Write perfect alt text in seconds, not hours. Bulk-process 10,000+ images with AI trained on what actually ranks in Google Images. No more IMG_4921.jpg.
⭐⭐⭐⭐⭐ 4.8/5•10,000+ WordPress sites•17.5M+ images processed
The fastest image alt text generator for WordPress. Install our plugin, connect your media library, and use our free alt text generator (an AI alt text generator trained on real image-to-text pairs) to produce SEO-optimized alt text for every image in minutes. No coding, no per-image copywriting.
IMG_*.jpg orphans automatically.After processing 17.5 million images, we know what Google’s vision model rewards. Our generator is tuned for search ranking, not just accessibility compliance (though we hit both).
a shoe
Too vague, no keyword, generic. Ranks for nothing.
Men’s blue Nike Pegasus 40 running shoe, side view on white background
Specific, brand+model, keyword-aligned. Ranks for 12+ long-tail queries.
You could paste each image into ChatGPT. It would work — for 5 images. The three reasons teams choose our generator over a general AI chatbot:
ChatGPT writes descriptive text. Ours writes text tuned for what ranks. 34% more Google Images impressions in our A/B tests.
Process 10,000 images in an afternoon. ChatGPT requires 10,000 manual uploads. We integrate directly with your WordPress media library.
Generated alt text is written directly to the WordPress database and rendered on your site HTML. No copy-paste, no export/import.
Actual lift we measured on customer sites that switched from manual alt text to our generator.
An alt text generator is a tool — software or AI — that reads an image file and automatically writes the alt attribute for that image’s HTML tag. Alt text (short for “alternative text”) is the text that appears in place of an image when it cannot be displayed, is read aloud by screen readers for visually impaired users, and is the primary signal Google uses to understand what an image depicts.
A good alt text generator does three things simultaneously: it describes the image accurately (for accessibility), includes relevant keywords (for SEO), and produces copy that sounds natural rather than stuffed. That combination is harder than it sounds, which is why generic AI chatbots often fall short compared to purpose-built generators trained on search ranking data.
Before choosing any tool, it helps to understand the four approaches to generating alt text and where each one breaks down.
| Method | How it works | Best for | Breaks down when |
|---|---|---|---|
| Manual writing | You look at each image and write the alt text yourself | Sites with <50 images; hero images where nuance matters | You have 500+ images; consistency falls apart; takes hours |
| General AI (ChatGPT, Claude) | Paste image URL or upload; ask for description | One-off images; when you want full creative control | Bulk processing; no WordPress integration; not tuned for SEO |
| SEO plugin (Yoast, RankMath) | Plugin prompts you to add alt text; no auto-generation | Audit and reminder workflow; already using the plugin | Still requires manual writing; no actual generation |
| Dedicated AI generator | AI reads your images in bulk, generates SEO-optimised alt text using your page keywords as context | Any WordPress site with 50+ images; WooCommerce stores; multilingual sites | Very niche or technical images that need specific domain knowledge |
The key differentiator of a dedicated AI alt text generator: it uses page context alongside the image. It knows what keyword the post is targeting, what the product title is, what the page is about — and it writes alt text that reinforces that context. General AI tools don’t have access to your CMS context, so they write generic descriptions.
Whether you generate alt text automatically or write it manually, the same quality rules apply. These are the criteria a good alt text generator is optimised for:
alt="". Don’t write alt text for images that add no informational value.| Image type | Bad alt text | Good alt text |
|---|---|---|
| Product photo | alt="product" |
alt="Bosch GSR 12V-35 cordless drill with battery attached, side view" |
| Blog screenshot | alt="screenshot" |
alt="WordPress media library showing alt text field highlighted in red for missing images" |
| Data chart | alt="chart" |
alt="Bar chart comparing image SEO traffic before and after adding alt text: 340% increase over 90 days" |
| Team headshot | alt="photo" |
alt="Sarah Chen, Head of Product at ImageSEO, smiling in office setting" |
| Decorative divider | alt="decorative line" |
alt="" (empty — correct for decorative images) |
The Web Content Accessibility Guidelines (WCAG 2.1 AA) require that all non-decorative images have text alternatives. WCAG 2.1 Success Criterion 1.1.1 states: “All non-text content that is presented to the user has a text alternative that serves the equivalent purpose.”
In practice, this means every product image, infographic, chart, photo, and icon needs descriptive alt text. For sites with hundreds or thousands of images — WooCommerce stores, image-heavy blogs, portfolio sites — manual compliance is practically impossible without a generator.
The good news: good SEO alt text and good accessibility alt text are almost identical. Both need to be accurate, specific, and descriptive. The only difference is that accessibility doesn’t require keyword inclusion — but since describing an image specifically naturally includes relevant terms, the two goals align nearly 100% of the time.
ADA compliance in the US and accessibility legislation in the UK, EU, and Australia increasingly hold websites accountable for missing or inadequate alt text. Running a bulk alt text generator is both an SEO improvement and a legal risk reduction.
Before running a generator, you need to know how many images on your site are missing alt text. Three ways to find out:
In WordPress admin, go to Media → Library. Switch to list view. The “Alt Text” column shows which images have alt text and which are blank. This works for auditing small libraries; for large sites it’s impractical.
Go to Search Console → Performance → Search type: Image. Pages with zero impressions are likely missing alt text on key images. Sorted by impressions, you can see which pages are getting image search traffic vs. which are invisible — the gap often maps directly to missing alt text.
Our free alt tag checker scans your site URL and returns a complete report of images missing alt text, alt text that’s too short, and alt text that looks like a file name (e.g. IMG_4921). Run it before and after using the generator to measure improvement.
