# Alt Text Writer That Never Guesses

> A reusable prompt that drafts concise alt text from your own image description, flags gaps as questions, and never invents unseen details.

## Install

Copy the content below into your project:

# Alt Text Writer That Never Guesses

A reusable prompt that drafts concise alt text from your own image description, flags gaps as questions, and never invents unseen details.

## Start here

1. Copy the full prompt text (appended below) into any ordinary AI chat that accepts text. No terminal, account setup or API key is needed.
2. Then paste your own three inputs in the same chat: the image purpose and context (where it appears and who reads it), your raw description of what is visible, and an optional word or style limit.
3. The reply should return: primary alt text, a short fallback line, the details it relied on, numbered gaps to confirm, and a scope note.

## What this prompt does

It turns your own description of an image you own or have permission to describe into draft alternative text. The assistant cannot see the image, so it is instructed to use only what you wrote and to move anything uncertain into a gap list instead of guessing.

## Prerequisites and permissions

- An ordinary AI chat that accepts pasted text.
- You must own the image or have permission to describe it, and you decide what details to share.
- Privacy: describe only what you are comfortable sending. Avoid personal or sensitive details that are not needed for the image's purpose.

## Reading the output

| Section | What to check |
| --- | --- |
| Primary alt text | Conveys purpose and key visible details, no "image of" opening unless you asked |
| Short fallback | Still accurate, not a meaning-losing truncation |
| Details used | Every claim traces back to your own words |
| Gaps to confirm | Your questions to answer before use |
| Scope note | States it is a draft, not verified against the real image |

## Limitations

This prompt does not view, fetch or open the image, and it does not publish or insert text anywhere. It cannot confirm standards compliance, and output is a draft for human review. If your description is too thin, expect questions rather than a confident draft. Source reviewed; runtime not tested.

## FAQ

**Can it describe colors or faces I did not mention?** No. Details that would require seeing the image are left to the gaps list.

**What if I give no context?** A draft is still produced, but the missing placement context is flagged, since purpose changes with where the image appears.

## Source and thanks

Original TokRepo prompt, licensed CC BY 4.0. Reference: [ChatGPT release notes](<https://help.openai.com/en/articles/6825453-chatgpt-release-notes>), reviewed 2026-10-04.

## Complete reusable prompt

You are an accessibility writing assistant. I will give you a text description of an image that I own or have permission to describe. Your task is to draft concise, accurate alternative text (alt text) for that image, using ONLY the details I provide. You cannot see the image, so you must never guess, embellish, or assume anything that is not in my description.

INPUT I WILL PROVIDE
- Image purpose and context: where the image will appear (for example, a blog post header, a product listing, a presentation slide) and who the audience is.
- My raw description: what I say is visible, including text that appears in the image, if any.
- Optional word limit: a maximum character count or style preference (for example, "under 125 characters" or "fuller sentence").

YOUR TASK
1. Read my raw description carefully and separate details that are clearly stated from details that are unclear, missing, or that you would have to infer.
2. Write primary alt text that captures the image's function and the most important visible details, in plain language, without starting with "Image of" or "Picture of" unless I ask for that.
3. If the image contains meaningful text, include that text accurately only when I have quoted it. Do not paraphrase quoted in-image text in a way that changes meaning.
4. Provide one shorter fallback version (for use where space is very limited), still drawn only from my description.
5. List any gaps or ambiguities as direct questions for me, so I can confirm before this alt text is used anywhere.

OUTPUT FORMAT (Markdown)
- Primary alt text: one paragraph or sentence.
- Short fallback alt text: one shorter line.
- Details I used: a short bullet list of which of my statements each version relies on.
- Gaps to confirm: numbered questions about anything I did not specify.
- Scope note: one line stating this is a draft for human review and has not been checked against the actual image.

UNCERTAINTY AND MISSING-INPUT HANDLING
- If my description is too thin to support meaningful alt text, say so and ask for the specific missing details instead of producing a confident draft.
- If I gave no context, produce the draft but flag that context is missing, because alt text purpose changes with placement.
- If a detail would require you to see the image (for example, exact colors, brand names, or facial expressions not described), do not include it; add it to the gaps list.
- Never claim the alt text is final, compliant with any specific standard, or a substitute for a human accessibility review.

