Image Alt Text Workflow for Every Blog Post You Publish
Meta description: Image alt text workflow for every blog post you publish — a repeatable per-image workflow: what to write, what to skip for decorative images, file names, and a pre-publish checklist.
Direct answer
An image alt text workflow for every blog post you publish means handling each image the same way: decide whether it carries meaning, write one plain sentence describing what a reader needs to know from it, give the file a descriptive name before uploading, and run a whole-post check before publishing so no image is left undescribed or misdescribed.
TL;DR — Key takeaways
- Alt text is the text alternative for an image. It is read by screen readers and shown when an image cannot load.
- Not every image needs descriptive alt text. Decorative images should be marked as decorative so screen readers can skip them.
- The workflow is per image, not per post: purpose, description, file name, then a final whole-post check.
- Good alt text describes what matters in the image for that post, not everything visible in it.
- File names, captions, and surrounding text are companions to alt text, not substitutes for it.
What alt text is, and why a workflow beats good intentions
Alt text is the alternative text provided for an image in a page's code. When an image cannot be seen — because the reader uses a screen reader, because the image failed to load, or because the connection is slow — the alt text stands in for the image. Google's documentation on images notes that alt text helps search engines understand images, and that descriptive alt text also improves accessibility for people who cannot see the image.
That dual role is why a workflow matters more than a single good example. The usual failure is procedural: an image added late gets blank alt text, a decorative banner gets a long description nobody needs, or a chart's key finding never makes it into words.
This guide assumes you already know the basics of image optimisation. If you want the broader picture first, read Image SEO for Blog Posts: Alt Text and File Names. That post covers the principles. This post gives you the repeatable process to apply them to every post, without relying on memory.
Definition: the three kinds of images in a blog post
A workflow starts with sorting, because the right treatment depends on the image's job. Most blog images fall into three kinds.
Informative images carry meaning the reader needs. A photograph that shows a step in a process, a screenshot that shows where to click, or a chart that shows a trend are all informative. If the image were removed, the reader would lose information. These images need descriptive alt text.
Decorative images exist for visual rhythm or mood and carry no information the reader needs. A generic divider, a background texture, or a stock photograph that merely illustrates "blogging" in a general way, when the text already says everything, may be decorative. If the image were removed, the reader would lose nothing important. These images should not get a long description. In most publishing systems, they should get empty alt text so assistive technology skips them, or be marked decorative through the system's own control.
Functional images act as links or buttons. An image that is also a link, such as a banner that leads to a guide, is functional. Its alt text should describe the link's destination or action, not just the picture. For example, the alt text for a linked logo might name the destination page, because that is what activating the image does.
Sorting first prevents the two most common errors: describing decorative images at length, which wastes a screen reader user's time, and leaving informative images undescribed, which hides information. When you are unsure which kind an image is, ask a simple test: if I removed this image, would a reader miss a fact, a step, or a finding? If yes, it is informative. If no, it is decorative.
Step 1: Decide the purpose before you write a word
For each image, before writing alt text, write down — even mentally — its purpose in this post. What is the reader supposed to learn from it? Which sentence in the surrounding text does it support? What would be lost without it?
This step is short, but it changes the alt text that follows. A photograph of a desk could be described in dozens of ways: the laptop, the notebook, the coffee, the light. The purpose decides which detail matters. If the post is about setting up a writing routine, the relevant detail might be the notebook and the closed laptop lid signalling a distraction-free setup. If the post is about lighting for video calls, the relevant detail is the window light. Alt text that tries to describe everything describes nothing well, because the reader cannot tell which detail was the point.
Purpose also helps with charts and diagrams, where the temptation is to list every data point. The purpose of a chart in a blog post is usually one finding: a trend rises, a gap widens, one option outperforms another. Alt text should state that finding, and the surrounding text or a data table should carry the full numbers. Trying to put a whole dataset into alt text makes it unreadable, and it duplicates what the text should do better.
Step 2: Write one plain sentence for informative images
Good alt text for an informative image is usually one plain sentence, sometimes two short ones. It names the subject and the relevant action or finding, in the order a sighted reader would notice them. It avoids phrases like "image of" or "picture of," because the screen reader already announces that an image is present. Starting with "Image of a chart showing..." wastes the first words on information the reader already has.
Worked examples:
- Weak: "Image of a desk with a laptop and notebook and coffee."
- Strong: "A notebook open beside a closed laptop, set up for a distraction-free writing session."
