Make any website accessible
while you browse
xsbl helps developers fix their own sites. But billions of pages haven't been fixed yet. The extension gives everyone — people with low vision, color blindness, motor impairments, dyslexia, or anyone who wants a better web — instant accessibility on every page they visit.
Works out of the box
Install the extension and these features activate immediately. No signup, no login, no friction.
Contrast & text scaling
Boost the contrast ratio of any page by 25% and scale text from 100% to 160%. Applied instantly via CSS — no reloading, no layout breakage. Works on every site including SPAs and shadow DOM.
FreeKeyboard navigation overlay
Injects a skip-nav link at the top of every page, adds visible 3px focus rings on every focusable element, and overlays numbered tab-order badges so you can see exactly where Tab will take you.
FreeStop motion & media
One toggle to pause all videos, freeze animated GIFs (replaced with their first frame via canvas), kill every CSS animation and transition, and stop carousels and marquees. Essential for vestibular disorders, epilepsy, and ADHD.
FreePower tools for real needs
Sign in with your xsbl Pro or Agency account and these features unlock automatically. No extra cost.
Dyslexia-friendly mode
Switches the entire page to OpenDyslexic, widens letter-spacing to 0.08em, word-spacing to 0.16em, and line-height to 1.8×. Adds a reading ruler that follows your cursor. Caps paragraph width at 70 characters.
ProColor blindness correction
SVG color matrix filters tuned for protanopia, deuteranopia, and tritanopia using the Brettel/Viénot/Mollon perceptual model. Remaps colors into distinguishable ranges without distorting images.
ProARIA & heading auto-fix
Scans the DOM and injects missing landmark roles, corrects heading skip-levels via aria-level, labels icon-only buttons, and associates orphaned form inputs with aria-label from placeholders.
ProAI alt text generation
Finds every <img> missing alt, sends them to Claude Vision, and injects descriptions directly into the DOM. Screen readers pick them up immediately. 100 images/day on Pro, 500 on Agency.
ProCaption detection
Scans for HTML5 videos without <track> captions, YouTube/Vimeo embeds, and audio without transcripts. Overlays a visible warning with instructions to enable captions.
ProRead aloud (TTS)
Reads page content aloud paragraph by paragraph using the Web Speech API. Each paragraph highlights as it's spoken, scrolling smoothly into view. Adjustable speed.
ProReading mode
Strips navigation, sidebars, ads, and clutter. Shows just the article in a clean serif-font overlay with 680px max-width and generous line-height.
ProColor tint overlays
Adds a semi-transparent colored overlay. 12 presets — peach, lemon, mint, lavender, ice blue, rose, cream, sage, blush, sky, sand, and grey. For Irlen syndrome and visual stress.
ProAccessible font override
Replaces the page font with Lexend, Atkinson Hyperlegible, or OpenDyslexic. Fonts loaded from Google Fonts CDN.
ProHow it works
Install the extension
Add xsbl to Chrome from the Web Store. Free features work immediately — no account needed.
30 secondsSign in to unlock Pro
Click 'Sign in' in the popup. If you have an xsbl Pro or Agency account, all features unlock automatically.
One clickToggle what you need
Every feature is a toggle. Settings save per-site — your preferences for GitHub are different from your news site.
Per-siteFree vs Pro
| Feature | Free | Pro |
|---|---|---|
| Contrast & text scaling | ||
| Keyboard navigation overlay | ||
| Stop motion & media | ||
| Dyslexia-friendly mode | — | |
| Color blindness correction | — | |
| ARIA & heading auto-fix | — | |
| Caption detection | — | |
| Read aloud (TTS) | — | |
| Reading mode | — | |
| Color tint overlays | — | |
| Accessible font override | — | |
| AI alt text generation | — | |
| Per-site settings | ||
| AI images per day | — | 100–500 |
Frequently asked questions
The web should work for everyone.
Start with the free features, upgrade when you're ready.
Add to ChromeOr sign up for xsbl to unlock Pro features