Word Counter &
Text Analyzer

ToolStack splits your text by whitespace and filters out empty strings, counting each remaining token as a word. Sentences are detected by punctuation (. ! ?), and paragraphs by blank lines. All analysis happens instantly in your browser — no data is ever sent anywhere.

Keyword density is how often a word appears relative to the total word count. SEO professionals use it to ensure content is focused without over-optimizing. A density of 1–3% for your primary keyword is generally healthy. Above 5% may be seen as keyword stuffing by search engines.

The average silent reading speed for adults is around 238 words per minute, based on studies by Brysbaert et al. (2019). We offer three estimates — slow (150 wpm), average (238 wpm), and fast (350 wpm) — to cover the realistic range. Speaking aloud is typically slower at around 150 wpm.

No. Everything runs entirely in your browser using JavaScript. Your text is never sent to any server, never logged, and never stored. You can verify this by disconnecting from the internet — the tool will still work perfectly.

It depends on the context: SEO blog posts typically perform best at 1,500–2,500 words. News articles average 300–600 words. Academic essays are usually 500–5,000 words depending on level. Email newsletters perform best under 200 words. Social captions should be 125–150 characters. The best length is always whatever fully covers the topic without padding.