How it works
- Paste the full URL of the page you want to analyze (for example
https://example.com/page). - The tool fetches the actual page over HTTP, exactly as a crawler would, and parses its HTML.
- It evaluates a weighted set of on-page signals and calculates an overall score out of 100.
- You get a colour-coded checklist — green (pass), amber (warning) and red (fail) — with the specific value behind each check.
What it checks
- Title tag — presence and optimal length (30–60 characters).
- Meta description — presence and length (70–160 characters).
- Headings — exactly one H1, and a sensible heading structure.
- Content depth — enough real text (≥300 words) to satisfy intent.
- Images — how many are missing descriptive ALT text.
- Links — internal vs external link balance.
- Mobile — a valid viewport meta tag.
- HTTPS & indexability — secure delivery and no accidental
noindex. - Performance — response time and content compression.
Common use cases
- Before publishing — catch missing tags or a weak title before a page goes live.
- Diagnosing a page that won't rank — quickly spot the on-page issues holding it back.
- Auditing a client or competitor page — get an objective snapshot in seconds.
- Routine maintenance — re-check important pages after edits or a redesign.
Example
Run the tool on a blog post and you might see a score of 78/100 with green checks for HTTPS, mobile and headings, an amber warning that the meta description is only 45 characters, and a red flag that 6 of 14 images are missing ALT text — a clear, prioritized to-do list.
Frequently asked questions
Is the On-Page SEO Audit free?
Yes — completely free, with no signup and no usage limits. You can audit as many pages as you like.
Does it use real data?
Yes. The tool fetches and parses the live page itself; nothing is estimated or randomized. The score reflects exactly what is in the page's HTML right now.
What's the difference between this and a full site audit?
This tool analyzes a single page in depth. To crawl many pages of a whole site at once, use the Technical Site Audit (Crawler). For tag-level detail use the Meta Tag Analyzer, and learn the fundamentals in our on-page SEO guide.
Is this an online URL audit tool?
Yes — paste any URL and the on-page SEO audit runs entirely online, with no install and no signup. It is a fast way to do an online SEO audit or URL audit and get a prioritized fix list for a single page.