SEO Audit Checklist for 2026
This comprehensive checklist covers everything you should check when auditing a website for SEO in 2026. Work through each section systematically, or run a free RankNibbler audit to check most of these items automatically.
On-Page SEO
| Check | Tool | |
|---|---|---|
| 1 | Every page has a unique title tag (30-60 chars) | Title Tag Checker |
| 2 | Every page has a unique meta description (120-160 chars) | Meta Description |
| 3 | Every page has exactly one H1 tag | Heading Structure |
| 4 | H2-H6 headings create a logical hierarchy | Heading Structure |
| 5 | All images have descriptive alt text | Image Alt Text |
| 6 | Canonical URLs are set on every page | Canonical URL |
| 7 | No pages are accidentally noindexed | Robots Directives |
Content Quality
| Check | Tool | |
|---|---|---|
| 8 | Important pages have 300+ words | Word Count |
| 9 | Content readability is appropriate for audience | Readability |
| 10 | Target keyword appears in title, H1, and first paragraph | Keyword Density |
| 11 | Content matches search intent for target keywords | Manual check |
Technical SEO
| Check | Tool | |
|---|---|---|
| 12 | Site uses HTTPS | HTTPS Checker |
| 13 | All domain variants redirect to one canonical URL | Redirect Checker |
| 14 | No broken links (404 errors) | Broken Link Checker |
| 15 | JSON-LD structured data is implemented | Structured Data |
| 16 | Open Graph tags are set for social sharing | Open Graph |
| 17 | HTML uses HTML5 doctype and UTF-8 charset | Doctype Checker |
| 18 | No deprecated HTML tags | Deprecated HTML |
| 19 | Sitemap.xml exists and is submitted to Google | Sitemap Guide |
Performance
| Check | Tool | |
|---|---|---|
| 20 | Scripts use async or defer | Script Loading |
| 21 | Images use lazy loading | Lazy Loading |
| 22 | Images have width and height attributes | Image Dimensions |
| 23 | Minimal external CSS and JS files | CSS/JS Counter |
Links and Navigation
| Check | Tool | |
|---|---|---|
| 24 | Strong internal linking between related pages | Link Analysis |
| 25 | No empty links (missing anchor text) | Empty Links |
| 26 | Nofollow used correctly on paid/UGC links | Nofollow Checker |
Run the Audit
Check individual pages on the RankNibbler homepage or audit your entire site with the site audit tool. For a deeper dive on two specific pages, use the SEO compare tool.
Check your site now: Run a free audit on the RankNibbler homepage to see how your page scores across 30+ SEO checks.
Last updated: March 2026