AI-generated alt text is a starting point, not a finished product. Before approving in bulk, spot-check for these common issues:
WooCommerce stores have a specific alt text problem: product images are rarely given alt text during catalog upload, and stores with hundreds of SKUs face an impossible backlog. A product image on a page about “Merino wool socks, men’s, grey” should have alt text that includes brand, product name, variant — not just “sock.”
Our alt text generator uses WooCommerce product metadata — title, category, attributes, short description — as context when writing alt text for product images. This produces alt text like:
| Product | Generic AI output | WooCommerce-aware output |
|---|---|---|
| Running shoe | A blue and white sneaker | Men’s Nike Air Zoom Pegasus 40 running shoe in blue/white, size US 10 |
| Coffee maker | A black kitchen appliance | De’Longhi Magnifica Evo ECAM290.81 automatic espresso machine, black, side view |
| Wool socks | Grey socks on white background | Falke TK2 Explore merino wool hiking socks in grey, men’s size 42-43 |
For a complete WooCommerce image SEO workflow beyond alt text, see our WooCommerce image SEO guide.
The obvious question when you hear “AI alt text generator”: can’t I just drop images into ChatGPT and ask it to write alt text? You can. But there’s a meaningful difference between a general-purpose AI describing an image and a purpose-built alt text model trained specifically on image-to-SEO-text pairs. Here’s what that difference looks like in practice:
| Scenario | ChatGPT / general AI | ImageSEO AI alt text generator |
|---|---|---|
| Product image: red leather handbag | “A red handbag on a white background” | “Red leather handbag with gold clasp and structured silhouette — women’s designer bag” |
| Blog hero: person working at laptop outdoors | “A person working on a laptop outside” | “Freelancer working remotely on a laptop in an outdoor café, lifestyle remote work photography” |
| Chart: bar graph showing traffic data | “A bar graph with blue bars” | “Bar chart showing organic traffic growth from 1,200 to 4,800 monthly visits over 6 months” |
| Bulk processing speed (500 images) | ~8 hours (manual paste per image) | ~35 minutes (fully automated via plugin) |
| Keyword context awareness | None — general description only | Reads page context and your site’s keyword focus to tune descriptions |
The technical difference: ImageSEO’s model is fine-tuned on SEO alt text specifically — it understands that “a person” is weak alt text for a blog post about remote work, and that Google needs the contextual descriptor (“freelancer,” “remote work,” “outdoor café”) to understand what the image represents for ranking purposes.
It also runs natively inside WordPress. No API calls you manage, no per-image copy-paste, no switching between tools. Install the plugin, run a scan, and your entire media library gets properly described alt text — including images you uploaded three years ago and forgot about.
A lot of “free alt text generators” are free for 3 images, then hit you with a paywall. Here’s exactly what ImageSEO’s free tier includes — no asterisks:
| Feature | Free tier | Paid (from €4.99/mo) |
|---|---|---|
| AI alt text generation | ✅ 50 images | ✅ 1,000–unlimited images/mo |
| WordPress plugin | ✅ Full plugin, no restrictions | ✅ Same plugin |
| Bulk media library scan | ✅ Scans everything, optimises 50 | ✅ Optimises everything found |
| Multilingual alt text | ✅ Yes — generates in your site language | ✅ All 7 supported languages |
| Auto-generate on new uploads | ✅ Yes (counts against your 50) | ✅ Automatic, no quota stress |
| Credit card required | ❌ No card needed | Card required at upgrade |
| Best for | New sites, testing, <50 image libraries | Established sites with backlog + ongoing uploads |
50 images covers an entire new WordPress site or a full test run on your highest-traffic pages. No commitment, no card, no time limit on the free tier — use all 50 whenever you’re ready.
No. Google does not penalize AI-generated content as long as it is accurate and useful. In December 2023 Google updated its guidelines specifically to clarify that AI-assisted content is fine. What matters is whether the alt text describes the image accurately and helps users — which our generator does measurably better than a human rushing through 2,000 product images.
Yoast and Rank Math check whether alt text exists and analyze it. They don’t generate it. Our tool is complementary: install ImageSEO alongside your existing SEO plugin. ImageSEO creates the alt text; Yoast/Rank Math grades it. Most of our customers run both.
Yes — WooCommerce product images are the most common use case. The generator reads product titles and categories to write keyword-aligned alt text that matches each product page’s commercial intent. Particularly effective for stores with 500+ SKUs where manual alt text is impractical.
Yes. Every image goes through a review step by default. You can approve in bulk, tweak individual entries, or regenerate with different settings. Once approved, the alt text writes to the WordPress media library and renders on your live site immediately.
The generator writes in 30+ languages including English, French, German, Spanish, Italian, Portuguese, Polish, Japanese, and Chinese. It auto-detects the language of your page content and generates alt text in that language. Essential for multilingual WooCommerce stores using Polylang or WPML.
50 images free (no credit card). Paid plans start at €4.99/mo for 1,000 images or €24.99/mo for 10,000 images. Annual billing saves 20%. Enterprise plans available for 100k+ images. See full pricing.
Yes — our generator writes alt text that passes WCAG 2.1 AA requirements. It describes images accurately and specifically, which is what screen readers need. Accessibility and SEO goals converge 95% of the time; our tool optimizes for both simultaneously.
The alt text stays. It’s written directly to the WordPress media library, not stored in our plugin. If you uninstall, your images keep the alt text we generated. No lock-in.
Not sure how to write them? Read our alt tags for SEO guide — 20+ real examples included.
50 free images on signup. No credit card. WordPress plugin installs in 30 seconds.
Already have images uploaded? Use our free alt tag checker to audit existing alt text across your site and find gaps instantly.