Free tools

Free SEO & content tools, no sign-up.

Fast, private utilities that run entirely in your browser — no sign-up, no limits. Each one handles a single step; Essel automates the whole pipeline.

Convert

Markdown to HTML

Turn Markdown into clean, semantic HTML in real time.

HTML to Markdown

Convert messy HTML into clean, portable Markdown.

Generate

Schema Markup Generator

Generate valid JSON-LD structured data for rich results.

Robots.txt Generator

Create a correct robots.txt with the right crawl rules.

Meta Description Generator

Write meta descriptions that fit and earn the click.

Analyze

Readability Checker

Score readability with Flesch and grade-level metrics.

Keyword Density Checker

See which terms and phrases dominate your content.

Heading Structure Analyzer

Audit your H1–H6 outline for hierarchy issues.

Optimize

Open Graph Preview

Preview your link card and generate Open Graph tags.

Anchor Text Suggester

Generate natural, varied anchor text for internal links.