WHY ENGLISH?
Write image alt text as a context-aware text equivalent—describing the information or function a reader needs without repeating nearby words or inventing visual facts
Writing image alt text means deciding why an image is present, what information or function it contributes, which visible details matter in context, whether important words appear inside it, and whether a short alternative is enough. English matters because “red circle”, “error”, “delete”, “sales rose” and “portrait of the author” perform different jobs.
W3C Web Accessibility Initiative guidance says images need text alternatives that convey their information or function. Its tutorial distinguishes informative, decorative, functional, text, complex and grouped images, and stresses that the correct text depends on purpose, context and content. Decorative images generally use a null alternative, while a functional image’s alternative describes the action rather than merely its appearance.
This guide follows a fictional school portal containing a campus photograph, a download icon, a poster with dates and a results chart. It does not claim one sentence can replace every complex visual, certify WCAG conformance, replace user testing or authorise publication of personal details. The implemented page, surrounding text, code and interaction must be checked together.
Article contents
Open all chapters
- 1. Read the Page Before Describing the Picture
- 2. Classify the Image by Purpose
- 3. Use a Null Alternative for Truly Decorative Images
- 4. Describe the Essential Information
- 5. Describe Function for Linked Images and Buttons
- 6. Include Important Words Shown Inside an Image
- 7. Give Complex Images a Short Name and a Full Equivalent
- 8. Coordinate Alt Text, Captions and Body Copy
- 9. Avoid Unverifiable Identity, Emotion and Intention
- 10. Keep the Text as Concise as the Purpose Allows
- 11. Test the Implemented Experience
- 12. Revise When the Image or Context Changes
ORIENTATION
What this guide covers
Current fact check
Checked on 9 November 2026, W3C WAI’s Images Tutorial said text alternatives should describe the information or function represented by an image and should be chosen according to purpose, context and content. It distinguished informative, decorative, functional, text, complex and grouped images. Its decision tree and WCAG technique H37 further support context-aware alternatives and inclusion of important words shown in an image. These are accessibility principles, not a fixed caption formula.
What this guide does not cover
This article owns drafting, implementing, reviewing and revising alt text for web images. It does not own captions, audio description, video transcripts, interface design, colour contrast, keyboard access, complete WCAG conformance, legal certification, image licensing, search ranking, translation workflow, computer-vision labelling or permission to identify people.
Worked example
Every chapter returns to a fictional school portal with a decorative campus banner, a PDF download icon, an event poster containing dates and a chart showing participation over four terms. It is fictional, low-stakes and educational; it does not report a real school, clinical decision or guaranteed outcome.
Did You Know? For image alt text, precise communication makes appraisal possible but does not perform the appraisal, remove bias or guarantee transfer.
Warm up with eduKate’s guides to explaining scientific evidence and asking better questions in class.
CHAPTER 1 OF 12
1. Read the Page Before Describing the Picture
Why this move matters
Inspect the heading, paragraph, caption, link target and task that surround the image.
Did You Know? Context decides which visual facts are useful.
Decide what the image does in this exact context
Inspect the heading, paragraph, caption, link target and task that surround the image. For The same campus photograph needs no extra description in a decorative banner but may need identification in a history article., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: Alt text cannot be judged from the image file alone.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. Alt text cannot be judged from the image file alone. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: Inspect the heading, paragraph, caption, link target and task that surround the image.
- Boundary: Alt text cannot be judged from the image file alone.
- Application: The same campus photograph needs no extra description in a decorative banner but may need identification in a history article. Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Read the Page Before Describing the Picture” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 2 OF 12
2. Classify the Image by Purpose
Why this move matters
Decide whether it is informative, functional, decorative, textual, complex or part of a meaningful group.
Did You Know? Purpose selects the strategy before wording begins.
Decide what the image does in this exact context
Decide whether it is informative, functional, decorative, textual, complex or part of a meaningful group. For The arrow icon inside a download link is functional; a flourish beside the heading is decorative., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: An image can change category when reused elsewhere.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. An image can change category when reused elsewhere. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: Decide whether it is informative, functional, decorative, textual, complex or part of a meaningful group.
