ALTtext.org

ALTtext.org creates image descriptions for use on the web, social platforms, and Apple devices. It is best suited to people who need alt text in several publishing workflows, from individual posts to team or API use. Its broad set of ways to generate descriptions is a strength; the free plan’s daily cap and image processing through Google’s Gemini API are worth weighing.

Overview

ALTtext generates written image descriptions in concise and detailed styles. Its web generator accepts JPEG and PNG images by drag and drop, file selection, or clipboard paste, and supports both single images and batches. That makes it useful for anything from preparing one social post to processing a collection.

The browser extension adds a generate button to ALT text fields on Bluesky, X/Twitter, Facebook, Instagram, LinkedIn, Threads, Tumblr, Pinterest, Mastodon, and Pixelfed. On other websites, it can generate a description from an image’s right-click menu. This wide coverage suits people who publish across platforms; someone with a single, fixed workflow may not need the extension’s reach.

ALTtext says generated results remain in the current browser. Its privacy policy says images are downscaled in the browser, sent to Google’s Gemini API for description, and not stored on ALTtext’s servers. The service has no accounts, does not sell data, and says it uses neither advertising nor cross-site tracking. Google, Stripe, Netlify, and Resend receive or store data for image generation, payment, hosting and records, or license emails. Usage counts reset daily; images are not retained, while license records are kept during an active license and for a reasonable period afterward.

Key features

ALTtext’s main practical advantage is that the same tool spans the web generator, browser extensions, and Apple apps. The Mac and iOS apps bring it to the desktop and share sheet, while the extension places generation in supported social-network alt-text fields and offers a context-menu option elsewhere. Bulk processing and API access extend that range for larger workflows, though API access is reserved for the Business / API plan.

Accessibility support includes VoiceOver, NVDA, JAWS, and keyboard-only use, and ALTtext says it builds to WCAG 2.2. Generated descriptions are announced and focused for screen readers to read aloud immediately. That makes the product a stronger fit for people who need the generation process itself to work with assistive technology, not just the resulting image text.

Pricing

The Free plan costs nothing, billed forever, and allows 20 ALT texts per day across the website, Apple apps, and browser extensions. It includes concise and detailed styles and requires no account. That is a useful ongoing allowance for light personal use, but a frequent publisher can reach the cap quickly.

Individual costs $9.99, paid once, billed one-time, for unlimited ALT text for personal, non-commercial use. It removes the free plan’s daily ceiling, but it is not the right license for commercial work. Team costs $19.99 a month, billed per month, and covers up to 5 seats with a commercial-use license and priority support. It is the clearest choice for a small working group that needs commercial rights; larger teams need a different arrangement.

Business / API costs $99 a month, billed per month. It adds API access, a generous quota, more seats, and bulk and ADA / EAA workflows, making it the plan aimed at higher-volume or integrated use. The Individual and Team plans are more economical for personal and small-team work, but do not include the stated API access or workflow features.

Platforms

ALTtext is available as a browser extension, on iOS and macOS, and on the web. Extensions support Chrome, Brave, Edge, other Chromium browsers, Firefox, and Safari on macOS and iOS. The mix is useful for people who move between desktop, mobile, and social publishing; readers who need another operating system should consider a tool with a matching platform.

Who it's for

ALTtext fits people who regularly add descriptions to images across several social platforms, and users who want the same capability in a browser, Apple share sheet, or desktop app. Its free allowance can suit occasional use; the Individual plan serves personal non-commercial use without a daily cap, while Team and Business / API address commercial and higher-volume needs. It is less suitable for commercial users seeking the lowest-cost plan, since the one-time Individual license is explicitly non-commercial.

Pros and cons

Pros: The free plan provides 20 daily generations across the website, Apple apps, and extensions without an account, so occasional users can use the same allowance across platforms.

Pros: Screen reader and keyboard support, including immediate announcement and focus of generated descriptions, makes the workflow accessible to assistive-technology users.

Pros: Support for multiple social platforms, right-click generation, bulk processing, and a paid API can accommodate varied publishing needs.

Cons: The Free plan’s 20-per-day limit may constrain regular publishing or batch work.

Cons: Images are sent to Google’s Gemini API, so users who do not want images processed by that service should look elsewhere.

Cons: Individual’s unlimited use is limited to personal, non-commercial work; commercial use starts with the monthly Team plan.

Alternatives

AI Alt Text Generators is a useful starting point for comparing the wider category.

Choose AutoAlt.ai if a lower monthly entry price and an API option matter: its Starter plan is $4.49 a month for 100 images, and its free plan gives 50 credits per month. AI Alt Text Builder may suit someone who prefers a web-only tool and can use their own OpenAI API key for unlimited single-image generations on its free plan; its Starter plan is $2.99 a month, billed yearly. Caseo is another option to compare for store-focused workflows. Alt Text Pro is worth considering for WordPress use: its free plan includes a WordPress plugin and 15 credits, plus 150 signup bonus credits that never expire.

Altagonist offers 50 credits per month on its free plan and supports Windows as well as web. WriteAlt may be a better fit for someone who needs Linux or Windows support alongside an extension and API; it offers a 25-credit free trial without a credit card. Alt Audit is an alternative to consider for bulk image processing and export capabilities, with its Starter plan at $5 a month for 800 credits. ALTification is another extension-and-web alternative to compare.

Verdict

ALTtext.org is a strong choice for people who want image descriptions across social services, Apple devices, and the web, especially when screen-reader support or a path to bulk and API workflows matters. The free plan is generous enough for occasional use, and the paid tiers separate personal use from commercial work. Look elsewhere if the 20-per-day free cap is too restrictive, if you do not want images sent to Gemini, or if you need commercial rights without a monthly plan.