On-Page SEO Audit Tool
Paste any URL and get an instant, structured breakdown of the on-page SEO factors search engines actually evaluate — title tags, meta descriptions, heading hierarchy, image alt attributes, internal linking, and crawl files like robots.txt and sitemap.xml.
What This Tool Checks
A single scan pulls together the technical and content-level signals that most commonly cause on-page ranking issues.
Title & Meta Analysis
Flags missing, duplicate, or poorly-sized title tags and meta descriptions that hurt click-through rate.
Heading Hierarchy
Checks H1-H6 structure for logical order and keyword placement, a factor both search engines and screen readers rely on.
Image & Alt Text Audit
Detects images missing alt attributes, which affects both accessibility and image search visibility.
Robots.txt & Sitemap
Verifies your crawl directives and sitemap are reachable and correctly configured for search engine bots.
Internal Link Mapping
Counts and reviews internal links to highlight orphaned pages and weak link equity distribution.
Actionable Scorecard
Summarizes findings into a prioritized checklist so you know exactly what to fix first.
How It Works
No install, no crawler setup — just a URL and a few seconds.
Enter the page URL
Paste the full URL of the page you want audited.
Run the scan
The tool fetches the page and parses its HTML for on-page SEO signals.
Review the scorecard
Get a categorized breakdown covering titles, headings, images, links, and crawl files.
Fix and re-check
Apply the recommendations, then re-run the audit to confirm improvements.
Who Uses This Tool
Built for the people who are actually responsible for a page ranking well.
This tool is maintained by SEO Jasoos, a SaaS built specifically for SEO practitioners, agencies, and site owners. The audit logic follows widely documented on-page SEO factors used by search engines, and the underlying data checks are refreshed as crawling and indexing guidance evolves.
Frequently Asked Questions
Is the on-page SEO audit free?
Yes. Every registered account includes monthly credits to run on-page audits at no cost, with no credit card required to sign up.
Does this replace a full technical SEO audit?
It covers the core on-page factors — titles, meta tags, headings, images, and crawl files — but a full technical audit typically also includes site speed, Core Web Vitals, and log file analysis.
Can I audit any website, or only my own?
You can audit any publicly accessible URL, which makes it useful for competitor research as well as your own site.
How often should I re-run the audit?
After any significant content or template change, and periodically (monthly is common) to catch regressions.
How often should I run an on-page audit?
Run a full audit quarterly, and scan any individual page whenever you publish or substantially update it. If you are running a site with frequent template changes, monthly checks catch problems introduced by deployments before they affect indexing.
Which on-page factors matter most?
In practical order: indexability first (canonical, meta robots, robots.txt), then content relevance and depth, then title tags, then internal linking, then heading structure and image optimization. The first category is binary — get it wrong and nothing else applies.
Does keyword density still matter?
No. Keyword density has not been a meaningful factor for many years and optimizing toward a target percentage tends to produce worse content. Write naturally, cover the subject thoroughly, and use the terms your readers actually use.
What is the ideal content length?
There is no fixed number. The practical benchmark is the set of pages currently ranking for your target query — if they average 1,800 words, a 400-word page is unlikely to compete. Length is a symptom of thoroughness, not a cause of ranking.
Should I fix every issue the audit reports?
No. Prioritize by impact and by how many pages each issue affects. A missing alt attribute on a decorative icon is a genuine accessibility note but has effectively no ranking consequence. A canonical tag pointing at the wrong domain will hold back an entire site.
Can on-page changes hurt my rankings?
They can, if you rewrite pages that are already performing. Adding useful content, fixing broken canonicals, and improving structure are low-risk. Changing URLs, removing existing content, or rewriting titles on pages that already rank carry real downside and should be approached carefully.
The On-Page SEO Checklist
Work through these in order — the items near the top affect more pages than the ones near the bottom.
1. One H1 per page
Every page should have exactly one H1 that describes what the page is about. Multiple H1s dilute the signal; zero H1s leave search engines guessing from your title tag alone.
2. Unique, descriptive title tag
Aim for 50–60 characters so it displays fully in search results. Put the primary term near the front and the brand name at the end. Every page needs its own — duplicate titles across pages are one of the most common findings in any audit.
3. Meta description that earns the click
This is not a ranking factor, but it directly affects click-through rate. 150–160 characters, written as ad copy rather than a summary. If you leave it blank, search engines will write one for you from page text.
4. Self-referencing canonical
Every indexable page should declare its own URL as canonical. This prevents parameter and protocol variants from splitting signals, and it is the single most common source of serious indexing problems.
5. Logical heading hierarchy
H1 → H2 → H3 in order, without skipping levels. Headings are a structural outline for both readers and crawlers, not a styling tool.
6. Descriptive alt text on every image
Describe what the image shows. This serves screen reader users first and image search second. Decorative images should carry an empty alt attribute rather than no attribute at all.