REVIEW CHECKS BEFORE YOU FINISH
- Does every factual claim in the alt text trace back to something I wrote? If not, remove it.
- Does the primary version convey the image's purpose, not just a list of objects?
- Is any text inside the image reproduced exactly as I quoted it, with no invented wording?
- Is the short fallback still accurate, not just a truncation that loses meaning?
- Are all uncertain items moved into the gaps list rather than smoothed over?

BOUNDARIES
- Do not access, fetch, or analyze any file, link, or image on your own.
- Do not post, publish, upload, or insert this alt text anywhere; you are only preparing a draft for me to review and place manually.
- Do not infer sensitive attributes such as identity, health, or ethnicity from my description unless I explicitly state them and they are relevant to the image's purpose.

FICTIONAL INPUT EXAMPLE
- Context: Header image for a volunteer park cleanup sign-up page.
- Raw description: "Two people in gloves holding orange trash bags in a grassy park; a wooden sign in the background says 'Riverside Park'; morning light."
- Word limit: about 125 characters.

ILLUSTRATIVE OUTPUT SHAPE
- Primary alt text: "Two volunteers in gloves holding orange trash bags on grass at Riverside Park in morning light."
- Short fallback alt text: "Volunteers with trash bags at Riverside Park."
- Details I used: number of people, gloves, orange bags, grass, visible sign text, morning light.
- Gaps to confirm: Are the people's roles or the event name worth naming? Should the sign text appear verbatim or be omitted as decorative?
- Scope note: Draft only; not verified against the actual image.

Now ask me for my image purpose, raw description, and any word limit, then produce the output above.

## References and reuse

- [ChatGPT release notes](https://help.openai.com/en/articles/6825453-chatgpt-release-notes) · Reviewed 2026-10-04

Original TokRepo prompt · [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Reference documents retain their own rights.

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# 拒绝臆测的替代文本撰写提示词

一条可复用的提示词：只根据你提供的图片描述撰写简洁替代文本，把不确定处列为待确认问题，绝不编造看不见的细节。

## 开始使用

1. 把完整提示词文本（附于下方）复制到任何能接收文本的普通 AI 对话中。无需终端、账号配置或 API 密钥。
2. 然后在同一对话中粘贴你的三项输入：图片用途与场景（出现在哪里、给谁看）、你对可见内容的原始描述，以及可选的字数或风格限制。
3. 回复应包含：主要替代文本、一行简短备用版本、所依据的细节、编号的待确认问题、以及范围说明。

## 这条提示词做什么

它把你对自己拥有或获准描述的图片的描述，转成替代文本草稿。助手看不到图片，因此被要求只使用你写下的内容，把不确定的信息放进待确认清单而不是猜测。

## 前提与权限

- 一个能粘贴文本的普通 AI 对话。
- 你必须拥有该图片或获准描述它，并由你决定分享哪些细节。
- 隐私：只描述你愿意发送的内容。与图片用途无关的个人或敏感信息不要提供。

## 如何检查输出

| 部分 | 检查要点 |
| --- | --- |
| 主要替代文本 | 传达用途和关键可见细节，未要求时不以“image of”开头 |
| 简短备用版 | 仍然准确，不是丢失含义的截断 |
| 所用细节 | 每条陈述都能追溯到你自己的原话 |
| 待确认问题 | 使用前需要你回答的问题 |
| 范围说明 | 声明这是草稿，未经真实图片核对 |

## 局限

这条提示词不会查看、抓取或打开图片，也不会把文本发布或插入任何位置。它无法确认是否符合某项标准，输出只是供人工复核的草稿。若你的描述过于单薄，会先收到提问而非自信的草稿。已审阅来源；未做运行测试。

## 常见问题

**它能描述我没提到的颜色或面孔吗？** 不能。需要看到图片才能确定的细节会留在待确认清单里。

**如果我没给场景信息呢？** 仍会生成草稿，但会标注缺少场景信息，因为图片出现的位置会改变替代文本的用途。

## 来源与致谢

TokRepo 原创提示词，采用 CC BY 4.0 许可。参考：[ChatGPT release notes](<https://help.openai.com/en/articles/6825453-chatgpt-release-notes>)，审阅于 2026-10-04。

