Frequently Asked Questions
A mix of questions about poofPDF specifically, and about PDF/document accessibility more generally. This list is a starting point; we'll keep expanding it.
What does it actually mean for a PDF to be “accessible”?
An accessible PDF can be read and navigated by assistive technology, not just seen. That means real text (not a scanned image), a logical heading/reading-order structure, alt text on meaningful images, labeled tables, and text that's readable at low vision or with a screen reader. See the W3C Web Accessibility Initiative for the full picture, and our How To page for how these concepts map to what poofPDF actually checks.
How does PDF accessibility help with SEO, GEO, AEO, and AI search?
Accessible PDFs replace image-only or poorly ordered content with searchable text and clear structure. That gives search engines such as Google and Bing better material to crawl, understand, and add to their index, supporting SEO. It can also help AI search systems and other models, including large language models (LLMs), retrieve, interpret, and summarize the document more reliably. Those benefits overlap with AIO (AI optimization), GEO (generative engine optimization), and AEO (answer engine optimization). Accessibility does not guarantee rankings, citations, or inclusion in an answer, but it removes technical ambiguity that can keep useful content hidden from people and machines.
Does poofPDF actually change my PDF, or just tell me what's wrong?
Both. The checklist tells you what's wrong in plain language, and the Export tab can produce a corrected file two ways: a safer patch that keeps your file's exact appearance and adds/repairs structure tags, or a full rebuild that redraws every page and reconstructs structure from the content poofPDF can analyze. See How to export a fixed PDF for a full walkthrough of both options.
Am I legally required to make my PDFs accessible?
It depends on who you are and where you operate. U.S. federal agencies and many state/local governments fall under Section 508, and private businesses increasingly face ADA-related expectations for their digital content. We're not a law firm — check those sites, or talk to counsel, for anything that needs a definitive answer.
Does poofPDF upload my file anywhere?
No — as currently provided, analysis and export both run entirely in your browser. Your PDF is never sent to a server. See our Privacy Policy for the full details, including any optional server-involved features we add later.
What's the difference between a “tagged” PDF and a regular one?
A tagged PDF has a hidden structure tree layered underneath the visible page content — headings, paragraphs, tables, lists, and figures marked as what they actually are, in reading order. Without it, a screen reader only sees a loose bag of text and images with no relationships between them. This is the core idea behind the PDF/UA standard. See how this maps to poofPDF's own checklist.
What's the difference between “Patch original PDF” and “Rebuild & Tag”?
Patch keeps your file byte-for-byte identical in appearance and only adds or repairs structure tags where they can be safely matched to what's already there — recommended for most files. Rebuild & Tag discards the original and redraws every page from this tool's own analysis and may recover structure that cannot be patched, at the cost of possibly shifting fonts or spacing. Neither strategy guarantees PDF/UA certification. Full walkthrough on the How To page.
What other tools can I use to check my PDF's accessibility?
Besides poofPDF's own checklist, Adobe Acrobat and Microsoft Word/PowerPoint both ship built-in accessibility checkers, and screen readers like NVDA exist for manual testing. We cover several of these on the How To page — we'd genuinely rather you check your work with more than one tool than trust any single one, including ours.
Will poofPDF guarantee my PDF passes an accessibility audit?
No. poofPDF is a best-efforts remediator, not a PDF/UA certification service. Legacy, government, scientific, and highly interactive PDFs may retain technical validator findings involving malformed or incomplete font-to-Unicode data, form-field labels and annotation tags, complex table structure, or ambiguous legacy/vector content that cannot be changed safely without risking meaning or appearance.
A remaining technical finding does not, by itself, describe the practical keyboard or screen-reader experience. Our goal is that remediated documents remain readable, navigable, and operable with assistive technology, but important files still need manual testing. As a demanding public benchmark, download the official IRS Form 1040 PDF and compare it before and after remediation with the veraPDF PDF/UA validator. If reading order, controls, tables, or announced content are not accessible, please let us know.
Does poofPDF fix color contrast automatically?
It can, as an opt-in — it's the one category of fix that actually repaints pixels rather than just adding metadata, so we ask you to explicitly acknowledge that trade-off first. Our checking is thorough, including a final pass that re-audits the exact bytes you're about to download, but nobody's perfect, including us. See how contrast fixing works for the full picture.