Website SEO Audit — On-Page Analyzer for Title, Meta, Links, Speed & Issues

Audit any page's on-page SEO in seconds — or crawl a whole site. Get the title, meta description, headings, link counts, word count, load time, an on-page score and a list of detected SEO issues — for one URL, a list of URLs, or an entire website.

What does Website SEO Audit do?

It runs a technical on-page SEO check in one of two modes:

• Instant — paste a list of page URLs (up to 1,000) and get one audit row per URL.
• Crawl — give one starting URL or domain and a page cap (up to 50). The Actor crawls the site and returns a site-summary row (site score, pages with issues, broken links and resources, duplicate titles and descriptions, 4xx/5xx counts) followed by an audit row for every crawled page, worst pages first.

Use it for site audits, client reports, migrations and pre-publish QA.

What you get per page

Field	Description
onpage_score	On-page health score, 0–100
status_code, is_redirect, is_https	HTTP status, redirect flag, HTTPS flag
title, title_length	Title tag and its length
description, description_length	Meta description and its length
h1, h1_count	First H1 and number of H1 tags
word_count	Words of visible text
internal_links, external_links	Link counts
broken_links	1 if the page links to a broken URL, 0 if not
images_count, images_without_alt	Image count; images_without_alt is 0 when every image has alt text, otherwise null and the no_image_alt issue is raised
canonical	Canonical URL
has_structured_data	Whether the page carries schema.org / microdata markup
duplicate_title, duplicate_description	Whether another crawled page shares the title / description (meaningful in crawl mode)
load_time_ms, dom_complete_ms	Total load time and DOM-complete time, in ms
ttfb_ms	Time to first byte — measured when Render JavaScript is on, otherwise null
issues, issue_count	Detected problems, e.g. no_title, title_too_long, title_too_short, no_description, no_h1_tag, no_image_alt, high_loading_time, is_redirect, is_4xx_code, is_5xx_code, is_broken, low_content_rate, has_render_blocking_resources, duplicate_meta_tags, deprecated_html_tags

largest_contentful_paint_ms and cumulative_layout_shift are part of the row but are null: they require full browser rendering, which this Actor does not perform.

What you get for the whole site (crawl mode)

The first row of a crawl has "type": "site-summary": pages_crawled, onpage_score, avg_page_score, pages_with_issues, broken_links, broken_resources, links_internal, links_external, duplicate_title and duplicate_description (number of pages affected), count_4xx, count_4xx_pages, count_5xx_pages and no_image_alt (pages with images missing alt text).

Use cases

• SEO audits — bulk-check a whole site or a content batch.
• Client reports — export a clean issue list per page.
• Pre-publish QA — catch missing meta, missing H1s and broken pages before they go live.
• Migrations — verify titles, canonicals and status codes after a move.
• Competitor benchmarking — compare your landing pages with competitors' on the same checks.

How to use

1. Pick a Mode: instant (a list of URLs) or crawl (one site).
2. Instant: paste your Page URLs (with https://). Crawl: set Site to crawl and Max pages to crawl.
3. Optionally turn on Render JavaScript for JavaScript-heavy sites (slower; also measures TTFB).
4. Click Start, then export JSON, CSV or Excel, or pull the dataset via the Apify API.

Example input — instant

{ "mode": "instant", "urls": ["https://www.notion.com/pricing", "https://slack.com/pricing"], "enableJavaScript": false }

Example input — crawl

{ "mode": "crawl", "target": "https://basecamp.com", "maxCrawlPages": 25 }

Input configuration

Field	Type	Default	Description
mode	string	instant	instant audits the listed URLs; crawl crawls one site.
urls	array of strings	—	Page URLs to audit in instant mode, up to 1,000.
target	string	—	Domain or URL to crawl in crawl mode.
maxCrawlPages	integer	25	Pages to crawl in crawl mode, 1–50.
enableJavaScript	boolean	false	Render pages with JavaScript before auditing.

Example output

A real instant-mode row:

{
  "type": "page",
  "url": "https://www.notion.com/pricing",
  "status_code": 200,
  "onpage_score": 97,
  "title": "Notion Pricing Plans: Free, Plus, Business, & Enterprise.",
  "title_length": 57,
  "description": "Learn more about our different pricing plans. We support everyone, from free personal accounts to enterprise businesses.",
  "description_length": 120,
  "h1": "One tool to run your company.",
  "h1_count": 1,
  "internal_links": 87,
  "external_links": 10,
  "images_count": 10,
  "images_without_alt": null,
  "word_count": 3430,
  "is_https": true,
  "canonical": "https://www.notion.com/pricing",
  "has_structured_data": false,
  "broken_links": 0,
  "duplicate_title": false,
  "duplicate_description": false,
  "is_redirect": false,
  "ttfb_ms": null,
  "dom_complete_ms": 38,
  "largest_contentful_paint_ms": null,
  "cumulative_layout_shift": null,
  "load_time_ms": 38,
  "issues": ["no_image_alt", "low_content_rate", "has_render_blocking_resources", "no_image_title"],
  "issue_count": 4
}

A real crawl-mode site-summary row:

{
  "type": "site-summary",
  "target": "https://basecamp.com",
  "domain": "basecamp.com",
  "crawl_progress": "finished",
  "pages_crawled": 10,
  "onpage_score": 98,
  "avg_page_score": 98,
  "pages_with_issues": 10,
  "broken_links": 0,
  "broken_resources": 0,
  "links_external": 75,
  "links_internal": 424,
  "duplicate_title": 0,
  "duplicate_description": 0,
  "count_4xx": 0,
  "count_4xx_pages": 0,
  "count_5xx_pages": 0,
  "no_image_alt": 1
}

How much does a website SEO audit cost?

Pay per page. No monthly fee.

Event	Price	When it is charged
Actor start	$0.001	Once per run
Page audit	$0.005	Per URL audited in instant mode
Crawl page	$0.004	Per page returned by a crawl (the site-summary row is free)

A URL that could not be audited is still returned (with an issues entry such as audit_failed) so every URL is accounted for, but it is not charged.

• Instant audit of 100 URLs: $0.001 + 100 × $0.005 = $0.501.
• Crawl of 25 pages: $0.001 + 25 × $0.004 = $0.101.
• Crawl of 50 pages: $0.201.

FAQ

Can it crawl a whole site? Yes — use crawl mode with a starting URL and a page cap of up to 50. Use instant mode to audit a specific list of URLs.

Can it render JavaScript? Yes — turn on Render JavaScript for single-page apps and JavaScript-heavy sites. It is slower, and it is also what enables the ttfb_ms measurement.

Does it measure Core Web Vitals (LCP, CLS)? No. Those need full browser rendering, so largest_contentful_paint_ms and cumulative_layout_shift are always null. You do get total load time, DOM-complete time and, with JavaScript rendering, time to first byte.

What issues does it detect? Missing or too long/short titles, missing descriptions, missing H1, images without alt text, slow load, redirects, 4xx/5xx errors, broken pages, thin content, render-blocking resources, duplicate meta tags and more — see the issues field above.

Why is images_without_alt null on some pages? The audit reports whether any image lacks alt text, not how many. When at least one does, the page gets the no_image_alt issue and the count is left null rather than guessed.

Can I use it with AI agents and automation tools? Yes. The output is clean JSON, ready for n8n, Make, Zapier and MCP-based agents.

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Tags: seo audit, on-page seo, site audit, technical seo, meta tags checker, seo analyzer, page speed, seo issues, website audit, seo crawler.