World Wide Web Consortium, Web Accessibility Initiative · reviewed 2026-10-10
What this source supports: PDF guidance includes text alternatives, logical structure, headings, keyboard order, and labeled form controls.
Source limit: Techniques support evaluation; they are not a complete certification by themselves. Test the actual document and format.
These sources support the statements above. They do not show that every person needs this guide. They do not show a specific result.
Limits
This guide counts coverage from your own audit. It does not write labels or tag the PDF.
Techniques support evaluation; they are not a complete certification by themselves. Test the actual document and format.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Common questions
What does the App compute?
Turn field counts into the unlabeled-field count and a label coverage percent for the form.
What does the App not do?
This App counts coverage from the numbers you enter. It does not write labels or tag the PDF.
Where do the numbers come from?
You enter every number yourself. The sources support the method and the limits. They do not produce a result for your specific case. Keep the original documents next to the sheet you build.
Before you start
Open the linked source page and keep it beside you.
Gather the values the App asks for:
Form fields in the PDF.
Fields with a real label.
Set aside ten quiet minutes; rushed numbers are the main error this guide prevents.
Free Companion App
The App computes the worked example with your own numbers, in your browser.
APP 1
PDF Form Label Coverage Check
Turn field counts into the unlabeled-field count and a label coverage percent for the form.
This guide is edited for clarity and checked against the sources it links. It is not a substitute for official instructions or qualified advice. A linked source does not show that every person needs this guide.