- Boundary: An image can change category when reused elsewhere.
- Application: The arrow icon inside a download link is functional; a flourish beside the heading is decorative. Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Classify the Image by Purpose” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 3 OF 12
3. Use a Null Alternative for Truly Decorative Images
Why this move matters
When an image adds no information or function, implement an empty alt attribute according to the platform.
Did You Know? Silence can be the accurate equivalent for decoration.
Decide what the image does in this exact context
When an image adds no information or function, implement an empty alt attribute according to the platform. For The abstract colour wash behind the page title uses alt=""., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: Omitting the attribute is not the same as providing a null alternative.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. Omitting the attribute is not the same as providing a null alternative. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: When an image adds no information or function, implement an empty alt attribute according to the platform.
- Boundary: Omitting the attribute is not the same as providing a null alternative.
- Application: The abstract colour wash behind the page title uses alt="". Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Use a Null Alternative for Truly Decorative Images” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 4 OF 12
4. Describe the Essential Information
Why this move matters
State the fact, relationship or identification that the image contributes to the surrounding content.
Did You Know? Selection is part of accurate description.
Decide what the image does in this exact context
State the fact, relationship or identification that the image contributes to the surrounding content. For “Students testing water samples beside the canal” supports an article about fieldwork methods., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: Listing every colour and object may hide the educational point.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. Listing every colour and object may hide the educational point. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: State the fact, relationship or identification that the image contributes to the surrounding content.
- Boundary: Listing every colour and object may hide the educational point.
- Application: “Students testing water samples beside the canal” supports an article about fieldwork methods. Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Describe the Essential Information” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 5 OF 12
5. Describe Function for Linked Images and Buttons
Why this move matters
Name the action or destination rather than only the icon’s shape.
Did You Know? Functional language supports action.
Decide what the image does in this exact context
Name the action or destination rather than only the icon’s shape. For A downward arrow inside a PDF link becomes “Download the timetable PDF.”, first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: “Blue arrow” does not tell the user what activating it does.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. “Blue arrow” does not tell the user what activating it does. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: Name the action or destination rather than only the icon’s shape.
- Boundary: “Blue arrow” does not tell the user what activating it does.
- Application: A downward arrow inside a PDF link becomes “Download the timetable PDF.” Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Describe Function for Linked Images and Buttons” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 6 OF 12
6. Include Important Words Shown Inside an Image
Why this move matters
Transcribe or otherwise provide the words when they are necessary to understand the content.
Did You Know? Visible words remain content.
Decide what the image does in this exact context
Transcribe or otherwise provide the words when they are necessary to understand the content. For The event poster alternative includes “Open House, 14 November, 9 am–1 pm” because those details are not repeated nearby., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: Avoid images of text where ordinary text can serve the same purpose.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. Avoid images of text where ordinary text can serve the same purpose. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: Transcribe or otherwise provide the words when they are necessary to understand the content.
- Boundary: Avoid images of text where ordinary text can serve the same purpose.
- Application: The event poster alternative includes “Open House, 14 November, 9 am–1 pm” because those details are not repeated nearby. Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Include Important Words Shown Inside an Image” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 7 OF 12
7. Give Complex Images a Short Name and a Full Equivalent
Why this move matters
Use concise alt text to identify a chart and place the data or interpretation in nearby accessible text.
Did You Know? Complex meaning often needs more than one layer.
Decide what the image does in this exact context
Use concise alt text to identify a chart and place the data or interpretation in nearby accessible text. For The chart alt says participation rose across four terms; a table below gives each term’s value., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: A long data dump inside one attribute can be hard to navigate.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. A long data dump inside one attribute can be hard to navigate. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: Use concise alt text to identify a chart and place the data or interpretation in nearby accessible text.
- Boundary: A long data dump inside one attribute can be hard to navigate.
