Word Counter — Readability, Keyword Density & AI Rewrite
Count words, characters, and sentences in real time. Flesch-Kincaid readability grade + keyword density + AI rewrite at any target grade level — all free, no signup.
AI Rewrite at Target Grade Level
NewPowered by Google Gemini — your text is sent to Google for AI processing. The Word Counter, keyword density, and readability score above all run locally and never leave your device.
About This Tool
Word count, readability, keyword density, and AI rewrite — all free
Most tools charge for readability scoring (Hemingway App) or keyword density analysis (Grammarly Premium). This tool gives you both free — paste any text and see Flesch-Kincaid grade level and top keyword density instantly.
And when your text scores Grade 12 but your audience needs Grade 6, the new AI Rewrite button (powered by Google Gemini) rewrites your text at any target reading level — preserving every fact while simplifying the vocabulary and sentence structure.
Use our Lorem Ipsum Generator to create placeholder text for testing or Case Converter to format text.
Real-time Analysis
Counts update as you type — no button needed.
Readability Grade
Flesch-Kincaid grade level — competitors charge for this.
Keyword Density
Top 10 keywords with % frequency — free SEO analysis.
AI Rewrite
Rewrite at any target grade level — Gemini AI, free.
Core Tools Private
Counts and density run locally; AI sends text to Google.
No Length Limit
Count and analyze any length of text instantly.
Quick Start
How to Use Word Counter
Paste Your Text
Type or paste any text — article, essay, email, or social post.
Read the Stats
Word count, character count, sentences, paragraphs, reading time, and speaking time update instantly.
Check Readability
See your Flesch-Kincaid grade level (Grade 6–8 is ideal for web content) and top keyword density below the text area.
AI Rewrite (Optional)
If your grade level is too high, pick a target grade and click Rewrite. The AI simplifies your text while preserving meaning.
Use Cases
When to Use Word Counter
From SEO copywriters checking keyword density to students hitting essay word limits — here's who uses it.
SEO Keyword Density
Check your primary keyword appears at 1–3% density. Too low = weak signal. Too high = keyword stuffing penalty.
Content Readability Audit
Paste a blog post and check the FK grade. Most web content should target Grade 6–8 for maximum reach.
Simplify Technical Writing (AI)
Got a Grade 14 doc that needs to reach a general audience? Pick Grade 8 and click Rewrite — the AI keeps every fact and simplifies the vocabulary.
ESL / Translation Prep (AI)
Rewrite English content at Grade 6 so non-native readers and translation tools handle it more accurately.
Accessibility & Plain Language (AI)
Public-sector and healthcare guidance often requires Grade 6–8 content. Use AI Rewrite to meet plain-language requirements.
Essay & Assignment Limits
Verify your essay stays within the required word count. Updates in real time as you edit.
Social Media Posts
Check character counts for tweets (280), LinkedIn posts (3,000), and ad copy before publishing.
Presentations & Speeches
Use speaking time (130 WPM) to calculate whether your script fits within your allotted slot.
FAQ
Frequently Asked Questions
The Flesch-Kincaid Grade Level (FKGL) estimates the US school grade level needed to understand your text. Grade 6 is easy; Grade 12 is college level. It factors in average sentence length and syllables per word. Most web content should target Grade 6–8. Tools like Hemingway App charge for this — it's free here.
AI Rewrite is powered by Google Gemini. You pick a target grade level (3–16), click Rewrite, and the AI rewrites your text at that reading level. It preserves every fact and the author's voice — it only adjusts vocabulary and sentence complexity. Useful for simplifying technical writing, preparing content for ESL readers, or meeting plain-language guidelines.
The Word Counter itself (counts, readability, keyword density) runs entirely in your browser — those features remain 100% private. The AI Rewrite is the exception: when you click Rewrite, your text is sent to Google Gemini for processing. If your content is confidential, do not use the AI Rewrite feature for that text. The other tools stay private regardless.
Keyword density = (word frequency ÷ total words) × 100. Common stop words (the, a, and, is, etc.) are excluded so only meaningful keywords appear. The top 10 keywords by density are shown with their percentage and count. Ideal SEO density for a primary keyword is 1–3%.
Very accurate. Words are split on spaces and punctuation, matching how most word processors count. Multiple spaces, line breaks, and special characters are handled correctly.
Reading time is estimated at 200 words per minute (average adult reading speed). Speaking time uses 130 WPM — typical for a presentation. A 1,000-word article = 5 min read, ~8 min speaking time.
For counting, readability, and keyword density: no limit. For AI Rewrite specifically: 5,000 characters max per request, and a per-minute rate limit is enforced to prevent abuse. Most articles fit comfortably.
Yes. Twitter/X allows 280 characters including spaces. LinkedIn posts up to 3,000 characters. The counter updates in real time as you type.
Paste your article. In the keyword density table below, find your primary keyword. If density is below 0.5%, add it more naturally. If above 3%, reduce usage. Aim for 1–2% for your main keyword, 0.5–1% for secondary keywords.
Yes for the core features (word count, character count, readability score, keyword density) — they run entirely in your browser without an internet connection. The new AI Rewrite feature requires internet because it calls Google Gemini's servers.