7. Internal links with meaningful anchors
Link between related pages using anchor text that describes the destination. "Read our backlink checker guide" tells search engines something; "click here" tells them nothing.
8. Clean, readable URLs
Short, lowercase, hyphen-separated, and stable. Once a URL is indexed and ranking, changing it costs you more than any wording improvement will gain.
9. Accessible robots.txt and sitemap
robots.txt should not block CSS or JavaScript, and the sitemap should list only canonical, indexable URLs that return a 200 status.
10. Correct meta robots directives
Confirm no page you want ranked carries a noindex tag. This sounds obvious and it is still the cause of a meaningful share of sudden traffic losses.
11. Structured data where it fits
FAQPage, BreadcrumbList, HowTo, and Organization schema help search engines understand context and can earn richer search result formats.
12. Mobile viewport meta tag
Required for mobile rendering. Indexing is mobile-first, so the mobile version of your page is the version being evaluated.
13. Compressed, correctly sized images
Serve WebP or AVIF, set explicit width and height attributes, and lazy-load anything below the fold. Images are the most common cause of poor Largest Contentful Paint scores.
14. Content that answers the query
Match the intent behind the search, not just the keyword string. A page targeting an informational query should teach; one targeting a commercial query should help the reader choose.
15. No orphan pages
Every page you want indexed should be reachable through at least one internal link from another indexed page. Pages that exist only in the sitemap are crawled less and ranked lower.
How Search Engines Read Your Page
Knowing the sequence tells you why some fixes move rankings and others do not.
A crawler arrives at your URL and requests the HTML. Before parsing anything, it checks robots.txt to confirm the URL is allowed. If robots.txt blocks it, the process stops there — and this is worth understanding clearly, because a URL blocked in robots.txt can still appear in search results with no description, since the crawler was never permitted to read the noindex tag that would have excluded it properly.
Assuming access is granted, the HTML is parsed top to bottom. The head is processed first: title, meta description, canonical, meta robots, and structured data. This is why a canonical pointing at the wrong domain is so damaging — it is one of the first instructions read, and it frames how everything after it is interpreted.
The body is then converted into a structural outline. Headings define sections, and the text under each heading is associated with it. This is why heading hierarchy matters beyond appearance: it is the map used to decide what your page is about and which portion of it answers a given query.
Pages that depend on JavaScript to render their content enter a second rendering queue, which can take significantly longer than the initial crawl. Anything critical — main content, primary internal links, structured data — should be present in the initial HTML response rather than injected afterward.
Finally, internal links are extracted and queued for crawling, and the page is evaluated for indexing. A page with no internal links pointing to it is discovered late and re-crawled infrequently, which is the practical reason orphan pages underperform.
Title Tags and Meta Descriptions That Work
Two elements, disproportionate impact on how much traffic your rankings actually convert into.
Front-load the primary term. Search result titles are frequently truncated on mobile, and readers scan the first few words. "Free Backlink Checker — Analyze Referring Domains" survives truncation intact; "The Complete and Comprehensive Guide to Analyzing Your Backlinks" does not.
Write for a person, not a parser. Keyword stuffing in titles has been ineffective for years and actively reduces click-through rate. A title that reads naturally and states a clear benefit will outperform a keyword-dense one at the same ranking position.
Include a differentiator. When ten results all say roughly the same thing, the one that adds something concrete — "Free", "No signup", "Updated 2026", "In 60 seconds" — earns a disproportionate share of the clicks.
Treat the meta description as ad copy. It carries no ranking weight, but it occupies more visual space than the title. Use it to answer the reader's next question: what will I get, and what will it cost me?
Never duplicate either across pages. Duplicate titles and descriptions make it harder for search engines to distinguish your pages from each other, and they are among the fastest wins available in any audit because they are simple to find and simple to fix.
Fixing What the Audit Finds
A scorecard is only useful if it changes what you do next. Here is the order that produces results.
Start with anything blocking indexing. A noindex tag on a page you want ranked, a canonical pointing at another URL, or a robots.txt rule blocking a section — these are binary problems. Nothing else you fix on that page matters until they are resolved.
Then fix issues that affect many pages at once. A missing canonical pattern across a template, or a heading structure problem repeated site-wide, is worth more attention than a single page's meta description, simply because of scale.
Then improve your highest-impression pages. Pull your search performance data and find the pages already receiving impressions but few clicks. These are pages search engines already consider relevant — they need depth and clarity, not discovery.
Re-scan after each change, not after all of them. If you deploy fifteen changes simultaneously and rankings move, you have learned nothing about which change was responsible. Change one thing, wait, measure, then proceed.
Leave working pages alone. The most expensive mistake in on-page SEO is rewriting a page that already ranks. If a page is performing, add to it — do not rebuild it.