Analyze word occurrences, keyword frequency density, and stop-word filtering.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Input your article, essay, or blog draft into the workspace.
Toggle English stop-word filtering or adjust minimum word length.
Review the ranked frequency chart and export statistics to CSV.
Most SEO professionals target a primary keyword density between 1% and 2.5% to avoid keyword stuffing penalties.
Stop words are common grammatical words (like 'the', 'is', 'and', 'at') filtered out so that meaningful topical keywords can be analyzed.
Zero-egress companion tools in the Text Utilities suite
Calculate US grade level comprehension using the Automated Readability Index (ARI) formula.
Strip accents and normalize European characters into plain ASCII Latin letters.
Encode and decode reversible ROT13 and custom Caesar cipher text strings.
Format scientific Markdown chemical formulas and mathematical exponents.
