Are LinkedIn Carousels Accessible?

This question gets asked far less often than it should, and the honest answer is uncomfortable: a LinkedIn carousel is one of the least accessible things you can post. Not because LinkedIn built it badly, but because of what a carousel fundamentally is — words drawn onto pictures. A picture of a sentence is not a sentence, and software cannot tell the difference between a beautifully typeset slide and a photo of a cat.

The good news is that the fixes are cheap, they take a few minutes per post, and most of them make the carousel better for everyone rather than worse. Here is what actually breaks and what to do about it.

Why are LinkedIn carousels hard for some people to read?

Start by being precise about what a carousel is, because two different things share the name.

• A document post — you upload a PDF (or a PowerPoint or Word file) and LinkedIn shows it as swipeable pages. This is what most people mean when they say “LinkedIn carousel”.
• A multi-image post — between 2 and 9 separate images in one post that the reader swipes through.

(Carousel ads are a paid LinkedIn Ads format and a different thing again. This article is about the organic, unpaid kind.)

Both share the same accessibility problem: the text is not text. When you design a slide in a graphics tool and export it, every letter becomes part of a picture. To assistive technology — software that helps people use a device, such as a screen reader that speaks the page aloud — that slide is a rectangle of colour with no meaning inside it.

So the people most affected are:

• Blind and low-vision readers using a screen reader (VoiceOver on iPhone, TalkBack on Android, NVDA or JAWS on a computer). Without alt text, the reader is told an image exists and nothing more.
• People who zoom. Zooming into an image makes it blurry rather than reflowing the text, so magnification helps far less than it does with normal writing.
• People with colour vision deficiency — roughly, colour blindness — if your slides use colour alone to mean something.
• People with low bandwidth or images turned off, who get nothing at all.
• Anyone using translation. A browser or phone can translate a caption. It cannot translate a picture of a sentence.

That last group is a useful reminder that this is not a niche concern. The same barrier that stops a screen reader also stops search, translation, copy-and-paste, and the AI assistants people increasingly use to summarise their feed.

Do screen readers read the text on a carousel?

Not the text inside the slides, no. A screen reader can only announce what it is given: the post caption, the poster’s name, the visible interface buttons, the document title if there is one, and alt text if someone wrote it.

There is one partial exception worth knowing. A PDF exported from a real design or word-processing tool usually still contains a selectable text layer underneath the visual page. If the post offers a download and the reader downloads the original file, that text layer may be reachable in their own PDF reader. That is a genuine fallback, but it is a poor one: it requires several extra steps, it fails entirely if the PDF was exported as flat images, and it does nothing for someone scrolling the feed. Treat it as a bonus, never as your plan.

Can you add alt text to a LinkedIn carousel?

Partly, and the answer differs by format.

LinkedIn moves its interface around, so rather than trusting a set of menu steps that may be stale by the time you read this, look for the alt text control on the attached image in the composer and check LinkedIn’s own help pages if you cannot find it.

Writing useful alt text is a skill, and most people get it wrong in the same two ways. Do not describe the design (“slide with purple background and bold heading”) — describe the information. And do not start with “Image of”; the screen reader already says it is an image.

• Weak: “Slide 3 of the carousel.”
• Better: “Step 3: send the draft to one customer before you publish it.”

If a slide is genuinely decorative — a cover image with no words that matter — a short, plain description is fine. Do not pad it.

What should the caption do?

This is the single highest-value fix, and almost nobody does it. The caption is the only part of a carousel post that is real, readable, translatable, searchable text. Treat it as the accessible version of your carousel, not as a teaser for it.

The common habit is the opposite. A caption reads “Swipe for 5 lessons from our first year →” and stops. For a reader who cannot swipe into images, that post contains no lessons at all — it is an advertisement for content they will never receive.

A better pattern, which costs you nothing in reach and quite possibly helps you:

• Open with the point of the carousel in one plain sentence.
• List the actual takeaways — the headline from each slide, or a short summary of the argument. Numbered lines work well here.
• Close with whatever call to action you were going to use anyway.

Someone who can see the slides skims the caption and swipes. Someone who cannot still gets the whole idea. And as a side effect, your post now contains searchable words, which a picture never will.

This is also where publishing tools matter in a small but real way. If you write and publish through an assistant — for example with Kalovio, which connects LinkedIn to Claude or ChatGPT so you can publish a multi-image or PDF carousel by chatting — you already have the slide text sitting in the conversation. (Both of those formats go through LinkedIn’s newer versioned interface, which is not switched on for every self-serve app, so try it on your own account; a refusal is reported plainly.) Asking for a caption that summarises the slides in plain text takes one sentence, and it is the difference between an accessible post and a locked one.

How do I get contrast and colour right?

Two rules cover most of it, and both come from the Web Content Accessibility Guidelines (WCAG), the W3C standard that most accessibility law and policy points at.

Contrast. WCAG 2.1 asks for a contrast ratio of at least 4.5 to 1 between text and its background for normal-size text, and 3 to 1 for large text. Carousel slides are big, so most of your type counts as large — but the popular design habits are exactly the ones that fail: pale grey on white, thin white type over a photograph, a light brand colour used for body copy. Free contrast checkers will tell you the ratio in seconds; paste in your two hex codes before you commit to a template.

Never let colour carry the meaning on its own. WCAG puts this in its own rule, and it is easy to break without noticing. If red boxes mean “mistake” and green boxes mean “fix”, a reader with colour vision deficiency sees two similar boxes. Add a word, an icon, or a position that says the same thing. A slide labelled “Don’t” and “Do” works in greyscale; a slide that only changes colour does not.

A quick check: view your slides in greyscale. If you can still tell what everything means, the colour is decorating the information rather than carrying it.

How big should the type be?

Bigger than you think, for a reason specific to accessibility: on an image, zooming does not help. Normal text reflows and sharpens when someone magnifies it. Your slide just gets blurry. So the size you export is effectively the smallest size anyone will ever be able to read comfortably.

Practical consequences: put far less on each slide, avoid long paragraphs in small type, avoid thin or highly stylised typefaces for anything that matters, and give text room to breathe rather than filling the frame. If a slide needs a magnifying glass on a phone, it needs to become two slides.

(Layout for small screens is a bigger topic in its own right — this section is only the accessibility slice of it.)

A short checklist before you post

• Does the caption contain the actual message in plain text, not just a swipe prompt?
• Have you written alt text on each image (multi-image), or a meaningful title (document post)?
• Does every text and background pair pass a contrast check?
• Does the slide still make sense in greyscale?
• Is the type large enough to read on a phone without zooming?
• Have you avoided cramming a paragraph into a corner in small type?

Does making a carousel accessible make it worse?

Generally the opposite, and the reasons are practical rather than moral. Fewer words per slide and larger type is the same advice good carousel designers give anyway. Strong contrast survives a dim screen and bright sunlight. A caption that carries the message is readable by people who never open the slides, by translation tools, and by search — and a post whose entire content is trapped in pictures is invisible to all three.

You will not make a carousel perfectly accessible; the format has a ceiling, and a document post in particular has a real gap where per-page descriptions ought to be. But the distance between “no accessible content at all” and “the full message available in text” is one well-written caption. That is a small price for not excluding part of your audience.