- Weak: "Chart."
- Strong: "A line chart showing blog traffic rising steadily over twelve weeks after weekly publishing began."
- Weak: "Screenshot of settings."
- Strong: "The publishing settings panel, with the featured image option highlighted in the sidebar."
Notice what the strong versions do. They choose the detail that matters for the post, they state it plainly, and they stop. They do not stuff keywords, they do not repeat the caption word for word, and they do not describe colours or layout unless colour or layout is the point.
Keyword stuffing in alt text is a particular temptation for bloggers, and it should be avoided. Alt text written as a string of search terms reads badly to a screen reader user and does not serve the image's purpose. One natural mention of the topic, when it genuinely describes the image, is enough. The post's headings and body text carry the topic; alt text carries the image.
Step 3: Handle decorative images correctly — by skipping the description
Decorative images need a decision, not a description. The decision is to mark them so assistive technology skips them. In most content systems, that means leaving the alt text field empty, or using the system's "decorative" option if it provides one. An empty alt attribute is not the same as a missing alt attribute. A missing attribute may cause a screen reader to read the file name aloud, which is worse than silence. An empty attribute is an explicit signal: this image carries no information, move on.
Writers often resist this step because it feels like leaving work undone. It is not. Describing a decorative divider at length forces a screen reader user to listen to information they do not need, on every page, for no benefit. Skipping decorative images is a courtesy, and it is part of accessibility, not a shortcut around it.
Step 4: Name the file before you upload it
File names are the part of the workflow most often skipped, because the image is usually downloaded with a camera or stock-site name and uploaded as-is. A descriptive file name helps in three quiet ways: it helps you find the image later, it gives search engines another plain-language signal about the image, and it prevents a screen reader from announcing a meaningless string if the alt attribute is ever missing.
A good file name is short, lowercase, hyphenated, and descriptive: content-calendar-example-small-business.jpg rather than IMG_4821.jpg or final-version-2-NEW.jpg. It should describe the image, not the post's keyword strategy. It does not need to repeat the alt text exactly, and it should not be stuffed with keywords either. One clear phrase is enough.
The timing matters: rename before uploading, not after. Once an image is uploaded and embedded, renaming usually means re-uploading and re-linking, which is work nobody does. Make renaming part of the step where the image is chosen, alongside writing the alt text. The two tasks belong together, because both require deciding what the image shows and why it is in the post.
Step 5: Use captions and surrounding text as companions, not substitutes
Captions, surrounding paragraphs, and alt text each do a different job. The caption is visible to all readers and can add context, credit, or a comment. The surrounding text explains the image's place in the argument. The alt text stands in for the image itself when it cannot be seen.
Because they do different jobs, they should not simply repeat each other. If the caption already states the chart's finding, the alt text can still state it briefly, because a screen reader user may encounter the image before or without the caption, but the two should not be long identical blocks. More importantly, a good caption does not excuse missing alt text. A reader who cannot see the image still needs the alt text, even when a caption is present for sighted readers.
Text baked into a chart or infographic is not readable as alt text. If a chart's labels carry the finding, that finding still needs to appear in alt text or surrounding text, and a short data table below a heavily visual post helps readers who skim as well as screen reader users.
Comparison table: what to do with each kind of image
| Image kind | Reader loses what if removed? | Alt text approach | File name approach | Common error |
|---|---|---|---|---|
| Informative | A fact, step, or finding | One plain sentence stating what matters | Short, descriptive, hyphenated | Leaving it blank, or writing "image" only |
| Decorative | Nothing important | Mark as decorative, empty alt text | A simple descriptive name is still tidy, but not critical | Writing a long description nobody needs |
| Functional (linked) | A link or action | Describe the destination or action | Descriptive, as for informative images | Describing only the picture, not what clicking does |
| Chart or diagram | A trend or comparison | State the main finding; full data in text or table | Descriptive name naming the chart's topic | Listing every data point in alt text |
The pre-publish checklist for a whole post
Per-image work is necessary, but a whole-post check catches the errors that per-image work misses: the image added at the last minute, the duplicate, the caption that contradicts the alt text. Run this checklist after the post is fully drafted, not while images are still being swapped.
- List every image in the post. Scroll through the published preview and count them. Compare the count with your draft notes. A late-added image is the most common source of missing alt text.
- For each image, confirm its kind. Informative, decorative, or functional? If you cannot answer quickly, the image's purpose in the post is unclear, and the post may need a caption or a surrounding sentence to clarify it.
