches. Scalability: Process millions of pages without manual tagging. Compliance: Meets PDF/UA and WCAG standards reliably. This makes JSON templates a game-changer for enterprises working with invoices, bank statements, insurance forms, and other high-volume documents.

Yes. You can integrate PaddlePaddle (open-source deep learning), or other custom AI models. This flexibility means you can choose the AI model that delivers the best accuracy for your industry and integrate it with PDFix. We’re constantly adding state-of-the-art AI models, which you can find in our Marketplace.

Open the PDF in PDFix Desktop. Go to Actions → Make Accessible (includes Auto-Tag, sets Language & Title, creates Bookmarks, embeds Fonts for PDF/UA compliance). Open the Validation side panel and click Validate (PDF/UA-1). Apply Auto-Fix or Quick Fix, use manual edits if needed, then validate again until status is Passed.

Make Accessible is an automated one-click workflow that clears old structure, runs Auto-Tag (or Auto-Tag with Paddle AI), sets Document Language and Title, creates Bookmarks, embeds Fonts, and prepares the file for PDF/UA validation and fixes.

Auto-Tag quickly builds a semantic tag tree. Make Accessible runs Auto-Tag plus key metadata and font embedding steps — making it the best starting point for fast PDF/UA results.

In the Template side panel you can define rules for headings, tables, figures, reading order, and artifacts. Templates standardize recognition and boost accuracy on complex layouts. Use them to fine-tune detection when Auto-Tag alone isn’t perfect.

Open the Validation side panel. Click Validate (PDF/UA-1) or Validate With to select a profile. Review results, apply Auto-Fix or Quick Fix, and re-validate until Passed.

Yes. In the document view, choose Run Action → Accessibility → AutoTag( Paddle), or AutoTag(AmazonTextract) to try an alternative AI-powered engine that can improve detection on certain layouts. We’re constantly adding new models, which you can find in our marketplace.

Auto-Fix provides one-click repairs for frequent problems. Quick Fix offers targeted commands for specific issues such as missing language or bad list structure. Manual Fix can be used for complex issues via the Tag Tree, Bookmarks, Content, or Annotations panels.

After Auto-Tag or Make Accessible, open the Tag Tree and Content panels to verify order from top to bottom. You can even convert PDFs to HTML to preview the reflowable layout and verify the correct reading order.

PDFix detects many decorative items and marks them as artifacts automatically. If something is missed, select the object in the Content panel and mark it as Artifact.

If an image is decorative, mark it as an Artifact instead of adding alt text. In the Tag Tree, select the Figure tag and add concise, meaningful Alt text. You can also run an action to automatically add alt text to images using PDFix, OpenAI, or Saleforce BLIP. We’re constantly adding new models, which you can find in our marketplace.

To make PDF annotations accessible, you need to add alternative text using the Contents key (or TU key for form fields). Tools like PDFix Desktop allow you to set or overwrite annotation descriptions—such as link destinations or highlight text—ensuring compliance with PDF/UA and WCAG standards.

The most efficient way is to use the Set Annotation Contents action in PDFix. It can automatically generate descriptive text for links (e.g., “Go to Page 3”) and extract content from highlights using bounding boxes. You can also define custom text or use action destinations for full accessibility coverage.

Yes. According to the PDF/UA standard (ISO 14289-1), all non-text annotations must have meaningful alternative text for assistive technologies. Without this, screen readers cannot convey what the annotation represents—causing compliance failures. PDFix makes this process seamless and repeatable.

The most scalable way to auto-tag structured PDFs is by using a template-based layout recognition system like PDFix. You define a single JSON file that tells the engine what to tag and where, then apply it across thousands of files without manual editing.

Yes. PDFix supports automatic PDF/UA-compliant tagging using semantic elements (<h1>, <p>, <table>, etc.). With the right JSON template, you can generate accessible documents that pass compliance checks without manual tagging. Read more about PDFix Template logic – a rule based layout engine defined in JSON.

The template is a JSON configuration file that defines elements by position, text pattern, style, or anchors. PDFix SDK uses this file to recognize and tag structures like headers, tables, and footers across any number of PDF files. Read more about Layout Template.

Yes, it’s ideal. Bank statements and invoices usually follow a predictable layout. PDFix templates are perfect for batch-tagging structured documents like monthly financial reports, utility bills, or receipts.

Absolutely. The PDFix SDK can be embedded into any document automation pipeline (Windows, Linux, or cloud-based). Deutsche Bank, for example, integrated it without disrupting their existing workflow.

You can use PDFix Desktop for visual layout analysis and template creation, then run batch operations using the PDFix SDK CLI or your own script. No coding is needed to start.

You’ll find all working examples on GitHub under PDFix_SDK_Example_Templates.

You can use Set Content Color action in PDFix Desktop to automatically adjust fill and stroke colors of PDF objects. This helps improve readability and meet accessibility standards without manual editing.

Yes. With PDFix Desktop, you can define rules to change colors across text, paths, and shapes in bulk using a JSON template. This is ideal for correcting entire documents quickly.

It’s a new PDFix action that lets you apply custom color filters to content based on type, fill, stroke, or other properties. Also, you can selectively target and change colors using the object_update.

Use the Set Content Color feature to ensure proper color contrast (as defined by WCAG guidelines). This is a critical step for creating WCAG and PDF/UA-compliant documents that support screen readers and low-vision users.

Yes. You can define filter rules in JSON to match only specific fill and stroke color values (e.g., red 255,0,0) and update them to new colors (e.g., black 0,0,0), ensuring accurate and consistent adjustments.

PDFix supports updates to any page object – including text, paths, and vector graphics – defined via the object_types parameter in your template. You can match based on color, object type, or custom filters.

Absolutely. PDFix’s Set Content Color is designed to integrate with PDF remediation pipelines. It’s especially useful for organizations working on accessibility at scale – such as banks, finance, government agencies, and digital publishers.

The U.S. Department of Justice (DOJ) has finalized new ADA Title II web accessibility rules. Smaller entities and special districts: must comply by April 26, 2027.These deadlines apply to websites, mobile apps, and digital documents — including PDFs. Large entities (50,000 + population): must comply by April 24, 2026.

Yes. The DOJ explicitly includes PDF documents under ADA Title II. Any downloadable or online PDF must be accessible to screen readers and follow WCAG 2.1 criteria, such as proper tags, alt text, and logical reading order.

Use PDFix Desktop to auto-tag and repair existing PDFs, or PDFix SDK to integrate accessibility directly into your workflow.. The tools analyze document structure, detect headings and tables, and apply accessibility tags automatically – reducing manual remediation time while ensuring PDF/UA and WCAG compliance. Explore real-world results to see how Board of Governors of the Federal Reserve System and U.S. Citizenship and Immigration Services use PDFix to automate compliance at scale.

Educational institutions can use PDFix Desktop to tag syllabi, course materials, and administrative forms. For large volumes, PDFix SDK allows automated remediation directly in existing learning management systems (LMS) and campus workflows — helping schools meet WCAG compliance faster. Read more in our University Case Study to see how PDFix streamlines accessibility at scale.

Yes, the PDFix SDK supports multiple programming languages including Python, C++, Java, .NET, and JavaScript. It is cross-platform and runs on Windows, Linux, and macOS.

You can explore the list of Batch Actions available under documentation. While we currently don’t link PDF standard clause numbers directly to actions, we’re working on adding this mapping. For now, feel free to contact us for guidance on addressing specific issues.

There is no hard limit. We’ve successfully processed PDF files with over 12,000 pages. Performance may depend on system resources, but generally, the SDK can handle large documents efficiently. For monitoring long operations like auto-tagging, progress monitoring can be implemented – contact us for an example.

Yes! Use the Create Bookmarks action in the PDFix Actions. If your PDF has headings in its structure, this action will auto-generate bookmarks. Check our documentation for implementation details.

PDFix SDK doesn’t support PDF reconstruction from XML. Instead, it provides direct PDF editing functions – modifying content, links, page assembly. For specific needs, review our GitHub examples or email us for guidance.

Accessibility features, including auto-tagging, require the PDFix SDK Enterprise license.

The auto-tag function removes the entire existing structure by default. However, for fixing pre-tagged documents – for example those from InDesign – refer to our webinar, which covers custom remediation workflows.

Absolutely! Modify the script to iterate through all files in a directory—it can handle any number of PDFs.

PDF/UA (ISO 14289-1) is the international standard for accessible PDF files. PDFix supports creating and validating PDF/UA compliance across PDFix Desktop, SDK, and free online tools.

Upload your file to the Validate PDF/UA tool on pdfix.io. It runs veraPDF validation to test against ISO 14289 rules and returns a machine-readable report. No sign-up required.

No. PDFix validation verifies machine-checkable rules. Human review is still required to confirm logical reading order and alt-text quality. See PDF Validation overview.

You can use the free Make PDF Accessible tool to automatically generate a tag tree – headings, paragraphs, lists, tables, and figures – and convert your document into a structured, accessible PDF. For large-scale processing, PDFix Desktop provides the same functionality with batch automation.See our easy step-be-step guide: How to Make a PDF/UA-Compliant PDF in Minutes with PDFix Desktop › Developers can also use the PDFix SDK CLI commands.

Yes. Upload your file online to pdfix.io/autofix or run the Auto-fix tool in PDFix Desktop after validation to resolve machine-detectable issues. Re-validate to confirm the fixes.

Yes. PDFix Desktop Lite includes veraPDF validation and runs on macOS, Windows, and Linux.

The presence of a watermark in your document output is a limitation of the Lite version.

You can download the trial version here. It includes full product features, with the limitation being watermarked document output after saving.

The Lite version includes the following limitations: Saved PDFs may have redacted parts of the content, Methods that extract text from the PDF content randomly replace characters with “*”, Rasterized images may contain logo watermark.

To ensure accurate validation results, it’s essential to have Java installed on your computer. You can download Java here.

