Project Description
Alt Text Auto-Fill is a free, Open Source Chrome extension that automatically detects and fills missing alt text for images across the web. It was built to help screen reader users, developers, educators, and accessibility advocates make the internet more inclusive, without requiring technical expertise or paid services.
Powered by TensorFlow.js and the coco-ssd model, the extension works completely offline. It analyzes image content using AI, and then enhances results with filenames, surrounding HTML context, CSS classes, and page structure to generate meaningful descriptions.
Whether you're a developer testing accessibility, a content creator ensuring inclusive design, or a user who wants to contribute to a more accessible web, Alt Text Auto-Fill makes it simple to improve the browsing experience for everyone.
This project reflects our mission to break down digital barriers and ensure that web content is accessible to all people, regardless of visual ability. By making this tool free and open source, we're empowering users worldwide to participate in creating a more inclusive internet.
Project Roadmap
While Alt Text Auto-Fill already provides intelligent AI-powered alt text generation using TensorFlow.js and coco-ssd, the roadmap focuses on improving accuracy, expanding language support, and adding developer tools.
Current Focus
- AI-based object detection with TensorFlow.js and coco-ssd
- Pattern-based heuristics (filenames, URLs, context)
- Automatic processing of all images on page load
- Dynamic content support (SPAs, infinite scroll)
- Right-click context menu for manual generation
- Extension popup with statistics and controls
- 100% offline operation – no data ever leaves the browser
Planned Features
- Multi-language alt text generation
- Advanced context detection using page semantics
- Accessibility audit reports
- Keyboard shortcuts for power users
- Community-contributed pattern libraries
- Educational mode showing why specific alt text was chosen
- Optional OpenAI integration for smarter alt tags
Team
Software for Progress Foundation
This project was developed internally by Software for Progress Foundation as a practical demonstration of privacy-respecting, Open Source software. It’s designed to empower users with tools that protect sensitive data while staying simple and accessible.
🌐 Website: softwareforprogress.org
Project Links
- Chrome Web Store: chromewebstore.google.com/detail/alt-text-auto-fill/ldgghfoheoipmffiidhcgjgnhmjnmkpc
- Source Code: github.com/SoftwareforProgress/Alt-Text-Auto-Fill
- Documentation: github.com/SoftwareforProgress/Alt-Text-Auto-Fill/wiki
- Issue Tracker: github.com/SoftwareforProgress/Alt-Text-Auto-Fill/issues