Check a page’s on-page SEO
Paste the page’s source code (the HTML behind the page) and you get a preview of how it would look in Google, plus twenty checks, each explained in a sentence rather than as a score. Title and description are measured in pixels, because that is how Google actually cuts them off.
- Runs entirely in your browser
- Works offline
- No upload
- No sign-up
- No watermark
Loading the tool…
How it works
- Open the page you want to check, press Ctrl+U to see its source code, select all and copy.
- Paste it here (or drop a saved .html file).
- Read the preview and the checks; download the report if you need to send it on.
Why nothing is uploaded
Every operation on this page is done by code running inside your browser tab, using the same engine that renders web pages. The file is read from disk into your tab’s memory, transformed there, and written back out as a download. It is never sent anywhere — not to us, not to a third party.
Verify it yourself
- Open your browser’s developer tools (F12) and select the Network tab.
- Load your file and run the tool.
- The only requests you will see fetch the tool’s own code — and, for a few heavy tools, their open-source engine from a public CDN — plus one small page-view ping to loreatec.jp (page address and title, nothing more). None of them carry your file.
Frequently asked questions
Why can’t I just enter a URL?
Because a browser is not allowed to read another website’s code — a built-in safety rule (the “same-origin policy”) blocks it. Tools that take a URL get round this by fetching the page from their own server, so your URL, your IP address and the page contents pass through someone else’s computer. Pasting the source avoids that.
Why measure pixels instead of counting characters?
Because Google cuts titles off by how wide they are on screen, not by how many characters they have. Sixty narrow letters fit where sixty wide ones do not, and thirty Japanese characters are wider than either. A character counter can therefore give confident but wrong advice. This tool shows the width in pixels next to the limit.
Does anything leave my browser?
No. Nothing is sent to a server. The whole tool is a small program that runs inside your browser tab. Once the page has loaded, it keeps working even with the internet switched off.