Ensure your system meets these prerequisites before installing PDFix: Windows: Windows 10 or newer, along with the latest Microsoft Visual C++ Redistributable for Visual Studio 2019, macOS: macOS 10.15 or later, Linux: Ubuntu 18.04 or newer, or CentOS 8 or newer.

The EAA mandates that digital products and services – including downloadable documents such as PDFs used in banking, e-commerce, transport, telecom, etc. – must be accessible to people with disabilities. While it doesn’t explicitly name “PDF”, it references the standard EN 301 549 which maps to WCAG and, by extension for PDF documents, to PDF/UA (ISO 14289-2:2024)

The key dates are: new products/services launched after 28 June 2025 must comply. Existing offerings may have a transitional period up to 28 June 2030 to fully align.

An accessible PDF must have a semantic tag tree with headings, lists, tables, alt text for images, meaningful reading order, navigable structure, form labels if applicable, and compatibility with assistive technologies. This matches PDF/UA requirements and aligns with WCAG.

By embedding accessibility into your document generation workflow via tools and SDKs (such as template-driven outputs, auto-tagging engines, APIs for reading order / alt text / metadata) so that each PDF is compliant from the start rather than remediated afterwards.

Yes – if your service falls under the EAA’s scope (e.g., online banking statements, invoices, reports) and you serve EU users, you are subject to compliance regardless of your location.

Many organizations want to know how to check whether their existing PDFs actually meet accessibility standards. The best approach combines automated PDF accessibility validation – to detect missing tags, incorrect reading order, or missing alt text – with a manual review to ensure semantic accuracy and logical structure. This hybrid method helps you prioritize fixes, create reliable templates, and maintain long-term compliance. For a deeper look at validation profiles, testing workflows, and how different accessibility checkers compare, read our detailed guide on PDF/UA-1 Accessibility Validators Comparison.

WCAG defines accessibility rules for all web and digital content, while PDF/UA (ISO 14289) focuses specifically on the structure and tagging of PDF documents. The best approach is to use both together, ensuring full alignment with EN 301 549 requirements.

You can automate tagging using PDFix Templates, which recognize layout patterns and apply consistent structure. This enables batch auto-tagging for invoices, bank statements, and reports – turning repetitive PDFs into accessible, compliant documents in seconds.

AI-generated alt text automatically creates meaningful descriptions for images, charts, and figures. In PDFix Desktop, you can run OpenAI on batch documents directly in the Application View via the integrated Docker image. OpenAI is built into PDFix Desktop, so you can simply run the action without adding an external step.

Yes. PDFix helps you add, review, and validate alternate text across figures to support PDF/UA, WCAG, and Section 508 requirements. Validation can be performed instantly, as PDFix Desktop includes the industry-standard built-in validator VeraPDF with always up-to-date validation profiles.

Absolutely. PDFix offers batch processing to apply AI-generated descriptions across multiple PDFs, including selective tagging options (e.g., skipping decorative icons) and audit-friendly outputs with consistent file names and directory structures.

You’re not locked in. PDFix External Actions are model-agnostic: you can start with OpenAI via Docker and integrate other engines as they become available. Docker supports both on-premises and private-cloud deployments, ensuring full alignment with your organization’s security and data-privacy policies.

Teams typically report significant time savings with high-quality first drafts. Best results come from a quick human review—refine technical terms, avoid duplicating captions, and ensure each description matches user intent and document context.

PDF to HTML conversion transforms static PDF documents into dynamic, web-friendly HTML files. This process is essential for improving accessibility, mobile responsiveness, and search engine optimization (SEO) of your documents, making them easier to share and view online.

PDFix uses an intelligent Layout Recognition Algorithm to analyze and structure untagged PDFs. This advanced tool automatically identifies elements like text, images, and tables, ensuring accurate and efficient conversion to HTML.

Yes, our tool uses advanced OCR (Optical Character Recognition) technology to convert scanned PDFs into responsive HTML.

Absolutely. PDFix is designed to handle both individual and bulk conversions efficiently. Our tools are scalable, making them ideal for businesses and organizations with high-volume document processing needs.

You can test our free online PDF solutions or explore PDFix Desktop Pro for advanced features. Watch our interactive demo video for a step-by-step guide to help you get started.

You can use PDFix Desktop Lite, a free accessibility checker powered by veraPDF, to analyze your document. It validates structure, tagging, and reading order, and generates a detailed report showing any accessibility issues and how to fix them.

The most reliable PDF/UA validators include veraPDF, PAC (PDF Accessibility Checker), Adobe Preflight, and CommonLook Validator.For the best results, use multiple tools together, since each validator may detect different issues or interpret rules slightly differently.

Yes — PDFix Desktop Lite is the only free PDF accessibility validator available for macOS. It provides full PDF/UA validation, HTML preview, and detailed accessibility reports.

Check out our in-depth blog post PDF/UA-1 Accessibility Validator Comparison to see how different tools analyze the same PDF and how to interpret results effectively.

The Matterhorn Protocol defines a detailed list of technical checks required for PDF/UA compliance. It helps validators, like PDFix and veraPDF, perform consistent accessibility testing and report precise errors across all documents.