PDF2Advisory technique WCAG 2.4.5 Level AA Human testing required

Add bookmarks so long PDFs are navigable

Bookmarks are the panel down the side of a PDF viewer that jumps you to any section in one click. W3C publishes PDF2 as an advisory technique, and that word matters. Advisory means it helps real readers and is not enough on its own to meet the rule, so treat bookmarks as an improvement you should make rather than a box that closes a finding. The scope W3C gives is long documents, meaning anything past a few pages. Word and InDesign generate bookmarks from heading styles at export, and Acrobat Pro can add them afterwards. Two things people miss. A table of contents only becomes a bookmark if it is marked up with a heading of its own, and a file can be set to show the bookmarks panel the moment it opens.

How we find it in an audit

We open the bookmarks panel and check that long documents have entries matching the section structure. Then we open the PDF with a screen reader and confirm the bookmarks actually move to the right sections rather than just scrolling the view. We also note whether the file is set to display bookmarks on open, because a panel nobody knows to look for helps nobody.

How affected users experience it

Without bookmarks, reaching clause 14.2 of a contract means paging through everything before it. Sighted readers flip and skim. A screen reader user gets no shortcut at all. Long government and financial documents without bookmarks are read-once, front to back.

Passes vs. fails

Passes: one jump past the header. Fails: tab through everything, every page.

Passes

The same PDF exports bookmarks from its heading styles and opens with the panel showing. Every numbered section appears in it, and "7. Early withdrawal" jumps straight to page 64.

Fails

A 120-page pension terms PDF has an empty bookmarks panel. Finding the early-withdrawal clause means reading from page 1.

The other techniques filed under this rule

8 guides on this site are filed under 2.4.5 Multiple Ways. W3C lists this one as advisory for that rule rather than sufficient, which means it helps real readers without being accepted as evidence you conformed.

This guide is our interpretation of W3C technique PDF2: Creating bookmarks in PDF documents. W3C publishes its techniques as guidance rather than as the standard, and says so on every one of them. The success criterion is what conformance is measured against, and a technique is one documented way to meet it.