Social Media Accessibility: A Platform-by-Platform Guide for Small Businesses

Making your social media accessible comes down to three habits: write your own alt text on every image (each platform has a built-in field for it), capitalize each word in your hashtags, and caption every video. None of it costs money or requires a developer — the hard part is simply finding where each platform hid the alt-text field, because every one of them put it somewhere different.

This guide shows you exactly where those fields live on Instagram, Facebook, X, and LinkedIn as of July 2026, using each platform’s own documentation. Ten extra seconds per post is the entire investment.

Why accessible posts are worth your time

More than 1 in 4 U.S. adults live with some type of disability, according to the CDC. Some of those people are your customers, and many of them experience your posts through a screen reader — software that reads the screen aloud. When a screen reader hits a photo with no description, the user gets silence, or a useless filename, or a machine’s guess.

The fix is alt text: a short written description attached to the image. As Perkins School for the Blind explains, alt text “has to be added manually across all social media platforms” for blind and low-vision users to know what’s in an image — and adding it “takes less than a minute” per post.

There’s a selfish reason too. A restaurant post that says “photo” tells a blind customer nothing. One that says “Friday special: blackened catfish po’boy with remoulade, $14” makes the sale. Accessibility and marketing are the same job here.

Where every platform hides its alt-text field

Here’s the cheat sheet. Character limits are as reported by Perkins School for the Blind; the field locations come from each platform’s own help docs, linked in the sections below.

Platforms move these buttons around in redesigns, but the pattern holds: the field is always there, always optional, and never where you’d first look.

How do I add alt text on Instagram?

Before posting, the alt-text field sits behind the Accessibility option on the caption screen. Per Instagram’s help center: choose your filter and edits, tap Next, tap Accessibility, write the alt text in the box, then share. In some app versions the same field appears under Advanced settings as “Write alt text.”

Already posted? Instagram lets you fix it. Open the post, tap the three-dot Options menu, tap Edit, then Accessibility, write your description, and tap Done (Instagram Help).

Instagram also generates automatic alt text with image recognition, but it produces the machine-guess variety — “photo of one person, food.” Your own 100 characters beat that every time. The writing rules are the same ones we cover in our alt text guide: say what matters, skip “image of,” and include any text that’s baked into the graphic.

How do I add alt text on Facebook?

When you upload a photo, hover the image, click Edit, then choose Alternative text in the left menu — those are the steps from Facebook’s help center. Facebook writes alt text for you automatically, and that’s exactly why you should check this screen: you’ll see the auto-generated description, and clicking Custom alt text lets you replace it with your own. Then Save.

The auto-generated version is deliberately cautious — often just “may be an image of text” or “one person, smiling.” For a business page announcing a sale, that’s a missed sale.

To fix a photo that’s already live: open it, click Options in the top right, select Change Alt Text, type your description, and save (Facebook Help).

How do I add alt text on X and LinkedIn?

On X, click Add description under an uploaded image on desktop, or tap the +ALT button in the image’s corner on mobile, write your description, and save — the steps documented by Accessible Social, a practitioner-run reference for these platform quirks. X gives you a generous 1,000 characters, and posts with descriptions display a small ALT badge on the image that any reader can tap to see your text.

The catch: X alt text cannot be edited after posting. If you forget it or typo it, the only fix is deleting the post and starting over (Accessible Social). Make it part of your pre-post check there.

On LinkedIn, after you upload an image to a post, click the Alt.text button below the image on desktop — or tap ALT on mobile — write the description, and save. LinkedIn’s official help page notes the text “won’t be visible to members not using screen readers,” so it never clutters your post. Treat it as write-before-you-share: LinkedIn’s help page documents adding alt text only at upload, not editing it afterward, so get it right the first time.

Write hashtags in CamelCase

Capitalize the first letter of every word in a hashtag: #ShopLocal, #TacoTuesday, #SmallBusinessSaturday. As Accessible Social puts it, “lowercase and uppercase letters help a screen reader identify separate words, allowing it to pronounce the hashtag correctly.” Without the capitals, a multi-word tag gets read as one run-together garble — or in the internet-famous worst cases, parsed into words you never intended (#susanalbumparty).

Capitalization doesn’t change how hashtags function. #TacoTuesday and #tacotuesday land in the same feed; one of them just also works when read aloud.

Two related copy habits while you’re at it. Put emoji at the end of the post rather than mid-sentence — screen readers announce each one by name (“face with tears of joy”), which shreds a sentence when they’re scattered through it. And skip the fancy Unicode “fonts” some tools generate for bold or script text in captions; those are special characters, not real letters, and screen readers often can’t read them at all.

Caption every video, then proofread the captions

Captions are the alt text of video: they’re how deaf and hard-of-hearing customers get your message, and how everyone else watches with the sound off on a bus. Instagram, Facebook, and LinkedIn all offer auto-generated captions on video now — turn them on, but don’t trust them blind. Auto-captioning reliably butchers proper nouns: your business name, your town, your product. Review and correct before publishing.

The same standard applies with legal weight on your own website, where captions on prerecorded video are required by WCAG 1.2.2, a Level A criterion. Our guide to video captions and transcripts covers formats, tools, and what “good” looks like.

One more visual habit: if your post graphic has text on it — a sale banner, a quote card — make sure the text contrasts strongly with the background. The color contrast rules that govern websites exist because low-vision users genuinely can’t read pale gray on white, and that’s just as true in a feed.

The 60-second pre-post checklist

Tape this next to whoever runs your accounts:

1. Alt text written for every image, in the platform’s own field — what’s in it and why it matters, including any text on the graphic.
2. Hashtags in CamelCase — #LikeThisExample.
3. Video captioned, and the auto-captions proofread for names and prices.
4. Emoji at the end, used sparingly, never as a substitute for words.
5. Text on graphics is high-contrast and repeated in the caption or alt text.
6. The link works — and goes somewhere a disabled customer can actually use.

That last item is the one most businesses never think about.

Your posts are accessible — is the site they link to?

Every social post is an ad for one destination: your website. A blind customer who follows your beautifully alt-texted post to a booking page with unlabeled form fields, or a checkout that can’t be finished with a keyboard, hits a wall at the exact moment they tried to give you money. The barriers on your own site are also where ADA website compliance risk actually lives — plaintiffs sue over websites, not Instagram grids.

The social habits in this post take a minute each. Finding out whether your website holds up its end takes about the same: run our free accessibility scan and see what a screen-reader user hits when your next post sends them your way.