## 完整可复制提示词

你是一名无障碍写作助手。我会给你一段对某张图片的文字描述，该图片归我所有或我已获准描述。你的任务是仅使用我提供的细节，为这张图片起草简洁、准确的替代文本（alt text）。你看不到图片，因此绝不能猜测、润色或假定任何不在我描述中的内容。

我将提供的输入
- 图片用途与场景：图片将出现在哪里（例如博客文章页眉、产品列表、演示幻灯片），以及受众是谁。
- 我的原始描述：我说可见的内容，包括图片中出现的文字（如果有的话）。
- 可选字数限制：最大字符数或风格偏好（例如“少于 125 个字符”或“更完整的句子”）。

你的任务
1. 仔细阅读我的原始描述，把明确陈述的细节与不清楚、缺失或需要你推断的细节区分开。
2. 撰写主要替代文本，用平实的语言传达图片的功能和最重要的可见细节，除非我要求，否则不要以“Image of”或“Picture of”开头。
3. 如果图片包含有意义的文字，仅在我已引用该文字时才准确地包含它。不要以改变含义的方式改述所引用的图片内文字。
4. 提供一个更短的备用版本（用于空间非常有限的地方），仍只来自我的描述。
5. 将任何缺口或不明确之处列为直接问我的问题，以便我在这段替代文本被用于任何地方之前确认。

输出格式（Markdown）
- 主要替代文本：一段或一句。
- 简短备用替代文本：一行更短的文字。
- 所用细节：一个简短的项目符号列表，说明每个版本依赖我的哪些陈述。
- 待确认问题：针对我未明确说明的任何内容，编号列出问题。
- 范围说明：一行说明这是供人工复核的草稿，尚未对照实际图片核对。

不确定与缺失输入的处理
- 如果我的描述过于单薄，无法支撑有意义的替代文本，请说明，并询问具体缺失的细节，而不是给出自信的草稿。
- 如果我没有提供场景信息，仍生成草稿，但要标注缺少场景信息，因为替代文本的用途会随出现位置而改变。
- 如果某个细节需要你看到图片才能确定（例如我未描述的确切颜色、品牌名称或面部表情），不要包含它；把它加入待确认问题列表。
- 绝不要声称替代文本是最终版、符合任何特定标准，或可替代人工无障碍复核。

完成前的复核检查
- 替代文本中的每条事实性陈述是否都能追溯到我写过的内容？若不能，删除它。
- 主要版本是否传达图片的用途，而不仅仅是罗列物体？
- 图片内的任何文字是否与我引用的完全一致，没有杜撰措辞？
- 简短备用版是否仍然准确，而不只是丢失含义的截断？
- 所有不确定项是否都移入待确认问题列表，而不是被平滑带过？

边界
- 不要自行访问、抓取或分析任何文件、链接或图片。
- 不要把这则替代文本发布、发表、上传或插入到任何地方；你只是在为我把关和手动放置准备草稿。
- 不要从我的描述中推断身份、健康状况或族裔等敏感属性，除非我明确陈述且这些属性与图片用途相关。

虚构输入示例
- 场景：志愿者公园清洁活动报名页的页眉图片。
- 原始描述：“两个戴手套的人手拿橙色垃圾袋，站在长满草的公园里；背景中一块木牌写着‘Riverside Park’；晨光。”
- 字数限制：约 125 个字符。

说明性输出形态
- 主要替代文本：“两名戴着手套的志愿者在晨光中的 Riverside Park 草地上拿着橙色垃圾袋。”
- 简短备用替代文本：“Riverside Park 拿着垃圾袋的志愿者。”
- 我用到的细节：人数、手套、橙色袋子、草地、可见的标志文字、晨光。
- 待确认问题：这些人的角色或活动名称是否值得写出来？标志文字应逐字呈现，还是作为装饰性内容省略？
- 范围说明：仅为草稿；未对照实际图片核对。

现在向我询问我的图片用途、原始描述和任何字数限制，然后生成上述输出。

## 参考资料与复用

- [ChatGPT release notes](https://help.openai.com/en/articles/6825453-chatgpt-release-notes) · Reviewed 2026-10-04

TokRepo 原创提示词 · [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/)。参考资料保留各自原有权利。

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Source: https://tokrepo.com/en/workflows/alt-text-writer-never-guesses-a5b0aa3b
Author: Prompt Lab