Free SEO Tools & Analytics Audit Guide 2025

A complete SEO audit doesn't require expensive enterprise tools. This guide covers the best free tools across every SEO discipline.

Free SEO Tools by Category

CategoryToolBest For
Keyword ResearchGoogle Keyword PlannerSearch volume, competition data
Keyword ResearchAnswerThePublicQuestion-based keyword ideas
Technical AuditGoogle Search ConsoleIndex coverage, crawl errors
Technical AuditScreaming Frog (free tier)Crawl up to 500 URLs
BacklinksAhrefs Webmaster ToolsFree backlink analysis
BacklinksMoz Link ExplorerDomain authority check
On-PageSEO MinionH1/H2, meta, alt text check
SpeedGoogle PageSpeed InsightsCore Web Vitals
ContentSurfer SEO (free tier)Content scoring and optimization
Rank TrackingGoogle Search ConsoleAverage position, impressions

Monthly SEO Audit Checklist

  1. Index Status — Check Google Search Console for index coverage issues
  2. Crawl Errors — Review 404s, redirect chains, and server errors
  3. Core Web Vitals — LCP, FID, CLS scores from PageSpeed Insights
  4. Keyword Rankings — Track top 20 keywords in Search Console
  5. Backlink Profile — Check new and lost backlinks via Ahrefs
  6. Content Audit — Update outdated blog posts, fix thin content
  7. Competitor Analysis — Compare keyword gaps with competitors
Explore More Tools →

📊 数据说明 / Data Sources

数据来源：亚马逊美国站官方费用表（Amazon Seller Central）、亚马逊物流（FBA）费率页面。

计算逻辑：基于亚马逊公开的 FBA 费用规则计算仓储费、配送费、退货处理费等。实际费用因商品尺寸、重量、季节而异。

参考链接：
• 亚马逊FBA费用表
• 亚马逊FBA配送费率

免责声明：本计算结果仅供参考，实际费用以亚马逊 Seller Central 为准。