- Read every alt text aloud. If it sounds like a list of keywords, rewrite it as a sentence. If it starts with "image of," delete those words. If it is longer than two sentences, check whether the extra detail belongs in the caption or body text instead.
- Check decorative images are marked decorative. Confirm empty alt text or the system's decorative setting, not a placeholder description.
- Check file names. No camera strings, no "final-final" names, no keyword strings. Rename and re-upload any offender before publishing, not after.
- Check captions against alt text. They should complement each other, not duplicate each other word for word, and they should not contradict each other.
- Check images that are links. Confirm the alt text describes the destination or action, not just the picture.
- Check the post without images. Use a text-only preview, a reader view, or simply cover the images and read the text. Does the post still make sense? Does any sentence refer to "the image above" without stating what it shows? Fix those references so the post stands alone in text.
This checklist takes a few minutes for a typical post. The SEO Blog Writing Checklist for Beginners covers the wider pre-publish routine, and this image checklist fits naturally inside it.
Common mistakes, and how the workflow prevents them
The first mistake is leaving alt text blank for informative images because the field was easy to skip. The workflow prevents this by making the per-image step explicit and the whole-post count a checklist item. Blank alt text should be a deliberate choice for decorative images only.
The second mistake is writing alt text for the search engine instead of the reader. Keyword-stuffed alt text, repeated captions, and generic phrases like "best blogging tips image" all fail the read-aloud test. If alt text sounds unnatural when read aloud, it will sound unnatural to a screen reader user too. Rewrite it as a sentence you would say to someone describing the image over the phone.
The third mistake is describing everything visible instead of what matters. A photograph always contains more detail than the post needs. The purpose step exists to filter that detail. Without it, alt text becomes a inventory of objects, and the reader cannot tell which object was the point.
The fourth mistake is forgetting file names. A post can have perfect alt text and still carry camera file names that appear in image search results, in media libraries, and in screen reader fallbacks. Renaming before upload is a small step that prevents a messy media library later, and it supports on-page SEO in a modest, honest way.
The fifth mistake is treating alt text as a one-time task. When a post is refreshed and images are swapped, refresh the alt text too — a new image with an old description actively misdescribes. Add alt text to your content refresh checklist.
How this looks on Rankenza
The manual way to handle alt text is to write the post, add images at the end, and fill in alt text from memory under deadline pressure. That is when decorative images get long descriptions, informative images get blanks, and file names stay as camera strings.
Rankenza's way builds image handling into the article process rather than leaving it as an afterthought. Each article is researched from the top search results for its topic, and an intent filter step checks what the reader is trying to do, so images and their descriptions serve that job. A human review then checks the article as a whole — including whether descriptions, headings, and internal links drawn from the customer's own sitemap make sense together — before the article is delivered. The writer's image notes can follow the workflow above: purpose, one plain sentence, descriptive file name, and a whole-post check.
Pricing is the same as for other Rankenza articles: the first article is free, a single article costs $3.60, and a bundle of 50 articles costs $89. For drafting your own posts, the Metadata Generator can help you prepare title and description pairs alongside your image work, so the text around an image and the text describing it are written to the same standard.
Yes, for informative images. The caption is visible to sighted readers; alt text is what stands in for the image when it cannot be seen. They serve different readers in different situations, even when they overlap in content. Keep both, and keep them complementary rather than identical.
State the main finding in one or two sentences, and put the full data in the surrounding text or in a table near the chart. Alt text is not a place for a dataset. A reader who needs the numbers should find them in readable text, not in a long alt attribute.
No. Empty alt text is a deliberate signal that an image is decorative and should be skipped. Missing alt text is an omission, and it may cause a screen reader to read the file name instead. The difference matters, which is why the workflow asks you to decide the image's kind first.
Alt text should describe the image naturally. If the topic word genuinely describes the image, include it once, in a natural sentence. Do not add keyword variants, lists of terms, or phrases that do not describe what is shown. Good alt text helps search engines understand an image precisely because it describes it honestly.
Sources
- Google Search Central, "Image SEO best practices": https://developers.google.com/search/docs/appearance/google-images
- Google Search Central, "SEO starter guide": https://developers.google.com/search/docs/fundamentals/seo-starter-guide
- Web Accessibility Initiative, "Images concepts" (alt text decision guidance): https://www.w3.org/WAI/tutorials/images/