Analyze single words, bigrams, and trigrams with keyword stuffing warnings.
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.
Paste your article copy, blog draft, or webpage content into the editor.
Toggle 1-word, 2-word, or 3-word phrase frequency analysis and stop-word filtering.
Check keyword density percentages and export the full frequency table to CSV.
A keyword density of 1% to 2.5% is generally considered optimal. Anything above 3.5% may risk keyword stuffing penalties.
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.
