Chrome Extension

AI alt text generator for Chrome

Right-click any image on any website and get accurate, AI-written alt text in seconds. Copy it straight into your CMS, store, or post.

Add to Chrome See how it works →

25 credits for free • No credit card required

THE PROBLEM

Three reasons a blank alt field keeps costing you

SEO and AEO: Without SEO-friendly alt text, search engines can't read your images, so they stay out of Google Image Search no matter how strong the rest of your SEO is. AI answer engines like ChatGPT and Perplexity rely on alt text too. No description means your images are invisible to them.

Accessibility: For people using screen readers, an image with no alt text is just a blank. Alt text is how you make your content usable for everyone, and it's what WCAG 2.1 AA, the ADA, and the EAA require.

The workflow gap: You're not always inside a CMS with a plugin. You're writing a post, working in a platform with no integration, or fixing an image on a page you don't own. Writing good alt text by hand mid-task breaks your flow, so it gets rushed or skipped.

PROCESS

How to generate alt text in Chrome

Three steps from install to your first description.

Step 1 of 3

Add the extension to Chrome

Install AltTextLab from the Chrome Web Store and pin it to your toolbar.

Supports JPG, PNG, SVG, AVIF, and WebP image formats

Works in Chrome and Chromium browsers

Add to Chrome

AltTextLab Chrome extension settings panel showing API key field, language, writing style, and auto-copy options

Step 2 of 3

Paste your API key

Open the extension settings and paste the API key from your AltTextLab account. This links the extension to your credits.

Step 3 of 3

Right-click any image to generate alt text

Right-click any image on a public page and choose AltTextLab: Get alt text. The description appears in a popup within seconds. Paste it wherever you need it.

One-click copy, optional auto-copy to clipboard

Chrome browser with AltTextLab's right-click context menu open on a page image, showing the 'Get alt text' option

WHAT MAKES IT DIFFERENT

Faster than writing it yourself, smarter than generic AI

Generic tools see pixels. AltTextLab reads the page around the image and writes alt text a human would actually use.

Works on any website

Any page, any CMS, any platform. If you can open it in Chrome, you can generate alt text on it.

Context-aware descriptions

The extension reads the page's keywords, not just the image, so descriptions fit the page instead of guessing in isolation.

130+ languages

Generate accessible, localized image alt text in any of 130+ languages, ideal for multilingual content and global teams.

Privacy-first and GDPR-aligned

Images are processed and immediately discarded. Fully GDPR-aligned and compliant.

WCAG 2.1 AA compliant output

Every description meets screen reader standards: useful length, natural language, meaningful context. Aligned with the ADA, EAA, and Section 508.

Four writing styles

Choose descriptive, neutral, matter-of-fact, or minimal to match the tone of the page you're working on.

Start free with 25 credits

Testimonials

Teams that stopped writing alt text by hand

Rated 4.8 / 5 on G2

Close-up portrait of a woman with wavy auburn hair and green eyes

Julia R. · Marketing Manager

Software Development Company · Verified on G2

It actually understands what's in images and creates spot-on descriptions. No more guessing what to write. The Chrome extension is super handy and fits right into my workflow. It's been a huge time-saver for my blog and product pages.

Smiling woman with dark hair and glasses, black-and-white portrait photo

Lynn Zawie · Director, Web Services

Stony Brook University · Verified on Trustpilot

I tried a few others plugins before I found this one. The others were either too complicated or too expensive. This plugin was simple to use and install and worked immediately. The alt tags it generates are perfect. Very descriptive and accurate.

Caleb Stewart · Project Manager

Good Work · Verified on G2

The software is easy to use, and the generated alt text is accurate! Additionally, the support team is very responsive and helpful. It was also easy to set up within our content management system.

Daria M. · Project Manager

Web Design Agency · Verified on WordPress

I was able to generate alt text for thousands of images in just a few minutes, which saved me a lot of time compared to writing everything manually. AI descriptions are surprisingly accurate and understand the context of the image well. Setup was simple.

Ana Koroliova · Head of Customer Service

Zorka.Agency · Verified on WordPress

This plugin is absolutely worth installing. It runs fast, works seamlessly, and does exactly what it promises.

Gleb V. · Web Developer

Web Development Agency · Verified on WordPress

I manage several client sites and this plugin saves me a lot of time. I install it, set it up once, and it works in the background. It’s part of my standard setup now.

FAQ

Your questions, answered.

Can't find what you need? Contact us →

Does the Chrome Extension automatically apply alt text to my images, or do I have to paste it manually?

No. The Chrome extension generates alt text and copies it for you to paste wherever you need it. If you want alt text written into your site automatically and in bulk, the Web Snippet or a platform-specific plugin is the better fit. The extension is best for quick, one-off descriptions and for pages where you don't have a native integration.

Is this Chrome browser extension free?

Yes. Every AltTextLab account includes 25 image credits every month on the free plan, with no credit card required. The extension uses those credits, so you can start generating alt text right after you install it and add your API key.

Does the AltTextLab extension work on any website?

Yes. It works on any public web page, in any CMS or platform, as long as the image is publicly accessible. Password-protected or login-gated images can't be processed.

What permissions does the extension require and why?

The extension requests access to read the images on the pages you visit in order to analyze them and generate alternative text. It does not record your browsing history, read your keystrokes, access your personal data, or transmit anything beyond the specific image you right-click and request generation for. Image data is sent to AltTextLab's servers for analysis and is not stored or used to train AI models.

‍

Stop skipping alt text while you work

Add the extension and generate accurate alt text on any page in seconds.

Context-aware product descriptions

Works on any website

Start free with 25 credits