Best Free SEO Tools for 2026
You do not need to pay hundreds per month for SEO tools. Here are the best free tools available in 2026, including tools built into RankNibbler.
Free SEO Audit Tools
| Tool | What It Does | Limits |
|---|---|---|
| RankNibbler | 30+ on-page SEO checks, keyword density, readability, tech stack, performance | Unlimited, no signup |
| Google Search Console | Rankings, clicks, indexing status, Core Web Vitals | Your own sites only |
| Google PageSpeed Insights | Performance scores and Core Web Vitals | Unlimited |
| Bing Webmaster Tools | Bing rankings, SEO reports, backlinks | Your own sites only |
Free Keyword Research Tools
| Tool | What It Does |
|---|---|
| Google Keyword Planner | Search volumes and keyword ideas (needs Google Ads account) |
| Google Trends | Relative search interest over time |
| Answer the Public | Question-based keyword ideas |
| Ubersuggest | Keyword suggestions and difficulty scores (limited free) |
| RankNibbler Keyword Density | Analyse competitor keyword usage |
Free Technical SEO Tools
| Tool | What It Does |
|---|---|
| RankNibbler Site Audit | Crawl up to 200 pages, find issues across your site |
| RankNibbler Broken Links | Find dead links on any page |
| RankNibbler Redirects | Check HTTP/HTTPS/WWW redirect chains |
| RankNibbler Schema Generator | Create JSON-LD structured data |
| Google Rich Results Test | Validate structured data markup |
| Google Mobile-Friendly Test | Check mobile responsiveness |
The combination of RankNibbler + Google Search Console + Google PageSpeed Insights covers almost everything the paid tools offer for on-page and technical SEO.
Check your site: Run a free audit on the RankNibbler homepage — 30+ SEO checks with no signup required.
Last updated: March 2026