Accessibility on social media is usually framed as something you do for a small group of users. That framing undersells it. Captions help anyone watching with the sound off. Plain language helps a reader skimming on a phone in bright sun. Alt text helps search engines understand your image. Building accessible posts makes your content usable by more people and, as a side effect, widens your reach.
This guide covers the concrete practices: writing alt text, captioning video, keeping text readable, and handling emoji and hashtags so screen readers do not turn them into noise.
Alt text that actually describes
Every image on social should carry alt text, the short written description screen readers announce in place of the picture. Most platforms have an alt text field tucked in the advanced settings of the upload screen. Good alt text is specific and functional, not decorative.
| Weak alt text | Strong alt text |
|---|---|
| “photo” | “Barista pouring latte art into a white cup on a wooden counter” |
| “our product” | “Dashboard screen showing a weekly posting calendar with four scheduled posts” |
| “team pic” | “Five colleagues laughing around a meeting table with laptops open” |
Describe what matters for the point you are making. If a chart shows growth, say so in the alt text rather than describing the colours. If text appears inside the image, repeat that text, because a screen reader cannot read pixels. This is the same instinct that makes strong social media content quality work: be specific enough to be useful.
Caption and subtitle your video
Most people watch social video on mute, so captions are not optional. They serve viewers who are deaf or hard of hearing, and they keep the silent-scroll majority watching. Two layers help:
- Open captions burned into the video, which always show regardless of player settings.
- Closed captions uploaded as a separate track, which viewers can toggle and which platforms can index.
For short-form video, burned-in captions are the safer default because they survive being downloaded and reshared. When you build Instagram Reels from website content or other short clips, treat captions as part of the edit, not an afterthought.
Readable contrast and text
If you put words on an image or video, they need to be legible against the background. Aim for strong contrast between text and what sits behind it, and add a solid band or shadow when text floats over a busy photo. A few habits go a long way:
- Avoid thin light-grey text on white or pale backgrounds.
- Keep on-image text large enough to read on a small phone.
- Do not rely on colour alone to carry meaning, since not everyone perceives colour the same way.
- Left-align body text; centred blocks are harder to scan.
These choices also lift performance for everyone, because a post nobody can read in the feed gets scrolled past regardless of who is reading.
Emoji and hashtag etiquette for screen readers
This is where well-meaning posts quietly break. Screen readers announce every emoji by its name and read hashtags as one run of characters. A line of decorative emoji becomes a long, exhausting string of spoken words.
- CamelCase your hashtags. Write
#SocialMediaTips, not#socialmediatips. Capitalising each word lets a screen reader pronounce the words separately, and it is easier for everyone to read. - Use emoji sparingly and intentionally. One emoji that adds meaning is fine. Ten in a row read aloud as a tedious list.
- Do not replace words with emoji. A screen reader announcing “fire fire fire” in place of “great” loses your point.
- Put hashtags at the end, so the readable message comes first and the tags do not interrupt the sentence.
Your hashtag strategy from website content should bake CamelCase in from the start, so accessibility is automatic rather than a fix you apply later.
Plain language carries everything
Accessible writing is plain writing. Short sentences, common words, and a clear point near the top help readers with cognitive disabilities, non-native speakers, and the merely distracted, which is most of your audience. The discipline overlaps almost entirely with good social media caption writing : lead with the value, cut the throat-clearing, and make one point per post.
A quick test: read the caption aloud. If you stumble or run out of breath, it is too dense for a screen reader and too dense for a thumb-scroller.
Why accessibility widens reach
The reach argument is the one that gets accessibility funded. Captions keep silent viewers watching, which lifts watch time, which platforms reward with distribution. Alt text gives search and recommendation systems real text to work with. CamelCase hashtags get surfaced more reliably. Plain language gets understood and shared. Accessibility and reach are not in tension; the same practices serve both, and they feed directly into a healthier social media engagement strategy .
This is part of why Utin treats alt text and captions as first-class fields when it turns website content into posts, rather than optional extras you remember to fill in later. If accessible-by-default publishing matters to you, you can register interest in the early pilot.
A pre-publish accessibility check
Before any post goes out, run a short pass:
- Does every image have specific alt text?
- Is the video captioned, and are burned-in captions legible?
- Is on-image text high-contrast and large enough?
- Are hashtags CamelCased and parked at the end?
- Is the caption plain enough to read aloud in one breath?
Fold this into your existing content review checklist so it happens on every post without anyone having to remember. Accessibility done at the checklist stage is cheap. Retrofitted across a back catalogue, it is painful. Build it in once and it simply becomes how you post.