What powers validator.nu?
Last seen Jun 2026 · 3 technologies across 3 categories
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| html w3 validator | #3 | 25 |
| html code validator online | #7 | 12 |
| html validation | #7 | 6 |
| nu html validator | #2 | 5 |
| html verifier | #5 | 5 |
| html checker online | #10 | 5 |
| html code checker | #11 | 4 |
| check html | #9 | 2 |
| validator | #7 | 2 |
| valid html checker | #5 | 2 |
| html code validator | #11 | 2 |
| check valid | #57 | 1 |
| check html valid | #7 | 1 |
| check html code | #43 | 1 |
| code validator | #26 | 1 |
| code validate | #12 | 1 |
| validator html w3 | #22 | 1 |
| w3 html validator | #46 | 1 |
| nuvalidate | #14 | 1 |
| html site checker | #8 | 1 |
| html markup validator | #6 | 1 |
| html lint online | #9 | 1 |
| css and html validator | #9 | 1 |
| chrome html validator | #7 | 0 |
| code validation | #97 | 0 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 100% desktop
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
7.02 / 10 · ranked #38,577 of all domains
373 referring domains · OpenPageRank
Search traffic
82 est. monthly organic visits (US)
48 keywords in Google's top 30
Core Web Vitals
| LCP | 1.1 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- Weight: 0.0 MB · 4 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| about.validator.nu | 3 |
| html5.validator.nu | 3 |
| validator.nu | 1 |
| www.validator.nu | 1 |