Four pillars, checked live as you type
This tool scores your draft against four separate signals - Readability, SEO, Tone of Voice, and Originality - each shown as its own score with the specific checks behind it, plus an overall Content Score that averages all four. Everything runs in your browser as you type; nothing is uploaded anywhere.
Readability: sentence structure and passive voice
Alongside the Flesch Reading Ease formula used elsewhere on this site, this pillar scans every sentence for passive voice and for sentences running past 35 words, and highlights both directly inside the editor - amber for passive voice, purple for long sentences - so you can see exactly where to tighten things up. Each flagged sentence in the sidebar has a "Jump" button that selects it in the editor.
SEO: on-page basics, including an AI-readiness check
This checks your content length, keyword density and placement (once you enter a target keyword), and whether your title/H1 contains it. It also runs a lightweight check of whether your content opens with a direct, concise statement and uses headings or lists - structural signals that make content easier for AI answer engines to parse and extract. For a deeper structural analysis, this links out to the dedicated AI Readability Grader rather than duplicating it here.
Tone of Voice: formality, sentiment and confidence
Using word-list matching (not a trained sentiment model), this flags whether your draft leans formal or casual, positive or negative, how much hedging language ("might", "perhaps", "could") appears, and whether you address the reader directly with "you" / "your". Heavy hedging and a complete absence of reader-directed language both pull the score down slightly, since both tend to read as less engaging on the web.
Originality: honest signals, not a plagiarism scan
This is deliberately not a web plagiarism checker - it has no connection to any search index. Instead it measures three things entirely within your own draft: vocabulary variety (how repetitive your word choice is), overused stock phrases ("at the end of the day", "it goes without saying", and similar), and sentences repeated more than once in the same draft. If you need a real duplicate-content check against the web, this pillar links directly to the Plagiarism Checker instead of pretending to be one.
Why there's a single overall score, and why it can disagree with any one pillar
The Content Score is a simple average of the four pillar scores, shown so you have one number to glance at first - but the four pillars underneath it measure genuinely different things, so a strong overall score can still sit alongside one weak pillar worth fixing, and that's by design rather than a contradiction.