Free SEO Tools

Fast, focused SEO utilities for quick checks

Showing 6 of 6 tools

Markdown Editor

Write and edit Markdown with live preview. Export to PDF, HTML, TXT, or copy as rich text. Autosaves locally — no signup.

Visualise JSON as a tree, validate syntax, and format/minify in one place.

Validate JSON-LD & microdata, find fixes, and preview schema blocks by type.

Preview how your title, URL, and meta description may appear on Google (desktop + mobile).

Check robots.txt rules and see if you're blocking AI crawlers. Test if a URL is allowed for a user-agent.

Validate SKILL.md files against the Agent Skills specification and skills-ref. Check frontmatter, name, description, and all spec compliances.

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