All Tools
SEO Tool

SEO WRITING ASSISTANT

Write better content that ranks higher — real-time readability, SEO, and AI readiness analysis with actionable recommendations.

Content

Paste or Type Your Content
Target Keyword (optional)
Structured Data (optional, for AI Readiness)

Paste JSON-LD structured data to check AI readiness completeness.

0
Words
0
Sentences
0s
Reading
0
Chars
0
Unique
0
Avg Wd
0
Long Wd

Content Grade

—
0/100
Grade Level
—
Reading Ease
—
Avg Sentence
—
words
Long Sentences
0
>25 words
Fog Index
—
target 7-12
Sent. Types
—
Transition Words
0found

Recommendations

Enter content to see recommendations.

Frequently Asked Questions

What does the SEO Writing Assistant check?
The tool analyzes your content across 5 dimensions: Readability (Flesch-Kincaid, sentence length, transition words), SEO (keyword density, placement, word count), Structure (heading hierarchy, paragraph length), AI Readiness (entity density, extractable chunks, structured data), and Voice (passive voice, sentence variety).
Is my content sent to any server?
No. All analysis happens entirely in your browser. Your content never leaves your device — the tool works fully offline after the initial page load.
What is a good content grade?
A grade of B+ (80/100) or higher is publish-ready. Grades below C (65) have critical readability, structure, or SEO issues that should be addressed.
What is entity density and why does it matter for AI?
Entity density measures how many named entities (brands, dates, prices, metrics) appear in each paragraph. AI/LLM retrieval systems favor content with 4-7 entities per paragraph because it signals factual depth and verifiability.
What keyword density is ideal?
A natural keyword density of 0.5% to 2.5% is ideal. Below 0.5% and search engines may not clearly identify your topic. Above 3% risks over-optimization.
Which browsers does this work on?
All modern browsers — Chrome, Firefox, Safari, Edge — on both desktop and mobile.

How to Use

01

Paste or Type Your Content

Paste your article, blog post, or webpage content into the text area.

02

Enter Your Target Keyword

Type the primary keyword you want to rank for. The tool checks its placement across headings, first 100 words, and overall density.

03

Review the Content Grade

The tool computes an A-F readability and SEO grade in real time, with specific warnings and recommendations for each dimension.

04

Fix Issues

Use the detailed breakdown to fix long sentences, passive voice, heading skips, or low entity density.

05

Export the Report

Copy a summary of findings or the cleaned content back to your editor.

About the SEO Writing Assistant

The SEO Writing Assistant is a free, private, browser-based tool that helps content creators, SEO professionals, and website owners write content that ranks higher in both traditional search engines and AI-powered answer engines.

Unlike generic readability checkers, this tool analyzes content across five modern scoring dimensions — Readability, SEO Optimization, Structure, AI/LLM Readiness, and Engagement/Voice — and produces a single A-F content grade with specific, actionable recommendations.

All processing happens in your browser. No sign-up, no data storage, no tracking.

Related Tools

Keyword Data Analyzer
Meta Tag Generator
Open Graph Generator
SERP Preview & Meta Tag Analyzer
Schema Generator