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WRITING QUALITY ANALYZER

Get a full diagnostic of your writing: readability scores, passive voice detection, adverb density, complex words, tone analysis, and a quality grade A–F. All in your browser.

Input

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Reading

Analysis

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Paste text above and click Analyze

Frequently Asked Questions

How does the AI Writing Quality Analyzer work?
It analyzes your text using six metrics — readability scores (FKGL, FRE, Fog), passive voice detection, adverb density, complex word identification, sentence length distribution, and tone analysis. Everything runs in your browser.
Is my text sent to any server?
No. All processing happens entirely in your browser. Your text is never uploaded, stored, or transmitted. You can work completely offline after the page loads.
What is the maximum text length?
You can analyze up to 5,000 characters per session. There are no daily limits and no sign-up required.
What do the highlight colors mean?
Purple highlights indicate passive voice constructions (to be + past participle). Orange highlights show adverb overuse. Red highlights mark complex words (3+ syllables). Yellow highlights indicate run-on sentences (over 30 words). Teal highlights mark clichés and redundant phrases.
What is a good readability score?
For most general audiences, aim for a Flesch Reading Ease score of 60-70 (Standard) and a FKGL of 7-8. Higher FRE means easier reading. Lower FKGL means the text is understandable by younger readers.
What does the Quality Grade mean?
The grade (A-F) combines readability, sentence variety, passive voice usage, adverb density, and complex word ratio. A grade of A or B indicates clear, well-structured writing. D or F suggests the text may be hard to follow.
What advanced metrics are available?
The tool also computes vocabulary diversity (type-token ratio, lexical density, hapax legomena), transition word coverage, cliché detection, and a per-sentence breakdown showing word count and issue badges for every sentence.
How does passive voice detection work?
The tool detects forms of 'to be' (is, are, was, were, be, been, being) followed by a past participle verb. While passive voice is grammatically correct, overusing it can make writing feel indirect or wordy.
Can I export the analysis?
Yes. Click Copy Report to copy the full analysis to your clipboard, or export as PDF for documentation or sharing.

How to Use

01

Paste or Type Your Text

Write or paste up to 5,000 characters into the input box. Word and character counts update as you type.

02

Click Analyze

Press the Analyze button to run the full writing quality check on your text.

03

Review Highlights

The tool highlights passive voice (purple), adverbs (orange), complex words (red), run-on sentences (yellow), and clichés (teal) directly in your text. Hover each highlight for details.

04

Check Your Scores

Review readability scores (FKGL, FRE, Fog), the quality grade, and tone estimate. Each metric includes a plain-English interpretation.

05

Explore Advanced Panels

Open the Vocabulary, Transitions, and Per-Sentence panels for deeper insight into your writing.

06

Export Your Report

Copy the full analysis report or download as PDF for documentation or sharing.

About the AI Writing Quality Analyzer

The AI Writing Quality Analyzer is a free online tool that gives you a comprehensive diagnostic of your writing quality — all in your browser. It analyzes your text across six core dimensions: readability, passive voice usage, adverb density, complex word frequency, sentence length variety, and writing tone.

In addition to numerical scores (FKGL, FRE, Fog Index), the tool visually highlights issues directly in your text using a color-coded annotation system. Purple highlights indicate passive voice constructions, orange shows adverb overuse, red marks complex words, yellow flags run-on sentences, and teal identifies clichés. Hover any highlight to see why it matters and how to fix it.

Advanced features include vocabulary diversity metrics (type-token ratio, lexical density, hapax legomena), transition word coverage analysis, cliché detection with a database of common overused phrases, a per-sentence breakdown table with issue badges for every sentence, and localStorage-backed history tracking so you can monitor your writing quality over time.

Each metric includes a plain-English interpretation so you can understand what the numbers mean for your readers. The Quality Grade (A through F) combines all metrics into a single at-a-glance score. Tone analysis estimates whether your writing reads as formal, casual, persuasive, positive, or negative.

Built with privacy in mind, all processing happens directly in your browser. No sign-up required, no data stored, no tracking. For complementary writing tools, try our AI Paraphrasing Tool and AI Text Summarizer.

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