What does the SEO Analyzer check?

It crawls every internal page on your site and audits: title tag (presence, length 30–60 chars, duplicates), meta description (presence, length 50–160 chars, duplicates), heading structure (single H1, no hierarchy skips), canonical URL (presence, self-referential vs. cross-domain), Open Graph tags (og:title, og:description, og:image, og:url), Twitter Card, noindex directives, viewport meta tag, JSON-LD structured data, and missing image alt text.

How is the SEO score calculated?

Each page starts at 100. Errors (missing title, multiple H1s, missing canonical, noindex) deduct 15 points each. Warnings (title too long/short, missing description, missing OG image) deduct 5 points each. Info items (missing Twitter Card, missing viewport) deduct 2 points each. The score is clamped at 0 minimum.

What is an SEO canonical issue?

A canonical issue occurs when a page lacks a canonical URL tag (CANONICAL_MISSING) or when the canonical points to a different domain than the page itself (CANONICAL_MISMATCH). Missing canonicals allow search engines to index multiple URL variations, splitting PageRank. Mismatched canonicals can accidentally signal to search engines that the authoritative version is on a different domain.

Why does my page have a duplicate title warning?

Duplicate titles occur when two or more pages share the exact same tag. Search engines use the title to understand each page's unique topic — duplicate titles make it harder to rank individual pages and can cause search engines to choose which page to show in results, often picking the wrong one.

What is Open Graph and why does it matter?

Open Graph tags (og:title, og:description, og:image, og:url) control how your pages appear when shared on social networks like Facebook, LinkedIn, and Slack. Missing og:image is the most impactful — pages without it show as plain text links instead of rich previews, significantly reducing click-through rates from social shares.

Can I audit a site via the API?

Yes. POST to /api/v1/seo-analyzer/scan with your URL and options. You'll receive a scanId and WebSocket URL to stream results in real-time, plus GET endpoints to retrieve pages, stats, and export CSV/JSON.

Free · No signup · Real-time API Docs

Full-site SEO audit
in one click.

Crawls every page and scores your SEO — title tags, meta descriptions, heading hierarchy, canonical URLs, Open Graph, noindex, and structured data all audited live. Results stream as each page is analyzed. Export as CSV or JSON. Free, no account required.

Ready

URL	Perf	SEO	A11y	Best Practices	LCP (ms)	CLS

URL	Score	Issues	Title	H1 Tags	Skips	Canonical	OG Image	Indexable	Words	Lang

Load Past Scan

Example SEO audit — 12 pages checked

URL	Score	Issues	Indexable
/	94	OG_IMAGE_MISSING	✓
/blog/post-1	65	TITLE_TOO_LONG · DESC_MISSING	✓
/products	40	H1_MISSING · CANONICAL_MISSING · JSON_LD_MISSING	✓
/staging/test	25	NOINDEX_DETECTED · H1_MISSING · TITLE_MISSING	✗

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How the SEO Analyzer works

1
Enter your URL
Paste any http or https URL. The analyzer starts from that page and crawls inward.
2
BFS crawl + SEO extraction
Every internal page is fetched and parsed for 16 SEO signals simultaneously.
3
Live scoring
Each page gets a score 0–100. Errors cost 15 pts, warnings 5, info items 2.
4
Filter and export
Tab through issue categories, sort by score, export CSV or JSON for your team.

What gets audited on every page

Title tag

Presence, length (30–60 chars recommended), and duplicate detection across all crawled pages.

Meta description

Presence, length (50–160 chars), and duplicates. Missing descriptions reduce CTR in search results.

Heading hierarchy

Checks for exactly one H1, flags multiple H1s, and detects heading level skips (e.g. H1 → H3).

Canonical URL

Missing canonical, self-referential canonical, and cross-domain mismatch — all three states reported.

Open Graph

Audits og:title, og:description, og:image, og:url. Missing OG image is the most impactful gap for social sharing.

Noindex detection

Reads both <meta name="robots"> and X-Robots-Tag response header to catch all noindex directives.

Structured data

Detects presence of <script type="application/ld+json"> blocks and reports schema types found.

Image alt text

Counts images missing the alt attribute — important for accessibility and image search.

Frequently asked questions

: Each page starts at 100. Critical errors (missing title, multiple H1s, missing canonical, noindex) each deduct 15 points. Warnings (title too long, missing OG image, missing description) deduct 5 each. Info items (missing Twitter Card, missing viewport) deduct 2 each. Scores below 60 need urgent attention.
: Duplicate titles occur when two or more pages share the exact same <title> value. Search engines rely on page titles to understand each page's unique topic. Duplicates make it harder to rank individual pages and can cause Google to pick which version to show, often selecting the wrong one.
: Missing canonical tags allow search engines to index multiple URL variations of the same content (e.g. with/without trailing slash, with/without parameters). This splits PageRank across duplicates and can prevent any single version from ranking well. It's a structural SEO issue, not just a best-practice gap.
: Up to 200 pages per scan (configurable via the SEO_MAX_PAGES environment variable on self-hosted installs). Crawl depth (1–10) and concurrency (1–20) are both configurable. For larger sites, use the API with pagination.
: Yes. POST /api/v1/seo-analyzer/scan returns a scanId and WebSocket URL. Connect via WebSocket to receive real-time seo:progress frames. Use GET /api/v1/seo-analyzer/scan/:id/pages to retrieve results, and GET /api/v1/seo-analyzer/scan/:id/export?format=csv to download the report.
: Yes — robots.txt is respected by default. You can disable it in Advanced Options if you want to audit disallowed paths on your own site. The crawler identifies itself as ByteWaveNetworkBot.

Complete your SEO workflow

→ Schema Markup Tester — validate your JSON-LD, Microdata, and RDFa
→ Link Checker — find broken links that hurt crawl budget and UX
→ Sitemap Validator — ensure your sitemap only lists healthy, indexable URLs

ByteWaveNetwork Team

Built by developers who spend too long manually checking sites before launches. Every check in the SEO Analyzer reflects real pre-launch workflows: the canonical check catches the "forgot to remove noindex from staging" incident, the duplicate title check catches CMS template bugs, and the OG image check catches the reason your last blog post looked terrible on Slack.

Sunny Pal Singh

Fellow · Technical Director

Building developer tools at ByteWaveNetwork since 2012. Every utility here was built because we needed it ourselves and couldn’t find one done right elsewhere. LinkedIn →

Full-site SEO auditin one click.