How to Write Alt Text and Filenames for LinkedIn Carousel Blog Images

Learn how to write useful alt text, filenames, and captions for LinkedIn carousel blog images so articles are clearer, more accessible, and SEO-friendly.

Images in SlideDrift blog articles should help readers understand the article and help search engines understand the page. That means every generated image needs a useful filename, contextual alt text, and placement near the section it supports.

The short version: write filenames that describe the image topic in a few hyphenated words, and write alt text that explains the image's purpose in context. Do not stuff keywords. Do not use vague filenames like image-1.webp. Do not describe decorative images as if they contain important information.

Google's image SEO guidance recommends descriptive filenames, titles, and alt text, and says images should be placed near relevant text when possible. LinkedIn also supports alternative text for shared images so screen reader users can understand the image.

The difference between filename, alt text, and caption

Element	Purpose	Example
Filename	Helps organize and describe the image file	`linkedin-carousel-workflow-diagram.webp`
Alt text	Text alternative for accessibility and context	“Workflow showing notes becoming a LinkedIn carousel draft”
Caption	Visible explanation for readers	“A simple workflow for turning notes into a carousel.”

Each one should be useful, but they should not all be identical.

Good and bad examples

Weak	Better	Why
`image1.png`	`blog-post-to-carousel-workflow.webp`	Describes the actual image
“LinkedIn carousel LinkedIn carousel SEO carousel”	“Diagram showing a blog post becoming a LinkedIn carousel”	Descriptive without stuffing
“Picture of design”	“Three carousel slide mockups showing a hook, lesson, and checklist”	Tells the reader what matters
“AI generated image”	“Illustration of a creator reviewing an AI-generated carousel draft”	Explains purpose, not production method

Example slide mockups for alt text for LinkedIn carousel blog images.

How to write alt text for blog hero images

A hero image usually sets context. It rarely needs a long description.

Formula: article topic + meaningful visual action.

Examples:

“LinkedIn carousel deck shown beside a content planning checklist.”
“Workflow illustration showing a URL being turned into carousel slides.”
“Mockup of branded carousel slides for a consultant's LinkedIn post.”

Avoid starting every alt text with “image of.” Screen readers already announce the image.

Workflow visual showing how to turn source material into a carousel for alt text for LinkedIn carousel blog images.

How to write alt text for diagrams

Diagrams need the meaning, not every visual detail. W3C's image guidance says text alternatives should depend on the image purpose, and complex images may need the information elsewhere on the page rather than squeezed into one alt attribute.

For a simple diagram:

Workflow showing source notes, extracted key points, carousel outline, and final PDF export.

For a complex chart, summarize the key takeaway in the alt text and explain the full data in nearby body copy.

Image checklist before publishing

The image is relevant to the nearby section.
The filename describes the image topic.
The alt text explains the image's purpose.
The caption adds context instead of repeating the alt text.
The image is compressed and served in a modern format such as WebP where possible.
The image does not contain fake UI text or unreadable paragraphs.
The image does not rely on text inside the image to communicate the main point.

How this fits SlideDrift articles

For every SlideDrift article, include at least one hero image and one useful in-article visual. The article package should include the image prompt, alt text, filename, and caption before the image is generated. That keeps the image process tied to the article's search intent instead of treating visuals as decoration.

Use the image prompt blocks in each SlideDrift article package to generate visuals, then publish them with descriptive filenames, useful alt text, and captions that support the surrounding section.