Drag a button to your bookmarks bar, then click it on any webpage to run an instant accessibility check — no install, no sign-up, everything runs locally in your browser.
A bookmarklet is a tiny piece of JavaScript saved as a browser bookmark instead of a web address. When you click it, the code runs on the page you are currently looking at — so you can spot-check accessibility on your own site, a client’s site, or any page on the web. Nothing is uploaded or tracked; the code only reads the page in front of you.
Prefer to add it by hand? Each tool below has a “Copy the code manually” option — create a new bookmark and paste the code as its URL.
Scans every image on the page and flags ones with no meaningful alternative text. Images with a missing alt attribute get a red outline (likely errors); images with an empty alt="" get an amber dashed outline (verify they are truly decorative). A summary panel lists the offending image sources.
Drag the button above to your bookmarks bar (do not just click it here).
Select all (Ctrl/Cmd + A) inside the box, then copy (Ctrl/Cmd + C).
Shows the page’s heading structure (H1–H6) in reading order, flags a missing H1, skipped levels (e.g. H2 jumping to H4), and empty headings. Each heading is outlined on the page so you can see where it sits.
Drag the button above to your bookmarks bar (do not just click it here).
Select all (Ctrl/Cmd + A) inside the box, then copy (Ctrl/Cmd + C).
Checks visible text against its resolved background colour and flags anything below the WCAG 2.1 AA contrast minimum (4.5:1 for normal text, 3:1 for large text). Failing elements are outlined in red and listed with their measured ratio. Text over images or gradients is skipped rather than guessed.
Drag the button above to your bookmarks bar (do not just click it here).
Select all (Ctrl/Cmd + A) inside the box, then copy (Ctrl/Cmd + C).
These tools run entirely in your browser and never send any data anywhere. They are quick spot-checks, not a substitute for a full audit — automated tools catch only a portion of accessibility issues, and human review is always needed for things like meaningful alt text, logical reading order, and real-world contrast over images.
Need a complete WCAG 2.1 / AODA audit or remediation? Get in touch with A11ytek or request a free report.