Free tools
Free website and email checkers
Quick checks for the things that quietly cost small businesses enquiries, with plain-English results and fixes. Free, with no sign-up.
Three checks: whether email from your domain is set up to reach inboxes, whether the images on a page have alt text screen readers can use, and how a page will look on Google, LinkedIn and Facebook. Each takes seconds and tells you what to fix. They’re built and maintained by 37 Digital, a web studio in London.
Email security checker
See whether email from your domain is set up to reach inboxes and stop others sending as you. Checks SPF, DKIM and DMARC.
Image alt text checker
Find images on a page that screen readers can’t describe, and how to fix them.
Link preview checker
See how your page will look on Google, LinkedIn and Facebook before you share it, and what to fix.
Which checker do I need?
- Email going to spam, or worried someone could send email pretending to be you: Email security checker
- Images screen readers can’t describe, or questions about whether your images meet accessibility standards (WCAG): Image alt text checker
- Links that look wrong when you share them, or writing page titles and descriptions: Link preview checker
How the tools work
Each check runs once, when you ask for it, and we don’t keep your results. To find out what the tools look at and the limits on how often they run, read about our checker. Our privacy policy covers what we keep and for how long.
Found something you’d rather not fix yourself? Get in touch and we’ll take a look.