# Do you need alt text on social media posts?

> Yes, whenever a platform supports it. Alt text is what makes an image post usable for someone using a screen reader, & skipping it excludes part of an audience from content everyone else can access.

Updated: 2026-09-25.

## Why alt text matters here specifically

A screen reader reads alt text aloud in place of an image it can't otherwise describe. Without it, an image post is effectively invisible to a visually impaired follower, no matter how good the actual visual is. Alt text is what turns "there's an image here" into an actual description someone can understand without seeing it.

This isn't a minor accessibility nicety, it's the difference between a post being usable or not for a real part of any audience, one that's easy to forget precisely because the people affected by its absence aren't the ones writing the caption.

## What makes alt text actually good

- Describes what's actually in the image, specifically, not a vague "photo" or "image"
- Mentions relevant text visible in the image, since a screen reader won't otherwise read on-image text
- Stays reasonably concise, a full paragraph is harder to follow read aloud than a clear sentence or two
- Skips decorative detail that doesn't add to understanding the actual content

Alt text that just repeats the caption verbatim usually isn't describing the image at all, it's describing what the caption already said, which misses the actual point of the field.

## Why alt text gets skipped in practice

Writing alt text takes an extra minute per post, & when it's a separate, easy-to-forget field tucked away in a platform's upload flow, it's one of the first things dropped under time pressure. This isn't usually a deliberate choice to exclude anyone, it's a process gap: the field exists, but nothing in the normal workflow prompts someone to actually fill it in.

## Making alt text a normal step, not an extra one

Treating alt text as part of finishing a post, the same as writing the caption itself, rather than an optional field to fill in if there's time, is what actually gets it written consistently. A prompt or a checklist item during drafting closes this gap far more reliably than hoping people remember on their own.

DunSocial's composer includes an alt text field directly alongside the media upload for every platform that supports it, so writing a description is part of the same drafting step as everything else rather than a separate task easy to skip under deadline.

## What alt text doesn't replace

Alt text describes an image, it doesn't replace genuinely accessible design choices elsewhere, sufficient color contrast, captions on video, plain language in the caption itself. Treating alt text as the one accessibility box to check, while ignoring everything else, misses most of what actually makes content usable for a wider audience.

DunSocial helps with the alt text field, not the wider design choices, which stay with whoever creates the image or video. Checking those belongs in the same review step.

## A reasonable habit to build

Writing alt text for every image post, as a fixed step rather than a judgment call made fresh each time, removes the decision fatigue that leads to it getting skipped under pressure. Once it's a habit rather than a choice, it stops being the thing that gets cut when a post needs to go out quickly.

A DunSocial draft waiting on the calendar is the natural place to catch a missing description, since the reviewer can see the image & the field together before the post publishes.

## Related guides

- [What is social media brand safety?](https://www.dunsocial.com/hub/social-media-compliance-and-brand-safety/what-is-social-media-brand-safety.md)
- [What social media content formats actually work?](https://www.dunsocial.com/hub/social-media-content-creation/what-social-media-content-formats-actually-work.md)
- [How to write captions that get engagement](https://www.dunsocial.com/hub/social-media-content-creation/how-to-write-captions-that-get-engagement.md)
- [How to batch create social media content](https://www.dunsocial.com/hub/social-media-content-creation/how-to-batch-create-social-media-content.md)

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