FreeNo account needed
Free website testing tools
Check one page for layout, links, accessibility and launch mistakes in a real browser, with every problem explained. Built on the same engine as UICheck’s full checks.
Responsive Design Checker
Phone, tablet and laptop side by side, with every layout break found and explained.
Open the toolMobile-Friendly Test
Your page on a real phone: sideways scrolling, tiny text, tap targets and overlaps.
Open the toolBroken Link Checker
Every link on a page, menus included: pages that are gone, server errors, dead domains.
Open the toolWebsite Accessibility Checker
WCAG 2.2 problems on a page: contrast, labels, keyboard use and headings, in plain words.
Open the toolMeta Tag Checker
Title, description, social preview image, noindex and canonical: what search and sharing see.
Open the toolColor Contrast Checker
Two colours in, WCAG AA and AAA pass or fail out, with the nearest colour that passes.
Open the tool
Which one do I need?
Start from the question you have
Each tool answers one question about one page. Pick the line closest to yours; every result names the element, the screen size and the fix.
| Your question | Tool | What it checks | Screens |
|---|---|---|---|
| Does my page work on phones, tablets and laptops? | Responsive Design Checker | Sideways scrolling, cut-off text, overlaps, small text, tap targets, squeezed pictures | iPhone 17, iPad and a 1280px laptop |
| Will Google and my visitors find it mobile friendly? | Mobile-Friendly Test | The same layout checks plus form fields, on one phone | iPhone 17 (402px) |
| Are any links on the page broken? | Broken Link Checker | Every link, including closed menus: missing pages, server errors, dead domains, anchors with no target | One laptop screen |
| Can everyone use it, including with a keyboard or screen reader? | Website Accessibility Checker | WCAG 2.2: contrast, labels, headings, keyboard focus and traps, form errors | One laptop screen |
| What do search results and shared links show? | Meta Tag Checker | Title, description, social image, favicon, noindex, canonical, robots.txt, certificate | One laptop screen |
| Is this text colour readable on that background? | Color Contrast Checker | WCAG AA and AAA for normal and large text, and the nearest colour that passes | Runs in your browser |
How they work
A real browser, not a guess from the code
- 1Paste an addressAny public page: live or staging, WordPress, Shopify, Next.js or plain HTML. Nothing to install.
- 2We open it like a visitorChrome loads the page at real screen sizes, waits for fonts, hides common cookie banners and scrolls through so lazy pictures load.
- 3You get the problems, explainedEach one with where it is on the page, the screen size it happens at, why it matters and what to change.
Free tools or a full check?
The tools check one page for one kind of problem. A UICheck account runs every check at once, on every screen size you choose.
- Free tools
- One page, one kind of check, the top 5 problems. No account.
- Free account
- Every check on one page at 5 screen sizes, every finding with its fix, 5 checks a day, PDF and Excel reports.
- Lens and Prism
- Whole sites page by page, Safari and Firefox, every width from 320 to 1920px, Figma comparison and weekly monitoring.
Questions
Are the tools really free?
Yes. No account and no card. Each network can run 5 checks an hour and 15 a day across all the tools; with a free account you get 30 an hour and 100 a day.
Why do I only see the first 5 problems?
The tools show the five that matter most, merged across screen sizes. Sign up free to see every problem on the page with its fix; the check starts again for you after sign-up.
Is it a real browser?
Yes. Each tool opens your page in Chrome at real screen sizes, waits for it to load, hides common cookie banners and scrolls through it so lazy images load, then runs the same checks as a full UICheck check.
Do you keep my results?
A tool’s result and its screenshots are deleted after an hour. Anyone with the result link can open it until then.
Can I check localhost or a password-protected staging site?
Not with the free tools: they run on our servers, which can’t reach your computer or log in. In the app you can check a staging site behind a basic-auth login, and the CLI can check localhost on your own machine.
All of these, on every page and screen, in one check.
Free account, 5 checks a day on 5 screen sizes, no card. Lens and Prism check whole sites and watch them every week.