How to Make Your PowerPoint Accessible — Complete Guide

PowerPoint is one of the most widely used document formats in business, education, and government. But most PowerPoint files are not accessible to people who use screen readers, have low vision, or have other disabilities.

In fact, 89% of PowerPoint files we check are missing alt text on at least one image. And that’s just one of many common issues.

This guide walks through every accessibility requirement for PowerPoint files under WCAG 2.1 Level AA — the standard required by Section 508, the ADA, and most organizational accessibility policies. Whether you’re fixing files manually or using an automated tool, you’ll learn exactly what to check and how to fix it.

Why PowerPoint Accessibility Matters

Over 1.3 billion people worldwide live with some form of disability. Many use assistive technology like screen readers (JAWS, NVDA, VoiceOver) to consume digital content — including presentations.

When a PowerPoint file isn’t accessible, a screen reader user might hear “image, image, image” instead of meaningful descriptions. They might miss key content because the reading order is wrong. Or they might not be able to read text at all because the contrast is too low.

Beyond doing the right thing, there are legal requirements:

• Section 508 — Requires all federal agencies and contractors to produce accessible electronic documents
• ADA Title II — The DOJ’s 2024 update requires all public entities (including universities) to make digital content accessible by April 24, 2026
• EU Accessibility Act — Takes effect June 2025, covering products and services sold in the EU
• AODA — Ontario’s accessibility law requires accessible documents from public and large private organizations

1. Add Alt Text to Every Image

WCAG 1.1.1 — Non-text Content (Level A)

Every image in your presentation needs alternative text that describes what the image shows. This is the single most common accessibility failure in PowerPoint files.

How to add alt text manually

1. Right-click the image
2. Select Edit Alt Text (or Format Picture → Alt Text in older versions)
3. Write a concise description of what the image shows and why it’s relevant

Good vs. bad alt text

Tips

• Describe the purpose of the image, not just what it looks like
• For charts and graphs, include the key data point or trend
• For decorative images (borders, backgrounds), mark them as decorative so screen readers skip them
• Keep alt text under 125 characters when possible

2. Check Color Contrast

WCAG 1.4.3 — Contrast (Minimum) (Level AA)

Text must have sufficient contrast against its background so people with low vision can read it. WCAG 2.1 AA requires:

• 4.5:1 contrast ratio for normal text (under 18pt or 14pt bold)
• 3:1 contrast ratio for large text (18pt+ or 14pt+ bold)

Common failures

• Light gray text on white backgrounds (looks subtle, fails contrast)
• Text on photos or gradients where part of the text is unreadable
• Brand colors that don’t meet the ratio (e.g., yellow text on white)

How to fix

• Use a contrast checker tool to verify your color combinations
• Darken text or lighten backgrounds until the ratio passes
• Add a semi-transparent overlay behind text on photos

3. Set the Correct Reading Order

WCAG 1.3.2 — Meaningful Sequence (Level A)

Screen readers read slide elements in a specific order. In PowerPoint, this order is determined by the Selection Pane — but it reads from bottom to top, which is counterintuitive.

How to check and fix

1. Go to Home → Arrange → Selection Pane
2. The bottom item is read first. The top item is read last.
3. Drag items to reorder them so the reading sequence is logical
4. Generally: title first, then body text, then images, then decorative elements

4. Give Every Slide a Unique Title

WCAG 2.4.2 — Page Titled (Level A)

Slide titles let screen reader users navigate between slides by heading — similar to how sighted users scan slide thumbnails. Without titles, users have to listen to every slide sequentially to find what they need.

How to fix

• Use a slide layout that includes a title placeholder (most built-in layouts do)
• If you don’t want the title visible, drag it off the visible area of the slide — it will still be read by screen readers
• Make each title unique and descriptive
• Avoid duplicates like “Continued” or “Slide 5”

5. Set the Document Language

WCAG 3.1.1 — Language of Page (Level A)

Setting the correct language tells screen readers which pronunciation rules to use. A French screen reader will mispronounce English text (and vice versa) if the language isn’t set correctly.

How to set it

1. Go to File → Options → Language (Windows) or Tools → Language (Mac)
2. Ensure the correct proofing language is set as default
3. For multilingual slides, select the text and set its language individually via Review → Language → Set Proofing Language

6. Use Descriptive Link Text

WCAG 2.4.4 — Link Purpose (In Context) (Level A)

Screen reader users often navigate by tabbing through links. If every link says “click here” or shows a raw URL, the user has no idea where each link goes without reading surrounding context.

7. Make Tables Accessible

WCAG 1.3.1 — Info and Relationships (Level A)

If your slides include data tables, screen readers need to know which cells are headers and how the table is structured.

• Use PowerPoint’s built-in table feature (Insert → Table), not text boxes arranged to look like a table
• Mark the first row as a Header Row in Table Design
• Avoid merging cells when possible — it confuses screen readers
• Keep tables simple. If data is complex, consider a chart with good alt text

8. Use Accessible Fonts and Layout

Some additional best practices that improve accessibility:

• Font size: Use 24pt+ for body text, 36pt+ for titles. Smaller text is hard to read in presentations.
• Font choice: Use sans-serif fonts (Arial, Calibri, Verdana) for better readability. Avoid decorative fonts for body text.
• Avoid text in images: Text in images can’t be resized, searched, or read by screen readers. Use real text elements instead.
• Use built-in layouts: PowerPoint’s built-in slide layouts have proper content placeholders with correct reading order. Custom layouts often have issues.

Quick Checklist

Before sharing or publishing any PowerPoint file, run through this checklist: