AnchorKite Readability Checker vs Text Inspector

AnchorKite Readability Checker is a free browser tool for evaluating pasted English text. It reports Flesch Reading Ease, Flesch-Kincaid Grade Level, Gunning Fog, SMOG, Coleman-Liau, and Automated Readability Index scores. A headline grade estimate averages five grade-level formulas. The page also displays word, sentence, syllable, and letter counts, together with words per sentence and syllables per word. Analysis runs locally, with no network requests, analytics, transmission, storage, or logging of the text according to the page. After loading, the browser tab can continue working offline. Syllable counting uses an approximate heuristic, so irregular spellings and proper names can differ by a syllable. The maker advises treating scores as a sanity check because lists, code, dialogue, headings, abbreviations, and short passages can affect formulas. Guidance covers teachers, writers, workplace writing, general audiences, and specialist writing.

Text Inspector analyses English text for difficulty, readability, lexical diversity, and CEFR levels. Its overall difficulty score draws on more than 200 metrics, while the CEFR Level Checker gives individual words a level along with their commonness and difficulty. Listed tools include Statistics and Readability, Lexical Diversity, Scorecard, Tagger, EVP, BNC, COCA, Academic Word List and Phrases, Knowledge-Based Vocabulary Lists, and Metadiscourse Markers. An API lets people and organisations add analysis and scoring to their own products. The maker describes it as useful to language professionals, academics, and students preparing teaching materials or tests and evaluating student work. English is fully supported; other languages may receive limited statistics or lexical-diversity information. The Free plan covers 250 words and automatically deletes analysis data after six hours. The Organisation plan allows up to 13,000 words, the largest stated limit. A 30-day trial is listed for API access, which starts from £360 per year.