Transparent calculations
Counts, percentages, and per-1,000 rates stay visible so you can verify what each result means.
WEB · API · CLI · MCP
Free Text Analysis Tools
For Humans and AI Agents
Use transparent text analysis in the browser, automate it through a stateless API, or run the same deterministic methods locally from a terminal or AI agent.
Pasted text is processed without server storage.8live tools
4analysis languages
0submitted text stored
Analyze in the browser
Load an example, paste your text, and inspect a transparent result without writing code.
Browse the eight tools→DEVELOPERSAutomate with API or CLI
Use stable JSON endpoints or the local-first npm CLI in scripts, CI, and editorial workflows.
Read developer docs→AI AGENTSConnect deterministic tools
Works with MCP-compatible agents such as Codex, Claude Code, and Gemini CLI. They can call precise, read-only analysis tools instead of guessing word counts.
Open agent integrations→AVAILABLE NOW
Start with the question you need to answer
Each tool has a focused workflow, visible formulas, and a result you can inspect instead of a single opaque score.
01 · LIVE
Word Frequency Counter
Count every word, search and sort the full vocabulary, edit stop words, and export CSV or JSON.
Open tool→02 · LIVE
Keyword Density Checker
Measure words, bigrams, and trigrams, track exact phrases, and compare density changes between two results.
Open tool→03 · LIVE
Bag of Words Analyzer
Review vocabulary, bigrams, tracked phrases, and Zipf distribution, then compare result A with result B.
Open tool→04 · LIVE
Text Analysis Comparison
Compare two texts or webpages by word count, vocabulary, normalized word frequency, bigrams, and Zipf diagnostics.
Open tool→05 · LIVE
N-gram Analyzer
Analyze recurring phrases of custom length (including bigrams and trigrams) in text or a public webpage.
Open tool→06 · LIVE
Bag of Words Generator
Build raw term vectors from text or a URL and inspect term frequencies, percentages, and export-ready rows.
Open tool→07 · LIVE
TF-IDF Calculator
Calculate corpus-aware TF-IDF scores for 2–10 documents and compare weighted term influence.
Open tool→08 · LIVE
Text Similarity Calculator
Measure cosine similarity between two texts with BoW or TF-IDF, then inspect top contribution terms.
Open tool→WHY THIS TOOLKIT
Useful numbers, with the method left visible
Private by design
Text-only work stays in your browser. If a workflow includes a public URL, required inputs use the stateless API and are not stored.
Made for comparison
Normalize texts of different lengths and compare drafts, pages, or versions using the same settings.
No optimization score
The tools expose patterns and repetition without pretending that one percentage determines content quality.
LEARN THE METHODS
Formulas, examples, and limitations
GUIDE
How to Calculate Word Frequency
Counts, percentages, per-1,000 rates, tokenization, and a worked example.
GUIDEKeyword Density Formula
Exact phrase calculations, comparison rules, and why density is not a ranking score.
NLP GUIDEBag of Words Model
How frequency tables become document vectors and machine-learning features.
NLP GUIDETF-IDF Formula
Term frequency, smoothed inverse document frequency, corpus effects, and a worked example.
NLP GUIDECosine Similarity for Text
How document vectors become a 0–1 overlap score and what that score cannot prove.
NLP GUIDEWhat Are N-grams?
Unigrams through longer phrase windows, denominators, filtering, and practical uses.
WORKFLOW GUIDECompare Texts by Word Frequency
Measure normalized vocabulary changes without confusing them with a character diff.
ONE ENGINE · MULTIPLE INTERFACES
Use the same analysis from code, a terminal, or an AI agent
Call the stateless JSON API, run eight local-first npm commands, or expose the same read-only operations through MCP. Every interface uses the same transparent analysis methods.