- Application: The chart alt says participation rose across four terms; a table below gives each term’s value. Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Give Complex Images a Short Name and a Full Equivalent” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 8 OF 12
8. Coordinate Alt Text, Captions and Body Copy
Why this move matters
Let each element do a distinct job and remove needless repetition.
Did You Know? Accessible writing is an information architecture.
Decide what the image does in this exact context
Let each element do a distinct job and remove needless repetition. For The caption credits the photographer, the paragraph explains the lesson and the alt text identifies the fieldwork activity., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: Repeating the same sentence three times increases noise.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. Repeating the same sentence three times increases noise. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: Let each element do a distinct job and remove needless repetition.
- Boundary: Repeating the same sentence three times increases noise.
- Application: The caption credits the photographer, the paragraph explains the lesson and the alt text identifies the fieldwork activity. Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Coordinate Alt Text, Captions and Body Copy” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 9 OF 12
9. Avoid Unverifiable Identity, Emotion and Intention
Why this move matters
Describe visible, relevant evidence without guessing protected traits, relationships or thoughts.
Did You Know? Accuracy includes knowing what cannot be seen.
Decide what the image does in this exact context
Describe visible, relevant evidence without guessing protected traits, relationships or thoughts. For “Two students compare notes” is safer than “best friends feel proud” when the image gives no such evidence., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: A filename or model output is not reliable proof of identity.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. A filename or model output is not reliable proof of identity. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: Describe visible, relevant evidence without guessing protected traits, relationships or thoughts.
- Boundary: A filename or model output is not reliable proof of identity.
- Application: “Two students compare notes” is safer than “best friends feel proud” when the image gives no such evidence. Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Avoid Unverifiable Identity, Emotion and Intention” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 10 OF 12
10. Keep the Text as Concise as the Purpose Allows
Why this move matters
Remove filler such as “image of” when the platform already announces an image, while retaining needed type words such as chart or map.
Did You Know? Useful concision reduces listening effort.
Decide what the image does in this exact context
Remove filler such as “image of” when the platform already announces an image, while retaining needed type words such as chart or map. For “Map of wheelchair-accessible entrances” is brief and task-focused., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: Brevity must not erase the essential distinction.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. Brevity must not erase the essential distinction. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: Remove filler such as “image of” when the platform already announces an image, while retaining needed type words such as chart or map.
- Boundary: Brevity must not erase the essential distinction.
- Application: “Map of wheelchair-accessible entrances” is brief and task-focused. Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Keep the Text as Concise as the Purpose Allows” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 11 OF 12
11. Test the Implemented Experience
Why this move matters
Inspect the actual attribute, keyboard and screen-reader flow, image-off view and link purpose where possible.
Did You Know? Testing connects writing to the user experience.
Decide what the image does in this exact context
Inspect the actual attribute, keyboard and screen-reader flow, image-off view and link purpose where possible. For A reviewer discovers that the CMS saved the description as a caption but left the alt attribute blank., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: A correct draft in a document does not prove correct implementation.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. A correct draft in a document does not prove correct implementation. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: Inspect the actual attribute, keyboard and screen-reader flow, image-off view and link purpose where possible.
- Boundary: A correct draft in a document does not prove correct implementation.
- Application: A reviewer discovers that the CMS saved the description as a caption but left the alt attribute blank. Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Test the Implemented Experience” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
CHAPTER 12 OF 12
12. Revise When the Image or Context Changes
Why this move matters
Review alt text after crops, chart updates, link changes, localisation or page redesign.
Did You Know? Accessibility content needs ownership and version awareness.
Decide what the image does in this exact context
Review alt text after crops, chart updates, link changes, localisation or page redesign. For When the poster date changes, the alternative and nearby event text are updated together., first decide whether the image is informative, functional, decorative, textual, complex or part of a group.
Write the useful equivalent, not a visual inventory
Express the information or function that a reader needs at this point. Preserve this limit: Stale alt text can be confidently wrong.
