Free On-Page SEO Checker
Enter a page and the keyword it should rank for. We read the live page and check keyword placement, title, description, headings, content, images and links, with a heading outline. No sign-up.
- 01Enter a page and keyword
- 02We check it
- 03See what to fix
Heading outline
theStacc checks every page it writes against these rules before publishing, and writes and publishes SEO articles for your site every week.
Sign up for free →What is on-page SEO?
On-page SEO is everything on the page itself that helps search engines understand what it is about and helps readers find the answer: the title, the headings, the text, images, links and the technical tags. This checker reads your live page and tests it against the keyword you want it to rank for.
How it works
- Enter a page and its keyword. Use the phrase a searcher would type.
- We read the live page and run keyword, content, link and indexing checks.
- You see what to fix, keyword checks first, with a heading outline of the page.
On-page checklist
- Keyword in the title, near the start, in under about 60 characters.
- One H1 that says what the page is about.
- A meta description of 70 to 160 characters that invites the click.
- The main answer early, then subheadings that cover related questions.
- Descriptive alt text on images and links to related pages.
Frequently Asked Questions
Keyword placement (title, H1, meta description, first 100 words, URL, H2 headings and how often it is used), title and description length, one H1 and heading order, word count, image alt text, internal links, canonical and noindex. It also shows the page's heading outline so you can see its structure.
In the title (ideally near the start), the H1, the meta description and the first paragraph, and naturally in a few subheadings and the body. Write for the reader first: repeating the keyword too often reads as stuffing and does not help.
There is no magic number. We flag usage above about 3% of words because it usually reads as forced. Cover the topic fully and the keyword and its variations will appear naturally.
No. It checks how the page is built for the keyword. Rankings also depend on content quality, links from other sites and competition.
No. We read the page when you click the button, send the results to your browser and keep nothing. The tool is free with no sign-up; each visitor can run a limited number of checks in a short period.
Last updated 2026-09-28.
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