#DHSeaDev — Free web tool — Website report card
DHSea Score
DHSea Score is a free website report card that grades one public web page on security, SEO, accessibility, best practices and speed, then lists the fixes worth doing first. Paste an address, get a plain-English letter grade, and keep your last twenty reports if you make an account.
Free. Two grades a day without an account, five with one. Questions: dhseadev@gmail.com
What the grade covers
The grade is a static review of one page load plus the page source. It looks at the single address you enter, not the rest of the site, and it never logs in or clicks through anything. That is a deliberate limit, and the report says so at the top.
Security
Transport, headers, cookie flags and the other things a first response can reveal. Weight 27%.
SEO
Titles, descriptions, canonical tags, structured data, headings and crawl signals. Weight 26%.
Accessibility
Static checks only: alt text, labels, landmarks, language and contrast hints. Weight 22%.
Best practices
The housekeeping that separates a tidy page from a neglected one. Weight 15%.
Speed
Server-side proxies only, such as response time and payload size, because no real browser is involved. Weight 10%.
Across the five categories there are 51 checks. The full list, with what each one tests, is on the How scoring works page.
Delight: a heuristic, not a feeling meter
Next to the grade sits a second number I wanted to try: a 0 to 100 Delight estimate for how warm and inviting the wording and visuals read. It is built from six signals you can see and argue with: speaking to the reader directly, positive wording, friendly microcopy, easy reading, visual care, and low friction. The score lands in one of four bands: Cold, Neutral, Warm or Joyful.
Delight is not part of the letter grade, and it is not a measurement of anyone’s emotions. It reads the first HTML response in English, so it cannot see animation, sound, or what a page feels like to use. I checked it against four hand-written test pages (playful, typical, bland, hostile) and it ranks them in that order. I have not yet validated it against human ratings, and the report offers a thumbs up or down so I can start collecting some.
Built in-house, on small parts
The scoring engine is my own code rather than a wrapper around someone else’s API. It runs on Cloudflare Pages with a small quota store, and accounts use Firebase sign-in with email confirmation. At the last full run the project had 159 unit tests, and 114 deliberately injected bugs were all caught by them. A passing test suite is not the same as a good product, so I also open the rendered pages and read them.
Reports can be downloaded as JSON, printed, or saved to your account, where a confirmed email keeps your most recent twenty. Opening a saved report does not fetch the site again and does not count against your daily limit.
Questions
What does DHSea Score check?
It runs 51 checks across security, SEO, accessibility, best practices and speed on one public page, using a single page load and the page source. Each check shows what it found and what to change, and the grade weights the categories at 27, 26, 22, 15 and 10 percent.
Is it the same as Lighthouse?
No. DHSea Score does not run a full browser, so its accessibility checks are static and its speed numbers are server-side proxies. Expect different results from a lab tool like Lighthouse, and treat this as a quick first review rather than a replacement.
Does the Delight estimate change my grade?
No. Delight is reported separately as a 0 to 100 estimate with its six signals shown, and it is labeled as a heuristic. If a page has too little readable text on first load, it shows n/a instead of guessing.
Can I grade any website, and are there limits?
Only public pages, since the tool fetches the address from the open internet. Intranet, localhost and other private addresses are refused, and the public versus private page explains the difference. You get two grades a day without an account and five with a free one.
Credits and privacy
DHSea Score is an independent tool and is not affiliated with any of the products it may detect on a page. Site owners who do not want to be graded can use the opt-out described on the bot page. What is stored and for how long is set out in its privacy notice, which is the authority on that rather than this page.
Built by #DHSeaDev — dhseadev@gmail.com
More from DHSeaDev
DHSea Score grades other people’s sites; ServeBoard is a local-first analytics tool where the data stays on your machine. The rest of what I have built is on the projects page, the build story is in A report card that is on your side, the two report cards for this site are in Grading my own site: 86 to 97, and the C- I left alone, and the rest of the notes are in the devlog, and the about page says who I am and how I work.