Handle charts, text and controls with the right strategy
Include essential visible words, name a control by its action and provide fuller nearby data or explanation when one short attribute cannot carry a complex image.
Test in the page and revise with evidence
Read the text with its heading, caption, link and surrounding copy; remove duplication and check the implemented attribute. Stale alt text can be confidently wrong. Alt text improves access, but it does not make an otherwise inaccessible page complete.
Practical reader check
- Evidence: Review alt text after crops, chart updates, link changes, localisation or page redesign.
- Boundary: Stale alt text can be confidently wrong.
- Application: When the poster date changes, the alternative and nearby event text are updated together. Name the next output and how it will be checked.
Student, parent and career transfer
Practise “Revise When the Image or Context Changes” by separating evidence, interpretation, decision and next action. A parent, teacher or teammate can ask what supports the sentence and which missing fact could change it. This discipline transfers to school websites, learning platforms, digital publishing, communications, e-commerce, software interfaces, reports, public services, marketing and content design without guaranteeing grades, accessibility conformance, software fixes, interoperability, adoption, approval, employment or future success.
PRACTICE LAB
Build a image alt text decision trail
Student route
- Choose one real example or official document inside this guide’s scope.
- Copy its objective and underline actor, action, context, evidence and intended decision.
- Draw the specific reasoning chain used in this article.
- Mark each step reported, inferred, contested or unknown.
- Rewrite the conclusion so it preserves the narrowest important limitation.
Parent or teacher route
Ask the learner to explain write image alt text as a context-aware text equivalent—describing the information or function a reader needs without repeating nearby words or inventing visual facts twice: once to a classmate and once to a method specialist. Praise a precise correction and a well-stated unknown; both show disciplined attention to evidence.
Early-career route
Create a one-page image alt text audit with source link, date checked, scope, method logic, decisive wording, contrary evidence, limit and next action. A colleague should be able to continue without guessing.
Decision rule
If a shorter explanation removes the condition that made the original claim true, it is not clearer yet. Restore the condition.
Continue with eduKate’s guides to reading course and career information and giving useful feedback in group projects.
USEFUL NEXT READING
Connect this narrow owner to its neighbour
Read the multilingual alt-text translation guide for a related but different reader job. Return here when the question is specifically how to write image alt text as a context-aware text equivalent—describing the information or function a reader needs without repeating nearby words or inventing visual facts. Use each guide for the reader task named in its heading.
For English practice across research, school and career communication, visit the Singapore English Tuition Centre learning site.
FREQUENTLY ASKED QUESTIONS
Questions students and parents often ask
Should every image have a description?
Every image needs an appropriate text-alternative decision, but a truly decorative image usually uses a null alternative rather than descriptive wording.
How long should alt text be?
Use the shortest wording that conveys the image’s purpose in context. Complex images often need nearby full text or data.
Should I start with “image of”?
Usually the platform already identifies an image, but terms such as chart, map or diagram may help users understand the content type.
What about text inside an image?
If the words are important and not available nearby, include them in an appropriate text alternative; ordinary text is often preferable.
Can AI generate the final alt text?
It may help draft, but a human must verify visible facts, page purpose, privacy and implementation.
Does good alt text make the whole page accessible?
No. It is one part of accessibility alongside structure, interaction, contrast, keyboard support, media alternatives and testing.
PRIMARY SOURCES
Read the primary guidance for this image alt text
Facts were checked against current official and primary sources on 9 November 2026. Follow the live source for later corrections, completed updates or companion material.
- W3C WAI Images Tutorial
- W3C WAI alt Decision Tree
- W3C WCAG technique H37
- eduKate alt-text translation guide
- eduKate English Learning Hub
A cheerful final note
Precise English makes write image alt text as a context-aware text equivalent—describing the information or function a reader needs without repeating nearby words or inventing visual facts more generous, not less. People can see how their evidence and values entered the work, where disagreement remains and what a responsible next step looks like.