Choosing HTML or accessible PDF
Source-backed explanations and practical guidance. Educational information, not a legal determination.
Choose for the user task
Hypertext Markup Language (HTML) and Portable Document Format (PDF) can both be implemented well or poorly. HTML is not automatically accessible, and PDF is not automatically inaccessible. Compare the user’s task, screen size, authoring source, update process, and records requirements before choosing a format.
When responsive HTML is worth evaluating
Consider HTML for service instructions, frequently updated information, searchable directories, and content people need to navigate on small screens. Semantic headings, meaningful links, accessible forms, and responsive layout still have to be implemented and tested. A good template does not fix every authoring error. W3C’s page-structure tutorial describes structural foundations.
When a PDF may serve the task
A downloadable, fixed-version artifact may be useful for offline work, printing, or a defined records process. Those needs do not remove accessibility requirements. Verify the file’s text, structure, reading order, alternatives, and controls. Section508.gov’s PDF guidance explains evaluation and authoring considerations.
Compare the real maintenance work
- Can the source be corrected and republished reliably?
- How will changes be checked in each format?
- Does the content require forms, tables, charts, or signatures?
- Can people complete the task on mobile and with assistive technology?
- Who owns the record and approves replacing or retaining versions?
No page-count threshold or assumed cost comparison decides the answer.
An accessible alternative is not an automatic exemption
Under Title II § 35.202, conforming alternate versions may be used to comply with § 35.200 only where technical or legal limitations prevent making the content directly accessible. Simply posting an HTML copy alongside an inaccessible covered PDF is not a general shortcut. Read the alternate-version provision.
Coordinate accessibility and preservation
Do not delete, replace, or alter a record under a preservation hold or retention requirement without the responsible authorization. The required record format and retention period depend on the applicable records rules and facts; this page does not invent a universal PDF-retention requirement. Plan accessible delivery and record preservation together.