01
Robots.txt Tester
Tests whether a given URL is allowed or blocked by a robots.txt file, showing which rule…
On-Page SEO Checker
Analyses a page's HTML for title, description, headings, images, links, structured data and common on-page problems.
SEO
Nothing uploaded
No sign-up
Free, unlimited
Paste something on the left to see the result.
In short
On-Page SEO Checker is a free online tool on inputtesthub.com that analyses a page's HTML for title, description, headings, images, links, structured data and common on-page problems. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.
How to use the On-Page SEO Checker
- Paste your code into the input area.
- Choose the indentation and output options you want.
- Read the formatted result, then copy or download it.
About the On-Page SEO Checker
The On-Page SEO Checker analyses a page's HTML for title, description, headings, images, links, structured data and common on-page problems. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Reviewing a page before it goes live.
- Auditing a competitor's markup.
- Teaching a writer what to check.
Details
| Checks run | Title presence and length, meta description, single H1, heading order, image alt text, internal and external link counts, canonical, robots, Open Graph, JSON-LD presence, word count, keyword placement |
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Frequently asked questions
Do I need an account to use the On-Page SEO Checker?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the tool.
Is my data uploaded anywhere?
No. The On-Page SEO Checker runs entirely in your browser using JavaScript. Your input never reaches inputtesthub.com or any third party — open your browser's Network tab while you use it and you will see no request go out.
What is the On-Page SEO Checker used for?
In practice it gets used for three things: reviewing a page before it goes live. Auditing a competitor's markup. Teaching a writer what to check. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Can I use the On-Page SEO Checker on mobile?
Yes. The page is responsive and the tool works in Chrome, Safari, Firefox, Edge and Samsung Internet on both Android and iOS. There is no app to install and nothing to sign into.
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