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代替テキスト生成 for X Chrome Extension

Generates alt text for X (Twitter) images automatically using OpenAI's vision model.

Checked 3 Oct 2026 Reviewed by Alex Listed since October 2024

Screenshot of 代替テキスト生成 for X Chrome Extension

At a glance

Starts at Free No paid plan found on the Chrome Web Store, September 2026.
Free tier Yes
Platforms Chrome, API
Best for X users writing accessible image descriptions fast
Not for Anyone without their own OpenAI API key

3.9 out of 5

Scored by Alex after real use

Our verdict

This Chrome extension adds a button to X's image description screen that calls OpenAI's vision model to write and insert alt text for you, so you skip typing image descriptions by hand. It needs your own OpenAI API key configured first, and it doesn't work without one; the developer states it collects no data and runs no analytics tracking. People who post images on X and want accessible alt text without extra typing get a small, privacy-conscious tool, though anyone unwilling to set up an API key is stuck at the first step.

✓What it does well

Automatic alt textGenerates image alt text for X posts with one button press.
Vision-model accuracyUses OpenAI's vision model to describe what's actually in the image.
No trackingCollects no user data and runs no analytics tracking.

✕Where it falls short

Needs your own API keyIt requires you to obtain and configure your own OpenAI API key first.
No ratings yetIt has no user ratings so far to judge it by.
X onlyIt only works on X (formerly Twitter), not other social platforms.

Key features

One-click generationAdds a button that generates alt text directly on the image editor screen.
OpenAI Vision integrationSends the uploaded image to OpenAI's vision model for description.
Automatic text insertionInserts the generated description straight into the alt text field.
Configurable API keyLets you set your OpenAI API key through the extension's options.

Questions about 代替テキスト生成 for X Chrome Extension

What does 代替テキスト生成 for X Chrome Extension do?

This Chrome extension adds a button to the image description screen on X that writes alt text automatically. It sends the uploaded image to OpenAI's vision model, then inserts the generated description straight into the alt text field, so users skip typing image descriptions by hand.

Does 代替テキスト生成 for X Chrome Extension need an OpenAI API key?

Yes. The extension requires users to obtain and configure their own OpenAI API key through its options, and it does not work without one. Toolio marks it as not for anyone without their own OpenAI API key, since setup stops at that first step otherwise.

Is 代替テキスト生成 for X Chrome Extension free?

The extension is free, and Toolio found no paid plan on the Chrome Web Store in September 2026. Generating alt text does rely on a user-supplied OpenAI API key, which has to be configured before the tool works.

Does 代替テキスト生成 for X Chrome Extension collect user data?

No. The developer states the extension collects no user data and runs no analytics tracking, which the reviewer counts among its strengths. The verdict describes it as a small, privacy-conscious tool for people who post images on X and want accessible alt text.

What are the limits of 代替テキスト生成 for X Chrome Extension?

The extension only works on X, formerly Twitter, and not on other social platforms. It has no user ratings so far to judge it by, and it depends on the user's own OpenAI API key. Alex scored it 3.9 out of 5 after real use.

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