Gemini Alt Text Generator – Free

free runs every 24 hours: 5
steps: describe, generate, paste: 3
accounts required: 0

Gemini alt text generator

What this Gemini alt text generator does

It writes alt text from a short description you type, built to skip the generic filler Gemini tends to default to in an open chat, phrasing like "a photo related to the topic" that's technically about the subject without describing anything specific in the actual image.

It doesn't look at an uploaded image, this site doesn't process images at all, you describe it and the tool writes the alt text. It's a server tool: your description goes to our AI server, not your browser, because writing something this specific is a language model's job, not a script's. 5 free runs every 24 hours on a rolling window, nothing to sign up for and no account needed first.

Alt text

Alt text, in plain terms

Alt text is the written alternative to an image: a screen reader announces it in place of the picture. It's an accessibility feature first, not a caption for sighted readers, and it needs to be specific, not vague enough to fit any similar photo.

Function over appearance: "Company logo, links to homepage" beats "a blue geometric logo" every time.
Decorative images get empty alt: alt="" tells a screen reader to skip an image that adds nothing a listener needs.
Charts need their data: "A bar chart" tells a listener nothing. The actual values or trend are the content.

How it works

How to write alt text from a Gemini-style description in three steps

No "related to the topic" filler to rewrite by hand.

Step 1: Describe the image specifically: what it shows, and what job it's doing on the page.
Step 2: Hit Generate. Concise, specific alt text comes back from our AI server in a few seconds.
Step 3: Read it like a screen reader would announce it, confirm it names something specific, and paste it in.

What goes wrong

What generic alt text breaks

Alt text vague enough to fit almost any similar image doesn't do the job the attribute exists for, even though it technically fills the field.

"Related to" phrasing: Describes the subject area, not the actual image, telling a listener nothing they couldn't guess from the page around it.
Generic chart filler: "A chart showing data" instead of the actual numbers, which is the one thing that matters.
Alt text on decorative images: Forces a screen reader to announce something irrelevant on every page it shows up on.

The Gemini tells

Why Gemini's alt text answers need a second pass

Asked directly in chat, Gemini leans toward generic phrasing that technically applies to the image without actually describing it, a habit worth catching before it reaches a screen reader.

"Related to" openers: Vague enough to fit almost any image on the same general subject.
Short, clipped output: Occasionally alt text so brief it reads like it was already cut off, missing useful context.

Straight answer

Does Gemini-generated alt text actually meet accessibility requirements?

Not automatically. Alt text from a good, specific description can meet the real intent of accessibility guidelines. From a vague, generic one, it often doesn't, whatever generated it.

The generator is only as good as what you describe. A specific description produces alt text worth keeping. Read every result before you publish it.

In practice

Who uses the Gemini alt text generator

Mostly people who noticed every Gemini-drafted alt text read like "a photo related to X" and rewrote it by hand on every single page they published, without exception.

Content teams: Getting alt text specific enough to describe what a listener actually needs to know.
Ecommerce sites: Distinct, specific alt text across thousands of product photos instead of ones that blur together.
Developers: Filling in missing alt attributes flagged by an accessibility audit.

FAQ

Everything answered. Gemini alt text generator, frequently asked

How do I generate alt text from a Gemini-style description?

Describe the image above and hit Generate. You'll get concise, specific alt text, not generic "related to" filler.

Do I upload the image to this tool?

No. This site doesn't process images. You describe it, and the tool writes alt text from that description.

Is it free?

Yes: 5 free runs every 24 hours, no account needed and nothing at all to sign up for first.

Why does Gemini write such generic alt text?

It tends toward phrasing like "related to the topic", technically about the subject area without describing the actual image.

What is alt text actually for?

It's an accessibility feature. A screen reader announces it in place of the image, so it should describe function specifically.

What alt text should a decorative image have?

An empty alt attribute, alt="", so a screen reader skips it instead of announcing something a listener doesn't need.

How should alt text describe a chart?

Name the actual data or trend, not just the chart type.

Does good alt text help SEO?

It can help image search, but it isn't a broad ranking factor. Write it for the listener, not to stuff a keyword in.

Is my description sent anywhere?

It's sent to our AI server to generate the alt text, not used to train models.

Why does Gemini's alt text sometimes read too short?

It can clip toward brevity, occasionally leaving out context a slightly fuller phrase would give.

How long should alt text be?

Long enough to convey function, short enough that a screen reader isn't reading a paragraph for one image.

How's this different from the generic AI alt text generator?

Same tool, tuned around Gemini's specific habits rather than a generic model's.

What if the image is also a link?

Describe where it goes or what it does, not just what it looks like.

Can I run a batch of images through it?

One at a time, within your 5 runs per 24 hours.

Will it give the same alt text twice?

Not reliably, the output can vary somewhat from one run to the next, even on the same input.

Is there an API?

Not yet, just one image at a time per run, within the daily allowance.

Does it work for other languages?

Built mainly for English; other languages may work but aren't held to the same standard of quality.

What happens after all 5 runs?

You'll see when the next one opens up, automatically, 24 hours after the run that used it.

Does it work on mobile devices?

Yes, it works fully in any modern mobile browser, on a phone or a tablet alike.

Does this guarantee accessibility compliance?

No. It can produce genuinely useful alt text from a good description, but compliance depends on the actual final result, not on a tool having generated it.

Should I still read the alt text before publishing?

Yes, always. Read it as a screen reader would announce it out loud, and confirm it names something specific rather than a general category.

What's the difference between the alt text generator and the meta description generator?

This writes accessible text for an image. The meta description generator writes the summary line under a page's title, a different job entirely.