35 SEO tools, free

Title angles and topics structured for AI citation and answer-engine visibility.

Restructure copy so answer engines can quote it — readability, keywords, and rewrite tips.

Generate descriptive, accessible alt text for an image from its context.

Turn any URL into buyer questions grouped by awareness stage and scored for AI-search intent.

Expand a seed keyword through Google Autocomplete — questions plus full a–z suggestions.

Merge two lists (locations × services, modifiers × head terms, etc.).

Word/phrase frequency, prominence and over-optimization — from text or a live URL.

Find out if search + AI crawlers can index a page — and exactly what's blocking it.

Fetch and debug title, description, canonical, robots, Open Graph and Twitter tags.

Check heading hierarchy (H1–H6) and structural issues from a URL.

Final URL after redirects vs. rel=canonical — a consistency check.

Fetch robots.txt for any site and test paths against AI bots and Googlebot.

Parse a sitemap or sitemap index; count URLs and sample entries.

Fetch a page as Googlebot and compare title, description and robots meta.

External sites a page links to — parsed from the HTML.

Follow the full redirect chain hop by hop; catch loops and downgrades.

Grade security headers (HSTS, CSP, frame protection…) and dump the response.

Core Web Vitals and lab metrics via Google PageSpeed Insights.

Click-worthy description drafts with character guidance for SERP snippets.

Title patterns with length hints; add an optional brand suffix.

Clean, UTF-8-safe slugs for new pages and posts.

JSON-LD for Article, Product, FAQ, Organization and more.

Build robots rules, disallows, crawl-delay hints and sitemap lines.

Create XML sitemap entries with priority and changefreq.

H2/H3 skeleton you can paste into your editor.

Structured brief: goal, audience, keyword, outline, on-page checklist.

Call-to-action lines by tone: neutral, urgent or friendly.

Length, power words and a heuristic score for titles or headlines.

Extractive summary: pulls the most representative sentences (no AI).

Preview a Google-style snippet with pixel/character awareness.

See link previews for social platforms from your tags.

Blend internal hours, agency retainer and tools into a monthly estimate.

Rough organic revenue from sessions × CVR × AOV, minus spend.

Convert JSON arrays to spreadsheet-ready CSV, locally in the browser.

Ahrefs DR for up to 10 domains at once — free public API, no key.